./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/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_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/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_9ea978e5-665f-43c6-830e-d1b22845a591/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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- 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 20:26:38,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:26:38,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:26:38,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:26:38,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:26:38,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:26:38,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:26:38,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:26:38,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:26:38,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:26:38,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:26:38,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:26:38,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:26:38,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:26:38,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:26:38,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:26:38,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:26:38,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:26:38,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:26:38,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:26:38,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:26:38,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:26:38,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:26:38,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:26:38,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:26:38,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:26:38,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:26:38,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:26:38,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:26:38,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:26:38,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:26:38,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:26:38,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:26:38,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:26:38,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:26:38,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:26:38,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:26:38,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:26:38,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:26:38,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:26:38,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:26:38,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:26:38,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:26:38,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:26:38,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:26:38,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:26:38,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:26:38,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:26:38,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:26:38,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:26:38,746 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:26:38,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:26:38,747 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:26:38,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:26:38,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:26:38,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:26:38,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:26:38,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:26:38,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:26:38,749 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:26:38,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:26:38,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:26:38,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:26:38,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:26:38,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:26:38,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:26:38,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:26:38,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:26:38,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:26:38,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:26:38,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:26:38,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:26:38,755 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:26:38,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:26:38,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:26:38,756 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_9ea978e5-665f-43c6-830e-d1b22845a591/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-11-02 20:26:39,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:26:39,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:26:39,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:26:39,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:26:39,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:26:39,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-02 20:26:39,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/data/b7509d612/c343a3cc6a5b4dfbb33931bfbb7ca40d/FLAG706c3617e [2022-11-02 20:26:39,845 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:26:39,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-02 20:26:39,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/data/b7509d612/c343a3cc6a5b4dfbb33931bfbb7ca40d/FLAG706c3617e [2022-11-02 20:26:40,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/data/b7509d612/c343a3cc6a5b4dfbb33931bfbb7ca40d [2022-11-02 20:26:40,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:26:40,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:26:40,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:26:40,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:26:40,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:26:40,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de2ba4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40, skipping insertion in model container [2022-11-02 20:26:40,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:26:40,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:26:40,579 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_9ea978e5-665f-43c6-830e-d1b22845a591/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-02 20:26:40,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:26:40,596 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:26:40,637 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_9ea978e5-665f-43c6-830e-d1b22845a591/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-02 20:26:40,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:26:40,660 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:26:40,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40 WrapperNode [2022-11-02 20:26:40,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:26:40,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:26:40,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:26:40,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:26:40,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,719 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-11-02 20:26:40,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:26:40,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:26:40,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:26:40,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:26:40,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:26:40,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:26:40,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:26:40,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:26:40,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (1/1) ... [2022-11-02 20:26:40,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:26:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:40,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:26:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:26:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:26:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:26:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:26:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:26:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:26:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:26:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:26:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:26:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:26:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:26:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:26:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:26:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:26:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:26:40,894 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 20:26:41,051 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:26:41,055 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:26:41,325 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:26:41,405 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:26:41,405 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:26:41,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:26:41 BoogieIcfgContainer [2022-11-02 20:26:41,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:26:41,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:26:41,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:26:41,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:26:41,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:26:40" (1/3) ... [2022-11-02 20:26:41,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25883416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:26:41, skipping insertion in model container [2022-11-02 20:26:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:26:40" (2/3) ... [2022-11-02 20:26:41,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25883416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:26:41, skipping insertion in model container [2022-11-02 20:26:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:26:41" (3/3) ... [2022-11-02 20:26:41,424 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-02 20:26:41,436 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:26:41,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:26:41,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:26:41,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:26:41,566 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:26:41,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-02 20:26:41,674 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-02 20:26:41,674 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:26:41,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-02 20:26:41,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-02 20:26:41,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-02 20:26:41,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:26:41,718 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;@247acc17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:26:41,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:26:41,789 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-02 20:26:41,789 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:26:41,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:41,791 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] [2022-11-02 20:26:41,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1254133550, now seen corresponding path program 1 times [2022-11-02 20:26:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:41,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241515014] [2022-11-02 20:26:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:42,189 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 20:26:42,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241515014] [2022-11-02 20:26:42,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241515014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:42,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:42,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:26:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381915057] [2022-11-02 20:26:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:42,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:26:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:26:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:26:42,255 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-11-02 20:26:42,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 20:26:42,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:42,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-11-02 20:26:42,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:42,311 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-11-02 20:26:42,311 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-02 20:26:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-11-02 20:26:42,314 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-02 20:26:42,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-11-02 20:26:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:26:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:26:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-11-02 20:26:42,340 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-11-02 20:26:42,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-11-02 20:26:42,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-11-02 20:26:42,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:42,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-11-02 20:26:42,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 20:26:42,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 20:26:42,371 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 20:26:42,373 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-11-02 20:26:42,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-11-02 20:26:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:26:42,393 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-02 20:26:42,395 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-02 20:26:42,399 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-02 20:26:42,400 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-02 20:26:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 20:26:42,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:42,400 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] [2022-11-02 20:26:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:26:42,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-11-02 20:26:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:42,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201609121] [2022-11-02 20:26:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:43,279 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 20:26:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201609121] [2022-11-02 20:26:43,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201609121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:43,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:26:43,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:26:43,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638481608] [2022-11-02 20:26:43,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:43,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:26:43,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:26:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:26:43,286 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-11-02 20:26:43,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 20:26:43,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:43,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-11-02 20:26:43,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:43,450 INFO L130 PetriNetUnfolder]: 50/172 cut-off events. [2022-11-02 20:26:43,454 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:26:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 491 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-11-02 20:26:43,460 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-11-02 20:26:43,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-11-02 20:26:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:26:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:26:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-11-02 20:26:43,470 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-02 20:26:43,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-11-02 20:26:43,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-11-02 20:26:43,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:43,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-11-02 20:26:43,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 20:26:43,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 20:26:43,484 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 20:26:43,484 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-11-02 20:26:43,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-11-02 20:26:43,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:26:43,488 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-11-02 20:26:43,489 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-02 20:26:43,490 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-11-02 20:26:43,490 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-11-02 20:26:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 20:26:43,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:43,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:43,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:26:43,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-11-02 20:26:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071928066] [2022-11-02 20:26:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:43,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:43,859 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 20:26:43,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:43,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071928066] [2022-11-02 20:26:43,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071928066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170128788] [2022-11-02 20:26:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:43,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:43,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:26:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:26:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:44,311 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 20:26:44,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:44,459 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 20:26:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170128788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:44,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:44,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-11-02 20:26:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116392453] [2022-11-02 20:26:44,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:44,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:26:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:26:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:26:44,468 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-11-02 20:26:44,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 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 20:26:44,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:44,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-11-02 20:26:44,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:44,934 INFO L130 PetriNetUnfolder]: 91/351 cut-off events. [2022-11-02 20:26:44,934 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-02 20:26:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-11-02 20:26:44,943 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-11-02 20:26:44,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-11-02 20:26:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:26:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:26:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-11-02 20:26:44,950 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-11-02 20:26:44,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-11-02 20:26:44,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-11-02 20:26:44,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:44,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-11-02 20:26:44,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 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 20:26:44,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 20:26:44,960 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 20:26:44,960 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-11-02 20:26:44,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-11-02 20:26:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:26:44,968 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-11-02 20:26:44,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-11-02 20:26:44,971 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-02 20:26:44,972 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-11-02 20:26:44,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 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 20:26:44,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:44,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:45,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:45,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:45,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash -628521019, now seen corresponding path program 2 times [2022-11-02 20:26:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228756724] [2022-11-02 20:26:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:45,579 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 20:26:45,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:45,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228756724] [2022-11-02 20:26:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228756724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983788597] [2022-11-02 20:26:45,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:26:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:45,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:45,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:26:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:26:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:26:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:45,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:26:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983788597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:45,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:26:45,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-02 20:26:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655950984] [2022-11-02 20:26:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:45,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:26:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:26:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:26:45,978 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-11-02 20:26:45,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 20:26:45,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:45,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-11-02 20:26:45,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:46,254 INFO L130 PetriNetUnfolder]: 69/269 cut-off events. [2022-11-02 20:26:46,255 INFO L131 PetriNetUnfolder]: For 416/422 co-relation queries the response was YES. [2022-11-02 20:26:46,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 269 events. 69/269 cut-off events. For 416/422 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1047 event pairs, 15 based on Foata normal form. 12/273 useless extension candidates. Maximal degree in co-relation 708. Up to 68 conditions per place. [2022-11-02 20:26:46,259 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-11-02 20:26:46,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-11-02 20:26:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:26:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:26:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-11-02 20:26:46,262 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-11-02 20:26:46,262 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-11-02 20:26:46,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-11-02 20:26:46,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:46,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-11-02 20:26:46,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 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 20:26:46,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 20:26:46,267 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 20:26:46,267 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-11-02 20:26:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-11-02 20:26:46,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:26:46,276 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-11-02 20:26:46,277 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-11-02 20:26:46,278 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-11-02 20:26:46,278 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-11-02 20:26:46,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 20:26:46,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:46,279 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] [2022-11-02 20:26:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:46,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-02 20:26:46,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1629171339, now seen corresponding path program 1 times [2022-11-02 20:26:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:46,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492576881] [2022-11-02 20:26:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:46,811 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 20:26:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492576881] [2022-11-02 20:26:46,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492576881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695007249] [2022-11-02 20:26:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:46,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:46,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:26:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:26:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:47,116 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 20:26:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:47,550 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 20:26:47,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695007249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:47,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:47,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-11-02 20:26:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152259000] [2022-11-02 20:26:47,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:47,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:26:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:26:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:26:47,555 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-11-02 20:26:47,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 20:26:47,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:47,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-11-02 20:26:47,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:48,133 INFO L130 PetriNetUnfolder]: 185/527 cut-off events. [2022-11-02 20:26:48,133 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2022-11-02 20:26:48,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 527 events. 185/527 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2605 event pairs, 17 based on Foata normal form. 20/543 useless extension candidates. Maximal degree in co-relation 1717. Up to 145 conditions per place. [2022-11-02 20:26:48,141 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 76 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2022-11-02 20:26:48,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 1138 flow [2022-11-02 20:26:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:26:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:26:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 852 transitions. [2022-11-02 20:26:48,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-11-02 20:26:48,145 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 852 transitions. [2022-11-02 20:26:48,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 852 transitions. [2022-11-02 20:26:48,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:48,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 852 transitions. [2022-11-02 20:26:48,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.53846153846153) internal successors, (852), 13 states have internal predecessors, (852), 0 states have call successors, (0), 0 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 20:26:48,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 20:26:48,152 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 20:26:48,152 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 13 states and 852 transitions. [2022-11-02 20:26:48,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 1138 flow [2022-11-02 20:26:48,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1078 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-11-02 20:26:48,165 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 861 flow [2022-11-02 20:26:48,165 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=861, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2022-11-02 20:26:48,166 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2022-11-02 20:26:48,166 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 861 flow [2022-11-02 20:26:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 20:26:48,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:48,167 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] [2022-11-02 20:26:48,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:48,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:48,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1750043595, now seen corresponding path program 2 times [2022-11-02 20:26:48,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987101733] [2022-11-02 20:26:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:49,145 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 20:26:49,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:49,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987101733] [2022-11-02 20:26:49,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987101733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:49,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258366865] [2022-11-02 20:26:49,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:26:49,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:49,152 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:49,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:26:49,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:49,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:26:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:49,451 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 20:26:49,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:49,762 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 20:26:49,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258366865] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:49,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:26:49,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 8] total 16 [2022-11-02 20:26:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455577472] [2022-11-02 20:26:49,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:49,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:26:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:26:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:26:49,770 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-11-02 20:26:49,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 20:26:49,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:49,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-11-02 20:26:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:50,124 INFO L130 PetriNetUnfolder]: 197/702 cut-off events. [2022-11-02 20:26:50,125 INFO L131 PetriNetUnfolder]: For 3162/3224 co-relation queries the response was YES. [2022-11-02 20:26:50,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2766 conditions, 702 events. 197/702 cut-off events. For 3162/3224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4192 event pairs, 20 based on Foata normal form. 31/726 useless extension candidates. Maximal degree in co-relation 2743. Up to 187 conditions per place. [2022-11-02 20:26:50,137 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 79 selfloop transitions, 18 changer transitions 21/180 dead transitions. [2022-11-02 20:26:50,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 180 transitions, 1497 flow [2022-11-02 20:26:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:26:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:26:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-11-02 20:26:50,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-11-02 20:26:50,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-11-02 20:26:50,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-11-02 20:26:50,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:50,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-11-02 20:26:50,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 20:26:50,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 20:26:50,145 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 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 20:26:50,145 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 861 flow. Second operand 6 states and 378 transitions. [2022-11-02 20:26:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 180 transitions, 1497 flow [2022-11-02 20:26:50,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1489 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-02 20:26:50,175 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1072 flow [2022-11-02 20:26:50,175 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-11-02 20:26:50,179 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 47 predicate places. [2022-11-02 20:26:50,180 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1072 flow [2022-11-02 20:26:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 20:26:50,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:50,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:50,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:50,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:50,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:50,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1478394585, now seen corresponding path program 3 times [2022-11-02 20:26:50,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153183926] [2022-11-02 20:26:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:50,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:50,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153183926] [2022-11-02 20:26:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153183926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983716696] [2022-11-02 20:26:50,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:26:50,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:50,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:50,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:51,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:26:51,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:26:51,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:51,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:26:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:51,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:51,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983716696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:51,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:51,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-11-02 20:26:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795114149] [2022-11-02 20:26:51,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:51,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:26:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:26:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:26:51,733 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:26:51,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1072 flow. Second operand has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:51,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:51,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:26:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:53,298 INFO L130 PetriNetUnfolder]: 415/1200 cut-off events. [2022-11-02 20:26:53,298 INFO L131 PetriNetUnfolder]: For 6924/6937 co-relation queries the response was YES. [2022-11-02 20:26:53,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1200 events. 415/1200 cut-off events. For 6924/6937 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8130 event pairs, 14 based on Foata normal form. 28/1224 useless extension candidates. Maximal degree in co-relation 5341. Up to 242 conditions per place. [2022-11-02 20:26:53,318 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 81 selfloop transitions, 178 changer transitions 18/332 dead transitions. [2022-11-02 20:26:53,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 332 transitions, 3623 flow [2022-11-02 20:26:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:26:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:26:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-11-02 20:26:53,325 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-11-02 20:26:53,326 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-11-02 20:26:53,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-11-02 20:26:53,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:53,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-11-02 20:26:53,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 20:26:53,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 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 20:26:53,343 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 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 20:26:53,343 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1072 flow. Second operand 32 states and 2124 transitions. [2022-11-02 20:26:53,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 332 transitions, 3623 flow [2022-11-02 20:26:53,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 332 transitions, 3619 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-02 20:26:53,392 INFO L231 Difference]: Finished difference. Result has 167 places, 260 transitions, 3149 flow [2022-11-02 20:26:53,393 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3149, PETRI_PLACES=167, PETRI_TRANSITIONS=260} [2022-11-02 20:26:53,394 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 93 predicate places. [2022-11-02 20:26:53,394 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 260 transitions, 3149 flow [2022-11-02 20:26:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:53,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:53,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:53,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:26:53,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:53,616 INFO L85 PathProgramCache]: Analyzing trace with hash -577994853, now seen corresponding path program 4 times [2022-11-02 20:26:53,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:53,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001056316] [2022-11-02 20:26:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:54,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001056316] [2022-11-02 20:26:54,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001056316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114332484] [2022-11-02 20:26:54,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:26:54,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:54,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:54,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:26:54,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:26:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:54,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:26:54,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:54,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:54,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114332484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:54,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:54,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 20:26:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700306803] [2022-11-02 20:26:54,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:26:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:26:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:26:54,929 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:26:54,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 260 transitions, 3149 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 20:26:54,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:54,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:26:54,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:26:56,391 INFO L130 PetriNetUnfolder]: 501/1369 cut-off events. [2022-11-02 20:26:56,391 INFO L131 PetriNetUnfolder]: For 15393/15406 co-relation queries the response was YES. [2022-11-02 20:26:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 1369 events. 501/1369 cut-off events. For 15393/15406 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8945 event pairs, 22 based on Foata normal form. 12/1378 useless extension candidates. Maximal degree in co-relation 8286. Up to 328 conditions per place. [2022-11-02 20:26:56,520 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 117 selfloop transitions, 228 changer transitions 5/405 dead transitions. [2022-11-02 20:26:56,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 405 transitions, 6014 flow [2022-11-02 20:26:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:26:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 20:26:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-11-02 20:26:56,526 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-11-02 20:26:56,527 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-11-02 20:26:56,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-11-02 20:26:56,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:26:56,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-11-02 20:26:56,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 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 20:26:56,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 20:26:56,541 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 20:26:56,541 INFO L175 Difference]: Start difference. First operand has 167 places, 260 transitions, 3149 flow. Second operand 22 states and 1451 transitions. [2022-11-02 20:26:56,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 405 transitions, 6014 flow [2022-11-02 20:26:56,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 405 transitions, 5788 flow, removed 112 selfloop flow, removed 1 redundant places. [2022-11-02 20:26:56,709 INFO L231 Difference]: Finished difference. Result has 198 places, 360 transitions, 5500 flow [2022-11-02 20:26:56,710 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5500, PETRI_PLACES=198, PETRI_TRANSITIONS=360} [2022-11-02 20:26:56,714 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 124 predicate places. [2022-11-02 20:26:56,714 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 360 transitions, 5500 flow [2022-11-02 20:26:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 20:26:56,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:26:56,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:26:56,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:56,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:26:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 841730425, now seen corresponding path program 5 times [2022-11-02 20:26:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517592685] [2022-11-02 20:26:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:56,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:57,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517592685] [2022-11-02 20:26:57,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517592685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:57,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904504735] [2022-11-02 20:26:57,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:26:57,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:57,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:57,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:26:57,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:57,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:57,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:26:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904504735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:58,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:58,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-11-02 20:26:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917414747] [2022-11-02 20:26:58,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:26:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:26:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:26:58,520 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:26:58,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 360 transitions, 5500 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 20:26:58,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:26:58,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:26:58,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:05,044 INFO L130 PetriNetUnfolder]: 639/1941 cut-off events. [2022-11-02 20:27:05,044 INFO L131 PetriNetUnfolder]: For 28845/28864 co-relation queries the response was YES. [2022-11-02 20:27:05,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 1941 events. 639/1941 cut-off events. For 28845/28864 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14799 event pairs, 16 based on Foata normal form. 36/1964 useless extension candidates. Maximal degree in co-relation 12464. Up to 407 conditions per place. [2022-11-02 20:27:05,159 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 129 selfloop transitions, 492 changer transitions 2/678 dead transitions. [2022-11-02 20:27:05,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 678 transitions, 11996 flow [2022-11-02 20:27:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:27:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-02 20:27:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4684 transitions. [2022-11-02 20:27:05,174 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7744708994708994 [2022-11-02 20:27:05,174 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4684 transitions. [2022-11-02 20:27:05,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4684 transitions. [2022-11-02 20:27:05,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:05,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4684 transitions. [2022-11-02 20:27:05,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 65.05555555555556) internal successors, (4684), 72 states have internal predecessors, (4684), 0 states have call successors, (0), 0 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 20:27:05,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 0 states have call successors, (0), 0 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 20:27:05,222 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 0 states have call successors, (0), 0 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 20:27:05,222 INFO L175 Difference]: Start difference. First operand has 198 places, 360 transitions, 5500 flow. Second operand 72 states and 4684 transitions. [2022-11-02 20:27:05,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 678 transitions, 11996 flow [2022-11-02 20:27:05,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 678 transitions, 11343 flow, removed 311 selfloop flow, removed 4 redundant places. [2022-11-02 20:27:05,543 INFO L231 Difference]: Finished difference. Result has 267 places, 610 transitions, 10628 flow [2022-11-02 20:27:05,544 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10628, PETRI_PLACES=267, PETRI_TRANSITIONS=610} [2022-11-02 20:27:05,545 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 193 predicate places. [2022-11-02 20:27:05,546 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 610 transitions, 10628 flow [2022-11-02 20:27:05,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 20:27:05,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:05,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:05,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:05,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1113448201, now seen corresponding path program 6 times [2022-11-02 20:27:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429177357] [2022-11-02 20:27:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:06,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429177357] [2022-11-02 20:27:06,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429177357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633081515] [2022-11-02 20:27:06,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:27:06,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:06,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:06,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:27:06,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:27:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:06,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:07,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633081515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:07,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:07,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 20:27:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630507338] [2022-11-02 20:27:07,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:07,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:27:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:07,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:27:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:27:07,140 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:27:07,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 610 transitions, 10628 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:07,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:07,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:27:07,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:10,628 INFO L130 PetriNetUnfolder]: 805/2313 cut-off events. [2022-11-02 20:27:10,628 INFO L131 PetriNetUnfolder]: For 31410/31433 co-relation queries the response was YES. [2022-11-02 20:27:10,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15909 conditions, 2313 events. 805/2313 cut-off events. For 31410/31433 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18107 event pairs, 17 based on Foata normal form. 20/2324 useless extension candidates. Maximal degree in co-relation 15847. Up to 503 conditions per place. [2022-11-02 20:27:10,689 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 212 selfloop transitions, 564 changer transitions 6/837 dead transitions. [2022-11-02 20:27:10,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 837 transitions, 16138 flow [2022-11-02 20:27:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:27:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-02 20:27:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3157 transitions. [2022-11-02 20:27:10,696 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7829861111111112 [2022-11-02 20:27:10,697 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3157 transitions. [2022-11-02 20:27:10,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3157 transitions. [2022-11-02 20:27:10,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:10,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3157 transitions. [2022-11-02 20:27:10,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.77083333333333) internal successors, (3157), 48 states have internal predecessors, (3157), 0 states have call successors, (0), 0 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 20:27:10,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:10,717 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:10,717 INFO L175 Difference]: Start difference. First operand has 267 places, 610 transitions, 10628 flow. Second operand 48 states and 3157 transitions. [2022-11-02 20:27:10,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 837 transitions, 16138 flow [2022-11-02 20:27:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 837 transitions, 14363 flow, removed 683 selfloop flow, removed 17 redundant places. [2022-11-02 20:27:11,165 INFO L231 Difference]: Finished difference. Result has 311 places, 768 transitions, 14135 flow [2022-11-02 20:27:11,167 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9346, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=14135, PETRI_PLACES=311, PETRI_TRANSITIONS=768} [2022-11-02 20:27:11,167 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 237 predicate places. [2022-11-02 20:27:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 768 transitions, 14135 flow [2022-11-02 20:27:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:11,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:11,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:11,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -629797127, now seen corresponding path program 7 times [2022-11-02 20:27:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:11,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364067652] [2022-11-02 20:27:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:12,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364067652] [2022-11-02 20:27:12,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364067652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142919001] [2022-11-02 20:27:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:27:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:12,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:12,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:27:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:13,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142919001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:13,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:13,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-02 20:27:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130800624] [2022-11-02 20:27:13,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:27:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:27:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:13,026 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:27:13,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 768 transitions, 14135 flow. Second operand has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 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 20:27:13,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:13,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:27:13,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:18,055 INFO L130 PetriNetUnfolder]: 1289/3874 cut-off events. [2022-11-02 20:27:18,056 INFO L131 PetriNetUnfolder]: For 43821/43853 co-relation queries the response was YES. [2022-11-02 20:27:18,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 3874 events. 1289/3874 cut-off events. For 43821/43853 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34734 event pairs, 57 based on Foata normal form. 57/3914 useless extension candidates. Maximal degree in co-relation 24742. Up to 735 conditions per place. [2022-11-02 20:27:18,161 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 333 selfloop transitions, 941 changer transitions 1/1330 dead transitions. [2022-11-02 20:27:18,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1330 transitions, 26573 flow [2022-11-02 20:27:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:27:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-02 20:27:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3187 transitions. [2022-11-02 20:27:18,182 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7904265873015873 [2022-11-02 20:27:18,182 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3187 transitions. [2022-11-02 20:27:18,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3187 transitions. [2022-11-02 20:27:18,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:18,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3187 transitions. [2022-11-02 20:27:18,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.39583333333333) internal successors, (3187), 48 states have internal predecessors, (3187), 0 states have call successors, (0), 0 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 20:27:18,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:18,201 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:18,201 INFO L175 Difference]: Start difference. First operand has 311 places, 768 transitions, 14135 flow. Second operand 48 states and 3187 transitions. [2022-11-02 20:27:18,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1330 transitions, 26573 flow [2022-11-02 20:27:18,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1330 transitions, 25861 flow, removed 189 selfloop flow, removed 15 redundant places. [2022-11-02 20:27:18,764 INFO L231 Difference]: Finished difference. Result has 361 places, 1202 transitions, 25652 flow [2022-11-02 20:27:18,766 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=13753, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=25652, PETRI_PLACES=361, PETRI_TRANSITIONS=1202} [2022-11-02 20:27:18,766 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 287 predicate places. [2022-11-02 20:27:18,767 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1202 transitions, 25652 flow [2022-11-02 20:27:18,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 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 20:27:18,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:18,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:18,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:27:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:18,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1882238225, now seen corresponding path program 8 times [2022-11-02 20:27:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280615794] [2022-11-02 20:27:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:19,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280615794] [2022-11-02 20:27:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280615794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152295399] [2022-11-02 20:27:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:19,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:19,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:27:19,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:19,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:19,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:20,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152295399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:20,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:20,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-11-02 20:27:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90461622] [2022-11-02 20:27:20,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:27:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:27:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:27:20,299 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:27:20,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1202 transitions, 25652 flow. Second operand has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 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 20:27:20,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:20,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:27:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:26,169 INFO L130 PetriNetUnfolder]: 1647/5326 cut-off events. [2022-11-02 20:27:26,169 INFO L131 PetriNetUnfolder]: For 68523/68550 co-relation queries the response was YES. [2022-11-02 20:27:26,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35926 conditions, 5326 events. 1647/5326 cut-off events. For 68523/68550 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 53131 event pairs, 58 based on Foata normal form. 51/5355 useless extension candidates. Maximal degree in co-relation 35840. Up to 888 conditions per place. [2022-11-02 20:27:26,386 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 366 selfloop transitions, 1255 changer transitions 5/1681 dead transitions. [2022-11-02 20:27:26,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1681 transitions, 38006 flow [2022-11-02 20:27:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:27:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-02 20:27:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3237 transitions. [2022-11-02 20:27:26,396 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7864431486880467 [2022-11-02 20:27:26,396 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3237 transitions. [2022-11-02 20:27:26,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3237 transitions. [2022-11-02 20:27:26,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:26,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3237 transitions. [2022-11-02 20:27:26,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.06122448979592) internal successors, (3237), 49 states have internal predecessors, (3237), 0 states have call successors, (0), 0 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 20:27:26,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 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 20:27:26,419 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 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 20:27:26,419 INFO L175 Difference]: Start difference. First operand has 361 places, 1202 transitions, 25652 flow. Second operand 49 states and 3237 transitions. [2022-11-02 20:27:26,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1681 transitions, 38006 flow [2022-11-02 20:27:27,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1681 transitions, 37616 flow, removed 159 selfloop flow, removed 6 redundant places. [2022-11-02 20:27:27,819 INFO L231 Difference]: Finished difference. Result has 421 places, 1553 transitions, 37438 flow [2022-11-02 20:27:27,820 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25319, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=948, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=37438, PETRI_PLACES=421, PETRI_TRANSITIONS=1553} [2022-11-02 20:27:27,820 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 347 predicate places. [2022-11-02 20:27:27,821 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1553 transitions, 37438 flow [2022-11-02 20:27:27,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 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 20:27:27,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:27,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:27,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:28,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash 288105781, now seen corresponding path program 9 times [2022-11-02 20:27:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379000516] [2022-11-02 20:27:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:28,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:28,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379000516] [2022-11-02 20:27:28,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379000516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423737980] [2022-11-02 20:27:28,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:27:28,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:28,411 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:28,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:27:28,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:27:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:28,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:29,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423737980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:29,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-11-02 20:27:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413549052] [2022-11-02 20:27:29,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:27:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:27:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:29,210 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:27:29,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1553 transitions, 37438 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 20:27:29,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:29,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:27:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:36,728 INFO L130 PetriNetUnfolder]: 1993/6224 cut-off events. [2022-11-02 20:27:36,729 INFO L131 PetriNetUnfolder]: For 119571/119607 co-relation queries the response was YES. [2022-11-02 20:27:36,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49198 conditions, 6224 events. 1993/6224 cut-off events. For 119571/119607 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 62886 event pairs, 55 based on Foata normal form. 32/6246 useless extension candidates. Maximal degree in co-relation 49095. Up to 1192 conditions per place. [2022-11-02 20:27:36,918 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 342 selfloop transitions, 1642 changer transitions 7/2046 dead transitions. [2022-11-02 20:27:36,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2046 transitions, 53676 flow [2022-11-02 20:27:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:27:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-02 20:27:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3140 transitions. [2022-11-02 20:27:36,930 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7787698412698413 [2022-11-02 20:27:36,930 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3140 transitions. [2022-11-02 20:27:36,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3140 transitions. [2022-11-02 20:27:36,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:36,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3140 transitions. [2022-11-02 20:27:36,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.41666666666667) internal successors, (3140), 48 states have internal predecessors, (3140), 0 states have call successors, (0), 0 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 20:27:36,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:36,948 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 20:27:36,949 INFO L175 Difference]: Start difference. First operand has 421 places, 1553 transitions, 37438 flow. Second operand 48 states and 3140 transitions. [2022-11-02 20:27:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2046 transitions, 53676 flow [2022-11-02 20:27:39,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2046 transitions, 52982 flow, removed 154 selfloop flow, removed 15 redundant places. [2022-11-02 20:27:39,259 INFO L231 Difference]: Finished difference. Result has 461 places, 2018 transitions, 53694 flow [2022-11-02 20:27:39,261 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=36828, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=53694, PETRI_PLACES=461, PETRI_TRANSITIONS=2018} [2022-11-02 20:27:39,261 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 387 predicate places. [2022-11-02 20:27:39,262 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2018 transitions, 53694 flow [2022-11-02 20:27:39,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 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 20:27:39,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:39,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:39,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-02 20:27:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:27:39,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 796150931, now seen corresponding path program 10 times [2022-11-02 20:27:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822716409] [2022-11-02 20:27:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:39,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822716409] [2022-11-02 20:27:39,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822716409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59892054] [2022-11-02 20:27:39,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:27:39,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:39,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:27:40,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:27:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:40,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:40,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59892054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:40,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:40,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-11-02 20:27:40,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937510995] [2022-11-02 20:27:40,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:27:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:27:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:27:40,559 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:27:40,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2018 transitions, 53694 flow. Second operand has 17 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 20:27:40,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:40,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:27:40,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:27:48,636 INFO L130 PetriNetUnfolder]: 2085/6369 cut-off events. [2022-11-02 20:27:48,637 INFO L131 PetriNetUnfolder]: For 139394/139426 co-relation queries the response was YES. [2022-11-02 20:27:48,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55692 conditions, 6369 events. 2085/6369 cut-off events. For 139394/139426 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63923 event pairs, 61 based on Foata normal form. 28/6384 useless extension candidates. Maximal degree in co-relation 55585. Up to 1284 conditions per place. [2022-11-02 20:27:48,811 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 688 selfloop transitions, 1390 changer transitions 3/2136 dead transitions. [2022-11-02 20:27:48,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2136 transitions, 61193 flow [2022-11-02 20:27:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:27:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:27:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2170 transitions. [2022-11-02 20:27:48,822 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7828282828282829 [2022-11-02 20:27:48,822 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2170 transitions. [2022-11-02 20:27:48,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2170 transitions. [2022-11-02 20:27:48,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:27:48,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2170 transitions. [2022-11-02 20:27:48,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 65.75757575757575) internal successors, (2170), 33 states have internal predecessors, (2170), 0 states have call successors, (0), 0 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 20:27:48,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 20:27:48,843 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 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 20:27:48,843 INFO L175 Difference]: Start difference. First operand has 461 places, 2018 transitions, 53694 flow. Second operand 33 states and 2170 transitions. [2022-11-02 20:27:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2136 transitions, 61193 flow [2022-11-02 20:27:51,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2136 transitions, 60725 flow, removed 78 selfloop flow, removed 20 redundant places. [2022-11-02 20:27:51,587 INFO L231 Difference]: Finished difference. Result has 478 places, 2113 transitions, 60700 flow [2022-11-02 20:27:51,590 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=53052, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=60700, PETRI_PLACES=478, PETRI_TRANSITIONS=2113} [2022-11-02 20:27:51,591 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 404 predicate places. [2022-11-02 20:27:51,591 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 2113 transitions, 60700 flow [2022-11-02 20:27:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 20:27:51,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:27:51,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:51,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:27:51,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:27:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 45309753, now seen corresponding path program 11 times [2022-11-02 20:27:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:51,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234648858] [2022-11-02 20:27:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:51,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:52,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234648858] [2022-11-02 20:27:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234648858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661710423] [2022-11-02 20:27:52,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:27:52,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:52,158 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:27:52,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:27:52,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:52,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:27:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:52,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:53,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661710423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:53,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:53,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 21 [2022-11-02 20:27:53,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726134138] [2022-11-02 20:27:53,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:53,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:27:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:27:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:27:53,253 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-11-02 20:27:53,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 2113 transitions, 60700 flow. Second operand has 21 states, 21 states have (on average 59.19047619047619) internal successors, (1243), 21 states have internal predecessors, (1243), 0 states have call successors, (0), 0 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 20:27:53,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:27:53,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-11-02 20:27:53,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:28:05,087 INFO L130 PetriNetUnfolder]: 2450/7228 cut-off events. [2022-11-02 20:28:05,087 INFO L131 PetriNetUnfolder]: For 183276/183276 co-relation queries the response was YES. [2022-11-02 20:28:05,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68919 conditions, 7228 events. 2450/7228 cut-off events. For 183276/183276 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72798 event pairs, 68 based on Foata normal form. 1/7221 useless extension candidates. Maximal degree in co-relation 68804. Up to 1501 conditions per place. [2022-11-02 20:28:05,302 INFO L137 encePairwiseOnDemand]: 70/84 looper letters, 760 selfloop transitions, 1613 changer transitions 5/2423 dead transitions. [2022-11-02 20:28:05,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 2423 transitions, 73251 flow [2022-11-02 20:28:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:28:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 20:28:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2793 transitions. [2022-11-02 20:28:05,309 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2022-11-02 20:28:05,309 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2793 transitions. [2022-11-02 20:28:05,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2793 transitions. [2022-11-02 20:28:05,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:28:05,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2793 transitions. [2022-11-02 20:28:05,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 60.71739130434783) internal successors, (2793), 46 states have internal predecessors, (2793), 0 states have call successors, (0), 0 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 20:28:05,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 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 20:28:05,326 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 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 20:28:05,326 INFO L175 Difference]: Start difference. First operand has 478 places, 2113 transitions, 60700 flow. Second operand 46 states and 2793 transitions. [2022-11-02 20:28:05,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 2423 transitions, 73251 flow [2022-11-02 20:28:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2423 transitions, 71793 flow, removed 43 selfloop flow, removed 17 redundant places. [2022-11-02 20:28:09,277 INFO L231 Difference]: Finished difference. Result has 518 places, 2365 transitions, 72133 flow [2022-11-02 20:28:09,279 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=59455, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=72133, PETRI_PLACES=518, PETRI_TRANSITIONS=2365} [2022-11-02 20:28:09,280 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 444 predicate places. [2022-11-02 20:28:09,280 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 2365 transitions, 72133 flow [2022-11-02 20:28:09,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.19047619047619) internal successors, (1243), 21 states have internal predecessors, (1243), 0 states have call successors, (0), 0 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 20:28:09,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:28:09,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:09,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:09,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:28:09,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:28:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1918841427, now seen corresponding path program 12 times [2022-11-02 20:28:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929207333] [2022-11-02 20:28:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:09,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929207333] [2022-11-02 20:28:09,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929207333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316227405] [2022-11-02 20:28:09,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:28:09,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:09,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:09,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:28:10,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:28:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:10,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:28:10,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:10,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:10,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316227405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:10,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:10,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-11-02 20:28:10,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033793114] [2022-11-02 20:28:10,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:28:10,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:28:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:28:10,679 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:28:10,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 2365 transitions, 72133 flow. Second operand has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 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 20:28:10,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:28:10,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:28:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:28:22,816 INFO L130 PetriNetUnfolder]: 2407/7285 cut-off events. [2022-11-02 20:28:22,817 INFO L131 PetriNetUnfolder]: For 205255/205266 co-relation queries the response was YES. [2022-11-02 20:28:23,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74482 conditions, 7285 events. 2407/7285 cut-off events. For 205255/205266 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 74545 event pairs, 150 based on Foata normal form. 7/7277 useless extension candidates. Maximal degree in co-relation 74351. Up to 1463 conditions per place. [2022-11-02 20:28:23,207 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 450 selfloop transitions, 2076 changer transitions 17/2607 dead transitions. [2022-11-02 20:28:23,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 2607 transitions, 84283 flow [2022-11-02 20:28:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 20:28:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-02 20:28:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3275 transitions. [2022-11-02 20:28:23,215 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2022-11-02 20:28:23,215 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3275 transitions. [2022-11-02 20:28:23,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3275 transitions. [2022-11-02 20:28:23,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:28:23,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3275 transitions. [2022-11-02 20:28:23,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 65.5) internal successors, (3275), 50 states have internal predecessors, (3275), 0 states have call successors, (0), 0 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 20:28:23,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 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 20:28:23,233 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 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 20:28:23,233 INFO L175 Difference]: Start difference. First operand has 518 places, 2365 transitions, 72133 flow. Second operand 50 states and 3275 transitions. [2022-11-02 20:28:23,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 2607 transitions, 84283 flow [2022-11-02 20:28:27,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2607 transitions, 83454 flow, removed 185 selfloop flow, removed 11 redundant places. [2022-11-02 20:28:27,790 INFO L231 Difference]: Finished difference. Result has 563 places, 2567 transitions, 84882 flow [2022-11-02 20:28:27,791 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=71351, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=84882, PETRI_PLACES=563, PETRI_TRANSITIONS=2567} [2022-11-02 20:28:27,792 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 489 predicate places. [2022-11-02 20:28:27,792 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 2567 transitions, 84882 flow [2022-11-02 20:28:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 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 20:28:27,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:28:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:27,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:28:28,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:28:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1810851501, now seen corresponding path program 13 times [2022-11-02 20:28:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:28,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45011605] [2022-11-02 20:28:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:28,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:28,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45011605] [2022-11-02 20:28:28,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45011605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:28,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450095488] [2022-11-02 20:28:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:28:28,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:28,381 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:28,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:28:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:28:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:28,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:29,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450095488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:29,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:29,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 20:28:29,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391201067] [2022-11-02 20:28:29,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:29,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:28:29,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:28:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:28:29,009 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:28:29,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2567 transitions, 84882 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 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 20:28:29,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:28:29,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:28:29,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:28:41,449 INFO L130 PetriNetUnfolder]: 2497/7611 cut-off events. [2022-11-02 20:28:41,449 INFO L131 PetriNetUnfolder]: For 249655/249669 co-relation queries the response was YES. [2022-11-02 20:28:41,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82748 conditions, 7611 events. 2497/7611 cut-off events. For 249655/249669 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 78636 event pairs, 57 based on Foata normal form. 11/7608 useless extension candidates. Maximal degree in co-relation 82608. Up to 1509 conditions per place. [2022-11-02 20:28:41,703 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 655 selfloop transitions, 2054 changer transitions 6/2779 dead transitions. [2022-11-02 20:28:41,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 2779 transitions, 96200 flow [2022-11-02 20:28:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:28:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 20:28:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2501 transitions. [2022-11-02 20:28:41,708 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7835213032581454 [2022-11-02 20:28:41,708 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2501 transitions. [2022-11-02 20:28:41,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2501 transitions. [2022-11-02 20:28:41,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:28:41,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2501 transitions. [2022-11-02 20:28:41,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.8157894736842) internal successors, (2501), 38 states have internal predecessors, (2501), 0 states have call successors, (0), 0 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 20:28:41,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 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 20:28:41,722 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 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 20:28:41,722 INFO L175 Difference]: Start difference. First operand has 563 places, 2567 transitions, 84882 flow. Second operand 38 states and 2501 transitions. [2022-11-02 20:28:41,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 2779 transitions, 96200 flow [2022-11-02 20:28:46,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 2779 transitions, 95094 flow, removed 57 selfloop flow, removed 20 redundant places. [2022-11-02 20:28:47,089 INFO L231 Difference]: Finished difference. Result has 585 places, 2742 transitions, 96606 flow [2022-11-02 20:28:47,091 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=83775, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1876, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=96606, PETRI_PLACES=585, PETRI_TRANSITIONS=2742} [2022-11-02 20:28:47,092 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 511 predicate places. [2022-11-02 20:28:47,092 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 2742 transitions, 96606 flow [2022-11-02 20:28:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 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 20:28:47,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:28:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:47,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:47,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:28:47,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:28:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash 218778757, now seen corresponding path program 14 times [2022-11-02 20:28:47,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089013214] [2022-11-02 20:28:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:47,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089013214] [2022-11-02 20:28:47,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089013214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:47,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541525975] [2022-11-02 20:28:47,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:28:47,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:47,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:47,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:28:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:28:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:28:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541525975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:48,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-02 20:28:48,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119700320] [2022-11-02 20:28:48,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:48,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:28:48,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:28:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:28:48,565 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:28:48,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 2742 transitions, 96606 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 20:28:48,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:28:48,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:28:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:29:02,323 INFO L130 PetriNetUnfolder]: 2570/7792 cut-off events. [2022-11-02 20:29:02,324 INFO L131 PetriNetUnfolder]: For 297629/297656 co-relation queries the response was YES. [2022-11-02 20:29:02,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90188 conditions, 7792 events. 2570/7792 cut-off events. For 297629/297656 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 80664 event pairs, 59 based on Foata normal form. 13/7790 useless extension candidates. Maximal degree in co-relation 90040. Up to 1514 conditions per place. [2022-11-02 20:29:02,553 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 395 selfloop transitions, 2396 changer transitions 6/2861 dead transitions. [2022-11-02 20:29:02,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 2861 transitions, 105549 flow [2022-11-02 20:29:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 20:29:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-02 20:29:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-11-02 20:29:02,559 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-11-02 20:29:02,559 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-11-02 20:29:02,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-11-02 20:29:02,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:29:02,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-11-02 20:29:02,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 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 20:29:02,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 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 20:29:02,573 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 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 20:29:02,573 INFO L175 Difference]: Start difference. First operand has 585 places, 2742 transitions, 96606 flow. Second operand 40 states and 2634 transitions. [2022-11-02 20:29:02,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 2861 transitions, 105549 flow [2022-11-02 20:29:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 2861 transitions, 103576 flow, removed 209 selfloop flow, removed 19 redundant places. [2022-11-02 20:29:09,013 INFO L231 Difference]: Finished difference. Result has 608 places, 2810 transitions, 105026 flow [2022-11-02 20:29:09,015 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=94376, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=105026, PETRI_PLACES=608, PETRI_TRANSITIONS=2810} [2022-11-02 20:29:09,015 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 534 predicate places. [2022-11-02 20:29:09,016 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 2810 transitions, 105026 flow [2022-11-02 20:29:09,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 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 20:29:09,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:29:09,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:09,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:09,217 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:29:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash -864032639, now seen corresponding path program 15 times [2022-11-02 20:29:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:09,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842700139] [2022-11-02 20:29:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:09,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842700139] [2022-11-02 20:29:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842700139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323444742] [2022-11-02 20:29:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:29:09,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:09,632 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:09,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:29:09,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:29:09,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:29:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:29:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:10,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:10,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323444742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:10,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:10,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-02 20:29:10,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340627241] [2022-11-02 20:29:10,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:10,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:29:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:29:10,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:29:10,648 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:29:10,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 2810 transitions, 105026 flow. Second operand has 20 states, 20 states have (on average 64.45) internal successors, (1289), 20 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 20:29:10,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:29:10,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:29:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:29:26,518 INFO L130 PetriNetUnfolder]: 2843/8410 cut-off events. [2022-11-02 20:29:26,518 INFO L131 PetriNetUnfolder]: For 367312/367322 co-relation queries the response was YES. [2022-11-02 20:29:26,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105196 conditions, 8410 events. 2843/8410 cut-off events. For 367312/367322 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87521 event pairs, 70 based on Foata normal form. 41/8432 useless extension candidates. Maximal degree in co-relation 105041. Up to 2403 conditions per place. [2022-11-02 20:29:26,846 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 1135 selfloop transitions, 2050 changer transitions 1/3250 dead transitions. [2022-11-02 20:29:26,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 3250 transitions, 127776 flow [2022-11-02 20:29:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:29:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:29:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2253 transitions. [2022-11-02 20:29:26,851 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7888655462184874 [2022-11-02 20:29:26,852 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2253 transitions. [2022-11-02 20:29:26,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2253 transitions. [2022-11-02 20:29:26,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:29:26,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2253 transitions. [2022-11-02 20:29:26,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.26470588235294) internal successors, (2253), 34 states have internal predecessors, (2253), 0 states have call successors, (0), 0 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 20:29:26,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 20:29:26,865 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 20:29:26,866 INFO L175 Difference]: Start difference. First operand has 608 places, 2810 transitions, 105026 flow. Second operand 34 states and 2253 transitions. [2022-11-02 20:29:26,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 3250 transitions, 127776 flow [2022-11-02 20:29:35,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 3250 transitions, 126476 flow, removed 169 selfloop flow, removed 17 redundant places. [2022-11-02 20:29:35,539 INFO L231 Difference]: Finished difference. Result has 642 places, 3109 transitions, 124093 flow [2022-11-02 20:29:35,541 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=103879, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1788, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=124093, PETRI_PLACES=642, PETRI_TRANSITIONS=3109} [2022-11-02 20:29:35,541 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 568 predicate places. [2022-11-02 20:29:35,542 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 3109 transitions, 124093 flow [2022-11-02 20:29:35,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.45) internal successors, (1289), 20 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 20:29:35,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:29:35,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:35,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:35,744 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:29:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2138348637, now seen corresponding path program 16 times [2022-11-02 20:29:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98244189] [2022-11-02 20:29:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:36,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98244189] [2022-11-02 20:29:36,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98244189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498983] [2022-11-02 20:29:36,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:29:36,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:36,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:36,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:29:36,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:29:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:29:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:29:36,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:36,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:36,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:36,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:36,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-02 20:29:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151530027] [2022-11-02 20:29:36,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:29:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:29:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:29:36,813 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:29:36,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 3109 transitions, 124093 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 20:29:36,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:29:36,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:29:36,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:29:55,085 INFO L130 PetriNetUnfolder]: 2846/8418 cut-off events. [2022-11-02 20:29:55,085 INFO L131 PetriNetUnfolder]: For 428820/428832 co-relation queries the response was YES. [2022-11-02 20:29:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110385 conditions, 8418 events. 2846/8418 cut-off events. For 428820/428832 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 87632 event pairs, 137 based on Foata normal form. 7/8403 useless extension candidates. Maximal degree in co-relation 110209. Up to 2305 conditions per place. [2022-11-02 20:29:55,407 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1257 selfloop transitions, 1835 changer transitions 4/3160 dead transitions. [2022-11-02 20:29:55,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 3160 transitions, 131981 flow [2022-11-02 20:29:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:29:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 20:29:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1122 transitions. [2022-11-02 20:29:55,410 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-11-02 20:29:55,410 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1122 transitions. [2022-11-02 20:29:55,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1122 transitions. [2022-11-02 20:29:55,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:29:55,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1122 transitions. [2022-11-02 20:29:55,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 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 20:29:55,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 84.0) internal successors, (1512), 18 states have internal predecessors, (1512), 0 states have call successors, (0), 0 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 20:29:55,414 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 84.0) internal successors, (1512), 18 states have internal predecessors, (1512), 0 states have call successors, (0), 0 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 20:29:55,414 INFO L175 Difference]: Start difference. First operand has 642 places, 3109 transitions, 124093 flow. Second operand 17 states and 1122 transitions. [2022-11-02 20:29:55,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 3160 transitions, 131981 flow [2022-11-02 20:30:06,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 3160 transitions, 130637 flow, removed 430 selfloop flow, removed 3 redundant places. [2022-11-02 20:30:06,228 INFO L231 Difference]: Finished difference. Result has 662 places, 3130 transitions, 129861 flow [2022-11-02 20:30:06,233 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=122749, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=129861, PETRI_PLACES=662, PETRI_TRANSITIONS=3130} [2022-11-02 20:30:06,233 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 588 predicate places. [2022-11-02 20:30:06,233 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 3130 transitions, 129861 flow [2022-11-02 20:30:06,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 20:30:06,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:30:06,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:06,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:06,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:06,435 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:30:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2065230877, now seen corresponding path program 17 times [2022-11-02 20:30:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:06,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590043539] [2022-11-02 20:30:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:06,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590043539] [2022-11-02 20:30:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590043539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394950548] [2022-11-02 20:30:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:30:06,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:06,748 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ea978e5-665f-43c6-830e-d1b22845a591/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:30:06,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:30:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:06,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:30:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:07,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394950548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:07,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:07,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-02 20:30:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458393800] [2022-11-02 20:30:07,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:30:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:30:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:30:07,474 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-02 20:30:07,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 3130 transitions, 129861 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 20:30:07,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:30:07,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-02 20:30:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand