./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF --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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:01:51,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:01:51,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:01:51,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:01:51,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:01:51,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:01:51,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:01:51,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:01:51,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:01:51,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:01:51,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:01:51,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:01:51,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:01:51,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:01:51,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:01:51,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:01:51,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:01:51,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:01:51,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:01:51,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:01:51,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:01:51,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:01:51,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:01:51,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:01:51,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:01:51,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:01:51,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:01:51,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:01:51,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:01:51,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:01:51,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:01:51,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:01:51,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:01:51,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:01:51,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:01:51,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:01:51,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:01:51,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:01:51,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:01:51,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:01:51,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:01:51,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:01:51,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:01:51,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:01:51,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:01:51,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:01:51,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:01:51,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:01:51,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:01:51,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:01:51,729 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:01:51,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:01:51,730 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:01:51,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:01:51,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:01:51,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:01:51,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:01:51,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:01:51,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:01:51,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:01:51,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:01:51,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:01:51,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:01:51,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:01:51,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:01:51,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:01:51,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:01:51,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:01:51,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:01:51,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:01:51,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:01:51,734 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_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2021-11-20 06:01:51,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:01:52,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:01:52,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:01:52,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:01:52,011 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:01:52,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-20 06:01:52,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/data/258c15239/a5b2691a1a224029977b7412dacd9435/FLAG6f3e45172 [2021-11-20 06:01:52,526 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:01:52,526 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-11-20 06:01:52,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/data/258c15239/a5b2691a1a224029977b7412dacd9435/FLAG6f3e45172 [2021-11-20 06:01:52,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/data/258c15239/a5b2691a1a224029977b7412dacd9435 [2021-11-20 06:01:52,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:01:52,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:01:52,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:01:52,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:01:52,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:01:52,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:01:52" (1/1) ... [2021-11-20 06:01:52,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4070ed65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:52, skipping insertion in model container [2021-11-20 06:01:52,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:01:52" (1/1) ... [2021-11-20 06:01:52,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:01:52,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:01:53,238 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_2f030c6f-1135-4c61-aa1a-47c21f0b173b/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-20 06:01:53,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:01:53,261 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:01:53,285 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_2f030c6f-1135-4c61-aa1a-47c21f0b173b/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-11-20 06:01:53,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:01:53,303 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:01:53,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53 WrapperNode [2021-11-20 06:01:53,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:01:53,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:01:53,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:01:53,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:01:53,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,359 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2021-11-20 06:01:53,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:01:53,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:01:53,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:01:53,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:01:53,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:01:53,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:01:53,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:01:53,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:01:53,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (1/1) ... [2021-11-20 06:01:53,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:01:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:53,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:01:53,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:01:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:01:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:01:53,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:01:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:01:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:01:53,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:01:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:01:53,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:01:53,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:01:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 06:01:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 06:01:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:01:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:01:53,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:01:53,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:01:53,470 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:01:53,557 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:01:53,559 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:01:53,884 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:01:53,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:01:53,983 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:01:53,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:01:53 BoogieIcfgContainer [2021-11-20 06:01:53,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:01:53,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:01:53,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:01:53,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:01:53,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:01:52" (1/3) ... [2021-11-20 06:01:54,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f6677c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:01:54, skipping insertion in model container [2021-11-20 06:01:54,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:53" (2/3) ... [2021-11-20 06:01:54,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f6677c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:01:54, skipping insertion in model container [2021-11-20 06:01:54,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:01:53" (3/3) ... [2021-11-20 06:01:54,007 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2021-11-20 06:01:54,014 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:01:54,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:01:54,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:01:54,015 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:01:54,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,069 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,069 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,069 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,069 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,070 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,070 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,071 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,072 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,073 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,073 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,073 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,073 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,078 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:01:54,087 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:01:54,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:01:54,144 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:01:54,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:01:54,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2021-11-20 06:01:54,252 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2021-11-20 06:01:54,252 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:01:54,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2021-11-20 06:01:54,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2021-11-20 06:01:54,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2021-11-20 06:01:54,301 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2021-11-20 06:01:54,301 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:01:54,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:54,302 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:54,303 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2021-11-20 06:01:54,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582699465] [2021-11-20 06:01:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:54,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:54,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:54,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582699465] [2021-11-20 06:01:54,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582699465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:54,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:54,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:01:54,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257317191] [2021-11-20 06:01:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:54,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:01:54,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:01:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:01:54,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2021-11-20 06:01:54,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:54,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:54,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2021-11-20 06:01:54,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:54,723 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2021-11-20 06:01:54,723 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-11-20 06:01:54,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2021-11-20 06:01:54,727 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2021-11-20 06:01:54,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2021-11-20 06:01:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:01:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:01:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2021-11-20 06:01:54,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2021-11-20 06:01:54,742 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2021-11-20 06:01:54,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2021-11-20 06:01:54,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:54,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2021-11-20 06:01:54,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:54,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:54,768 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:54,770 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2021-11-20 06:01:54,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2021-11-20 06:01:54,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:01:54,789 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2021-11-20 06:01:54,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2021-11-20 06:01:54,798 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2021-11-20 06:01:54,799 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2021-11-20 06:01:54,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:54,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:54,800 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:54,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:01:54,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1518951431, now seen corresponding path program 1 times [2021-11-20 06:01:54,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:54,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14855997] [2021-11-20 06:01:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:54,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:55,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14855997] [2021-11-20 06:01:55,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14855997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:55,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:01:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003604970] [2021-11-20 06:01:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:55,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:01:55,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:01:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:01:55,108 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2021-11-20 06:01:55,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:55,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2021-11-20 06:01:55,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:55,300 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2021-11-20 06:01:55,300 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 06:01:55,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 294 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2021-11-20 06:01:55,305 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2021-11-20 06:01:55,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2021-11-20 06:01:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 06:01:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2021-11-20 06:01:55,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2021-11-20 06:01:55,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2021-11-20 06:01:55,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2021-11-20 06:01:55,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:55,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2021-11-20 06:01:55,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,337 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,338 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2021-11-20 06:01:55,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2021-11-20 06:01:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:01:55,348 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2021-11-20 06:01:55,348 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2021-11-20 06:01:55,349 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2021-11-20 06:01:55,350 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2021-11-20 06:01:55,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:55,351 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:55,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:01:55,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:55,353 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2021-11-20 06:01:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:55,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377719329] [2021-11-20 06:01:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:55,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:01:55,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377719329] [2021-11-20 06:01:55,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377719329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:55,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:55,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:01:55,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852321222] [2021-11-20 06:01:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:01:55,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:01:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:01:55,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2021-11-20 06:01:55,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:55,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2021-11-20 06:01:55,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:55,669 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2021-11-20 06:01:55,669 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-20 06:01:55,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 163 events. 12/163 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 213. Up to 22 conditions per place. [2021-11-20 06:01:55,673 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 11 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2021-11-20 06:01:55,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 313 flow [2021-11-20 06:01:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:01:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:01:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2021-11-20 06:01:55,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2021-11-20 06:01:55,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2021-11-20 06:01:55,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2021-11-20 06:01:55,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:55,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2021-11-20 06:01:55,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,680 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 390 transitions. [2021-11-20 06:01:55,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 313 flow [2021-11-20 06:01:55,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:01:55,685 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 287 flow [2021-11-20 06:01:55,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2021-11-20 06:01:55,687 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2021-11-20 06:01:55,687 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 287 flow [2021-11-20 06:01:55,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:55,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:55,688 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:55,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:01:55,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2021-11-20 06:01:55,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:55,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906193392] [2021-11-20 06:01:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:55,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:01:56,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906193392] [2021-11-20 06:01:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906193392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:56,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:01:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209525060] [2021-11-20 06:01:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:01:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:01:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:56,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:01:56,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 287 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:56,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:56,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:01:56,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:57,075 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2021-11-20 06:01:57,075 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2021-11-20 06:01:57,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 413 events. 120/413 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1611 event pairs, 19 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 800. Up to 174 conditions per place. [2021-11-20 06:01:57,080 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2021-11-20 06:01:57,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 598 flow [2021-11-20 06:01:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:01:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-20 06:01:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2021-11-20 06:01:57,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2021-11-20 06:01:57,087 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2021-11-20 06:01:57,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2021-11-20 06:01:57,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:57,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2021-11-20 06:01:57,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:57,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:57,105 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:57,106 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 287 flow. Second operand 17 states and 1605 transitions. [2021-11-20 06:01:57,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 598 flow [2021-11-20 06:01:57,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 570 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-11-20 06:01:57,115 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 391 flow [2021-11-20 06:01:57,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=391, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2021-11-20 06:01:57,118 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2021-11-20 06:01:57,118 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 391 flow [2021-11-20 06:01:57,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:57,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:57,119 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:57,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:01:57,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2017920004, now seen corresponding path program 3 times [2021-11-20 06:01:57,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489504752] [2021-11-20 06:01:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:57,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:01:57,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489504752] [2021-11-20 06:01:57,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489504752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:57,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:57,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:01:57,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636385753] [2021-11-20 06:01:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:01:57,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:01:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:57,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:01:57,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:57,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:57,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:01:57,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:58,336 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2021-11-20 06:01:58,336 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2021-11-20 06:01:58,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2163 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1051. Up to 172 conditions per place. [2021-11-20 06:01:58,343 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2021-11-20 06:01:58,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 751 flow [2021-11-20 06:01:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:01:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 06:01:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2021-11-20 06:01:58,351 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-11-20 06:01:58,351 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2021-11-20 06:01:58,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2021-11-20 06:01:58,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:58,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2021-11-20 06:01:58,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:58,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:58,382 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:58,382 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 391 flow. Second operand 18 states and 1701 transitions. [2021-11-20 06:01:58,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 751 flow [2021-11-20 06:01:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 731 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-11-20 06:01:58,398 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 478 flow [2021-11-20 06:01:58,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2021-11-20 06:01:58,402 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2021-11-20 06:01:58,402 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 478 flow [2021-11-20 06:01:58,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:58,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:58,412 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:58,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:01:58,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1240418182, now seen corresponding path program 4 times [2021-11-20 06:01:58,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026270408] [2021-11-20 06:01:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:58,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:01:58,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:58,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026270408] [2021-11-20 06:01:58,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026270408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:58,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:58,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:01:58,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262611134] [2021-11-20 06:01:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:58,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:01:58,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:01:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:59,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:01:59,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:59,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:01:59,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:01:59,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:01:59,500 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2021-11-20 06:01:59,501 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-11-20 06:01:59,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2536 event pairs, 46 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1319. Up to 229 conditions per place. [2021-11-20 06:01:59,507 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2021-11-20 06:01:59,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 897 flow [2021-11-20 06:01:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:01:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:01:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2021-11-20 06:01:59,515 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2021-11-20 06:01:59,516 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2021-11-20 06:01:59,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2021-11-20 06:01:59,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:01:59,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2021-11-20 06:01:59,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:59,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:59,530 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:59,530 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 478 flow. Second operand 16 states and 1517 transitions. [2021-11-20 06:01:59,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 897 flow [2021-11-20 06:01:59,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 809 flow, removed 26 selfloop flow, removed 12 redundant places. [2021-11-20 06:01:59,540 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 611 flow [2021-11-20 06:01:59,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2021-11-20 06:01:59,542 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2021-11-20 06:01:59,542 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 611 flow [2021-11-20 06:01:59,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:59,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:01:59,543 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:01:59,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:01:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2118618490, now seen corresponding path program 5 times [2021-11-20 06:01:59,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:59,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016743499] [2021-11-20 06:01:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:59,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:00,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016743499] [2021-11-20 06:02:00,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016743499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:00,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:00,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:00,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189641058] [2021-11-20 06:02:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:00,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:00,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:00,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:00,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 611 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:00,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:00,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:00,496 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2021-11-20 06:02:00,497 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2021-11-20 06:02:00,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2692 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1504. Up to 241 conditions per place. [2021-11-20 06:02:00,504 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2021-11-20 06:02:00,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1073 flow [2021-11-20 06:02:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2021-11-20 06:02:00,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2021-11-20 06:02:00,511 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2021-11-20 06:02:00,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2021-11-20 06:02:00,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:00,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2021-11-20 06:02:00,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,524 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,525 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 611 flow. Second operand 16 states and 1519 transitions. [2021-11-20 06:02:00,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1073 flow [2021-11-20 06:02:00,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1012 flow, removed 15 selfloop flow, removed 9 redundant places. [2021-11-20 06:02:00,536 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 811 flow [2021-11-20 06:02:00,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=811, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2021-11-20 06:02:00,537 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2021-11-20 06:02:00,537 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 811 flow [2021-11-20 06:02:00,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:00,539 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:02:00,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 496787528, now seen corresponding path program 6 times [2021-11-20 06:02:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257348113] [2021-11-20 06:02:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:00,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:00,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:00,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257348113] [2021-11-20 06:02:00,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257348113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:00,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:00,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:00,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141365657] [2021-11-20 06:02:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:00,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:00,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:00,939 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:00,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 811 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:00,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:00,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:00,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:01,374 INFO L129 PetriNetUnfolder]: 146/548 cut-off events. [2021-11-20 06:02:01,374 INFO L130 PetriNetUnfolder]: For 1225/1225 co-relation queries the response was YES. [2021-11-20 06:02:01,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 548 events. 146/548 cut-off events. For 1225/1225 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2832 event pairs, 47 based on Foata normal form. 1/539 useless extension candidates. Maximal degree in co-relation 1653. Up to 255 conditions per place. [2021-11-20 06:02:01,383 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2021-11-20 06:02:01,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1182 flow [2021-11-20 06:02:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2021-11-20 06:02:01,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-11-20 06:02:01,390 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2021-11-20 06:02:01,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2021-11-20 06:02:01,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:01,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2021-11-20 06:02:01,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 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) [2021-11-20 06:02:01,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:01,405 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:01,405 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 811 flow. Second operand 16 states and 1512 transitions. [2021-11-20 06:02:01,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1182 flow [2021-11-20 06:02:01,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1101 flow, removed 36 selfloop flow, removed 7 redundant places. [2021-11-20 06:02:01,421 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 828 flow [2021-11-20 06:02:01,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2021-11-20 06:02:01,424 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2021-11-20 06:02:01,424 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 828 flow [2021-11-20 06:02:01,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:01,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:01,426 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:01,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:02:01,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:01,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1236715240, now seen corresponding path program 7 times [2021-11-20 06:02:01,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71672581] [2021-11-20 06:02:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:01,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71672581] [2021-11-20 06:02:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71672581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:01,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:01,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:01,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690727965] [2021-11-20 06:02:01,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:01,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:01,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:01,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:01,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 828 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:01,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:01,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:01,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:02,399 INFO L129 PetriNetUnfolder]: 149/557 cut-off events. [2021-11-20 06:02:02,400 INFO L130 PetriNetUnfolder]: For 1358/1358 co-relation queries the response was YES. [2021-11-20 06:02:02,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1717 conditions, 557 events. 149/557 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2884 event pairs, 51 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 1687. Up to 255 conditions per place. [2021-11-20 06:02:02,408 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2021-11-20 06:02:02,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1208 flow [2021-11-20 06:02:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-11-20 06:02:02,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-11-20 06:02:02,417 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-11-20 06:02:02,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-11-20 06:02:02,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:02,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-11-20 06:02:02,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:02,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:02,432 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:02,432 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 828 flow. Second operand 16 states and 1514 transitions. [2021-11-20 06:02:02,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1208 flow [2021-11-20 06:02:02,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1137 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-11-20 06:02:02,447 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 851 flow [2021-11-20 06:02:02,447 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=851, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2021-11-20 06:02:02,448 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2021-11-20 06:02:02,449 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 851 flow [2021-11-20 06:02:02,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:02,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:02,450 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:02,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:02:02,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1955741590, now seen corresponding path program 8 times [2021-11-20 06:02:02,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:02,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937914025] [2021-11-20 06:02:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:02,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:02,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937914025] [2021-11-20 06:02:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937914025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:02,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:02,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:02,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743583891] [2021-11-20 06:02:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:02,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:02,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 851 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:02,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:02,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:02,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:03,378 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2021-11-20 06:02:03,378 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2021-11-20 06:02:03,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3052 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1783. Up to 247 conditions per place. [2021-11-20 06:02:03,386 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2021-11-20 06:02:03,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1281 flow [2021-11-20 06:02:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:02:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-20 06:02:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2021-11-20 06:02:03,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2021-11-20 06:02:03,393 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2021-11-20 06:02:03,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2021-11-20 06:02:03,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:03,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2021-11-20 06:02:03,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:03,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:03,423 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:03,424 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 851 flow. Second operand 17 states and 1607 transitions. [2021-11-20 06:02:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1281 flow [2021-11-20 06:02:03,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1197 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-11-20 06:02:03,438 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2021-11-20 06:02:03,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2021-11-20 06:02:03,440 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2021-11-20 06:02:03,440 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2021-11-20 06:02:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:03,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:03,441 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:03,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:02:03,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash -987092368, now seen corresponding path program 9 times [2021-11-20 06:02:03,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:03,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341872748] [2021-11-20 06:02:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:03,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:03,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:03,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341872748] [2021-11-20 06:02:03,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341872748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:03,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:03,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:03,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412010018] [2021-11-20 06:02:03,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:03,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:03,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:03,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:03,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 904 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:03,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:03,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:03,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:04,307 INFO L129 PetriNetUnfolder]: 154/572 cut-off events. [2021-11-20 06:02:04,307 INFO L130 PetriNetUnfolder]: For 1954/1954 co-relation queries the response was YES. [2021-11-20 06:02:04,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 572 events. 154/572 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3038 event pairs, 67 based on Foata normal form. 1/559 useless extension candidates. Maximal degree in co-relation 1856. Up to 275 conditions per place. [2021-11-20 06:02:04,316 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2021-11-20 06:02:04,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1342 flow [2021-11-20 06:02:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-11-20 06:02:04,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-11-20 06:02:04,320 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-11-20 06:02:04,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-11-20 06:02:04,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:04,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-11-20 06:02:04,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:04,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:04,329 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:04,330 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 16 states and 1514 transitions. [2021-11-20 06:02:04,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1342 flow [2021-11-20 06:02:04,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1230 flow, removed 24 selfloop flow, removed 13 redundant places. [2021-11-20 06:02:04,345 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 917 flow [2021-11-20 06:02:04,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=917, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2021-11-20 06:02:04,346 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2021-11-20 06:02:04,347 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 917 flow [2021-11-20 06:02:04,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:04,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:04,348 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:04,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:02:04,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1856771486, now seen corresponding path program 10 times [2021-11-20 06:02:04,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102606440] [2021-11-20 06:02:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:04,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:04,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102606440] [2021-11-20 06:02:04,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102606440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:04,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:04,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:04,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578322779] [2021-11-20 06:02:04,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:04,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:04,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:04,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:04,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 917 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:04,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:04,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:04,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:05,177 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2021-11-20 06:02:05,178 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2021-11-20 06:02:05,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3182 event pairs, 47 based on Foata normal form. 1/574 useless extension candidates. Maximal degree in co-relation 1876. Up to 275 conditions per place. [2021-11-20 06:02:05,187 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2021-11-20 06:02:05,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1344 flow [2021-11-20 06:02:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-11-20 06:02:05,191 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-11-20 06:02:05,191 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-11-20 06:02:05,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-11-20 06:02:05,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:05,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-11-20 06:02:05,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:05,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:05,201 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:05,201 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 917 flow. Second operand 16 states and 1516 transitions. [2021-11-20 06:02:05,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1344 flow [2021-11-20 06:02:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1266 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-11-20 06:02:05,218 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 941 flow [2021-11-20 06:02:05,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2021-11-20 06:02:05,220 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2021-11-20 06:02:05,220 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 941 flow [2021-11-20 06:02:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:05,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:05,221 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:05,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:02:05,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1058454566, now seen corresponding path program 11 times [2021-11-20 06:02:05,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:05,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182348887] [2021-11-20 06:02:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:05,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:05,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182348887] [2021-11-20 06:02:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182348887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:05,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:05,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:05,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153439677] [2021-11-20 06:02:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:05,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:05,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:05,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:05,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 941 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:05,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:05,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:05,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:06,218 INFO L129 PetriNetUnfolder]: 159/592 cut-off events. [2021-11-20 06:02:06,219 INFO L130 PetriNetUnfolder]: For 2371/2371 co-relation queries the response was YES. [2021-11-20 06:02:06,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 592 events. 159/592 cut-off events. For 2371/2371 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3217 event pairs, 73 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 1945. Up to 261 conditions per place. [2021-11-20 06:02:06,228 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2021-11-20 06:02:06,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1403 flow [2021-11-20 06:02:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:02:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-20 06:02:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2021-11-20 06:02:06,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2021-11-20 06:02:06,236 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2021-11-20 06:02:06,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2021-11-20 06:02:06,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:06,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2021-11-20 06:02:06,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:06,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:06,251 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:06,251 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 941 flow. Second operand 17 states and 1609 transitions. [2021-11-20 06:02:06,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1403 flow [2021-11-20 06:02:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1311 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-11-20 06:02:06,273 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 982 flow [2021-11-20 06:02:06,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=982, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2021-11-20 06:02:06,275 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2021-11-20 06:02:06,275 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 982 flow [2021-11-20 06:02:06,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:06,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:06,276 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:06,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:02:06,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash 391245110, now seen corresponding path program 12 times [2021-11-20 06:02:06,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:06,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749652469] [2021-11-20 06:02:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:06,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:06,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749652469] [2021-11-20 06:02:06,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749652469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:06,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:06,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:06,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669521146] [2021-11-20 06:02:06,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:06,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:06,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:06,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:06,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:06,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 982 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:06,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:06,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:06,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:07,160 INFO L129 PetriNetUnfolder]: 160/605 cut-off events. [2021-11-20 06:02:07,160 INFO L130 PetriNetUnfolder]: For 2779/2779 co-relation queries the response was YES. [2021-11-20 06:02:07,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 605 events. 160/605 cut-off events. For 2779/2779 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3366 event pairs, 57 based on Foata normal form. 1/593 useless extension candidates. Maximal degree in co-relation 2020. Up to 289 conditions per place. [2021-11-20 06:02:07,169 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2021-11-20 06:02:07,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1461 flow [2021-11-20 06:02:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-11-20 06:02:07,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-11-20 06:02:07,173 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-11-20 06:02:07,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-11-20 06:02:07,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:07,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-11-20 06:02:07,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:07,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:07,185 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:07,185 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 982 flow. Second operand 16 states and 1516 transitions. [2021-11-20 06:02:07,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1461 flow [2021-11-20 06:02:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1330 flow, removed 28 selfloop flow, removed 14 redundant places. [2021-11-20 06:02:07,205 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 987 flow [2021-11-20 06:02:07,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=987, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2021-11-20 06:02:07,207 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2021-11-20 06:02:07,207 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 987 flow [2021-11-20 06:02:07,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:07,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:07,208 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:07,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:02:07,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash 648877538, now seen corresponding path program 13 times [2021-11-20 06:02:07,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:07,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997392673] [2021-11-20 06:02:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:07,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:07,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997392673] [2021-11-20 06:02:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997392673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:07,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:07,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:02:07,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738910312] [2021-11-20 06:02:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:07,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:02:07,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:02:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:02:07,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-11-20 06:02:07,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 987 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:07,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:07,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-11-20 06:02:07,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:08,058 INFO L129 PetriNetUnfolder]: 163/611 cut-off events. [2021-11-20 06:02:08,058 INFO L130 PetriNetUnfolder]: For 2751/2751 co-relation queries the response was YES. [2021-11-20 06:02:08,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 611 events. 163/611 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3398 event pairs, 60 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 2028. Up to 289 conditions per place. [2021-11-20 06:02:08,067 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2021-11-20 06:02:08,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1453 flow [2021-11-20 06:02:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:02:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 06:02:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2021-11-20 06:02:08,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2021-11-20 06:02:08,071 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2021-11-20 06:02:08,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2021-11-20 06:02:08,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:08,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2021-11-20 06:02:08,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:08,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:08,081 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:08,081 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 987 flow. Second operand 16 states and 1518 transitions. [2021-11-20 06:02:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1453 flow [2021-11-20 06:02:08,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1366 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-11-20 06:02:08,101 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1012 flow [2021-11-20 06:02:08,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1012, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2021-11-20 06:02:08,103 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2021-11-20 06:02:08,103 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1012 flow [2021-11-20 06:02:08,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:08,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:08,104 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:02:08,104 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1703158908, now seen corresponding path program 1 times [2021-11-20 06:02:08,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:08,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912185433] [2021-11-20 06:02:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:02:08,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912185433] [2021-11-20 06:02:08,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912185433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972608018] [2021-11-20 06:02:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:08,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:08,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:02:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:02:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:09,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972608018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:09,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:09,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2021-11-20 06:02:09,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617015737] [2021-11-20 06:02:09,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:09,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:02:09,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:02:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:02:09,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 145 [2021-11-20 06:02:09,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1012 flow. Second operand has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:09,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:09,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 145 [2021-11-20 06:02:09,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:10,609 INFO L129 PetriNetUnfolder]: 69/764 cut-off events. [2021-11-20 06:02:10,609 INFO L130 PetriNetUnfolder]: For 5679/5817 co-relation queries the response was YES. [2021-11-20 06:02:10,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2281 conditions, 764 events. 69/764 cut-off events. For 5679/5817 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5096 event pairs, 8 based on Foata normal form. 94/848 useless extension candidates. Maximal degree in co-relation 2242. Up to 75 conditions per place. [2021-11-20 06:02:10,620 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 37 selfloop transitions, 23 changer transitions 39/205 dead transitions. [2021-11-20 06:02:10,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 205 transitions, 1189 flow [2021-11-20 06:02:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:02:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 06:02:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2154 transitions. [2021-11-20 06:02:10,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7818511796733212 [2021-11-20 06:02:10,624 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2154 transitions. [2021-11-20 06:02:10,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2154 transitions. [2021-11-20 06:02:10,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:10,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2154 transitions. [2021-11-20 06:02:10,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:10,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:10,636 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 145.0) internal successors, (2900), 20 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:10,637 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1012 flow. Second operand 19 states and 2154 transitions. [2021-11-20 06:02:10,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 205 transitions, 1189 flow [2021-11-20 06:02:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 205 transitions, 1095 flow, removed 3 selfloop flow, removed 19 redundant places. [2021-11-20 06:02:10,656 INFO L242 Difference]: Finished difference. Result has 217 places, 146 transitions, 631 flow [2021-11-20 06:02:10,656 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=631, PETRI_PLACES=217, PETRI_TRANSITIONS=146} [2021-11-20 06:02:10,657 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 87 predicate places. [2021-11-20 06:02:10,657 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 146 transitions, 631 flow [2021-11-20 06:02:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.95454545454545) internal successors, (2485), 22 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:10,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:10,659 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:10,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:10,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:02:10,886 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1913345623, now seen corresponding path program 1 times [2021-11-20 06:02:10,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:10,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627494677] [2021-11-20 06:02:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:10,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:10,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627494677] [2021-11-20 06:02:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627494677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618175357] [2021-11-20 06:02:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:10,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:11,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:02:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:02:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:11,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618175357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:11,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:11,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-20 06:02:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476835003] [2021-11-20 06:02:11,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:11,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:02:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:02:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:02:11,769 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2021-11-20 06:02:11,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 146 transitions, 631 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:11,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:11,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2021-11-20 06:02:11,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:12,038 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2021-11-20 06:02:12,039 INFO L130 PetriNetUnfolder]: For 2322/2374 co-relation queries the response was YES. [2021-11-20 06:02:12,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 411 events. 40/411 cut-off events. For 2322/2374 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1510 event pairs, 11 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 1163. Up to 58 conditions per place. [2021-11-20 06:02:12,044 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2021-11-20 06:02:12,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 153 transitions, 742 flow [2021-11-20 06:02:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:02:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:02:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2021-11-20 06:02:12,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-11-20 06:02:12,047 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2021-11-20 06:02:12,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2021-11-20 06:02:12,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:12,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2021-11-20 06:02:12,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:12,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:12,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:12,055 INFO L186 Difference]: Start difference. First operand has 217 places, 146 transitions, 631 flow. Second operand 12 states and 1385 transitions. [2021-11-20 06:02:12,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 153 transitions, 742 flow [2021-11-20 06:02:12,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 153 transitions, 575 flow, removed 62 selfloop flow, removed 31 redundant places. [2021-11-20 06:02:12,066 INFO L242 Difference]: Finished difference. Result has 168 places, 143 transitions, 476 flow [2021-11-20 06:02:12,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2021-11-20 06:02:12,067 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 38 predicate places. [2021-11-20 06:02:12,067 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 476 flow [2021-11-20 06:02:12,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:12,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:12,068 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:12,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:12,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:02:12,294 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -761860660, now seen corresponding path program 2 times [2021-11-20 06:02:12,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869237214] [2021-11-20 06:02:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:12,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:12,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869237214] [2021-11-20 06:02:12,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869237214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605072645] [2021-11-20 06:02:12,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:02:12,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:12,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:02:12,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:02:12,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:02:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:13,933 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-20 06:02:13,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-20 06:02:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:14,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:14,332 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-20 06:02:14,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-11-20 06:02:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:15,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605072645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:15,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:15,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 39 [2021-11-20 06:02:15,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259994140] [2021-11-20 06:02:15,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:15,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:02:15,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:02:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:02:15,181 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2021-11-20 06:02:15,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 476 flow. Second operand has 39 states, 39 states have (on average 93.94871794871794) internal successors, (3664), 39 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:15,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:15,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2021-11-20 06:02:15,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:16,841 INFO L129 PetriNetUnfolder]: 548/1928 cut-off events. [2021-11-20 06:02:16,841 INFO L130 PetriNetUnfolder]: For 1986/2075 co-relation queries the response was YES. [2021-11-20 06:02:16,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 1928 events. 548/1928 cut-off events. For 1986/2075 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 14476 event pairs, 39 based on Foata normal form. 59/1858 useless extension candidates. Maximal degree in co-relation 4426. Up to 245 conditions per place. [2021-11-20 06:02:16,863 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 116 selfloop transitions, 79 changer transitions 0/280 dead transitions. [2021-11-20 06:02:16,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 280 transitions, 1468 flow [2021-11-20 06:02:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:02:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-20 06:02:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3173 transitions. [2021-11-20 06:02:16,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6631138975966562 [2021-11-20 06:02:16,872 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3173 transitions. [2021-11-20 06:02:16,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3173 transitions. [2021-11-20 06:02:16,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:16,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3173 transitions. [2021-11-20 06:02:16,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 96.15151515151516) internal successors, (3173), 33 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:16,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:16,896 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:16,896 INFO L186 Difference]: Start difference. First operand has 168 places, 143 transitions, 476 flow. Second operand 33 states and 3173 transitions. [2021-11-20 06:02:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 280 transitions, 1468 flow [2021-11-20 06:02:16,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 1406 flow, removed 18 selfloop flow, removed 10 redundant places. [2021-11-20 06:02:16,908 INFO L242 Difference]: Finished difference. Result has 205 places, 207 transitions, 1153 flow [2021-11-20 06:02:16,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1153, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2021-11-20 06:02:16,909 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 75 predicate places. [2021-11-20 06:02:16,909 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 1153 flow [2021-11-20 06:02:16,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 93.94871794871794) internal successors, (3664), 39 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:16,911 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:16,911 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:16,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:02:17,134 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1360055062, now seen corresponding path program 3 times [2021-11-20 06:02:17,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071210423] [2021-11-20 06:02:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:17,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:17,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:17,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071210423] [2021-11-20 06:02:17,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071210423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:17,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414725671] [2021-11-20 06:02:17,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:02:17,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:17,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:17,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:02:17,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:02:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:02:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:18,385 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-20 06:02:18,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-20 06:02:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:02:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:18,562 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-20 06:02:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-11-20 06:02:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:02:18,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414725671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:18,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:18,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 23 [2021-11-20 06:02:18,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143456065] [2021-11-20 06:02:18,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:18,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:02:18,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:02:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:02:18,941 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2021-11-20 06:02:18,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 207 transitions, 1153 flow. Second operand has 23 states, 23 states have (on average 94.69565217391305) internal successors, (2178), 23 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:18,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:18,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2021-11-20 06:02:18,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:20,630 INFO L129 PetriNetUnfolder]: 803/2711 cut-off events. [2021-11-20 06:02:20,631 INFO L130 PetriNetUnfolder]: For 10803/11234 co-relation queries the response was YES. [2021-11-20 06:02:20,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8847 conditions, 2711 events. 803/2711 cut-off events. For 10803/11234 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 22290 event pairs, 153 based on Foata normal form. 236/2814 useless extension candidates. Maximal degree in co-relation 8809. Up to 644 conditions per place. [2021-11-20 06:02:20,673 INFO L132 encePairwiseOnDemand]: 122/145 looper letters, 155 selfloop transitions, 74 changer transitions 3/317 dead transitions. [2021-11-20 06:02:20,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 317 transitions, 2528 flow [2021-11-20 06:02:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:02:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-20 06:02:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3062 transitions. [2021-11-20 06:02:20,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6599137931034482 [2021-11-20 06:02:20,679 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3062 transitions. [2021-11-20 06:02:20,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3062 transitions. [2021-11-20 06:02:20,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:20,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3062 transitions. [2021-11-20 06:02:20,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.6875) internal successors, (3062), 32 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:20,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 145.0) internal successors, (4785), 33 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:20,699 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 145.0) internal successors, (4785), 33 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:20,699 INFO L186 Difference]: Start difference. First operand has 205 places, 207 transitions, 1153 flow. Second operand 32 states and 3062 transitions. [2021-11-20 06:02:20,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 317 transitions, 2528 flow [2021-11-20 06:02:20,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 317 transitions, 2440 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-11-20 06:02:20,732 INFO L242 Difference]: Finished difference. Result has 238 places, 239 transitions, 1681 flow [2021-11-20 06:02:20,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1681, PETRI_PLACES=238, PETRI_TRANSITIONS=239} [2021-11-20 06:02:20,733 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 108 predicate places. [2021-11-20 06:02:20,734 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 239 transitions, 1681 flow [2021-11-20 06:02:20,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 94.69565217391305) internal successors, (2178), 23 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:20,735 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:20,735 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:20,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:20,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:20,949 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1534631996, now seen corresponding path program 4 times [2021-11-20 06:02:20,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:20,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610727465] [2021-11-20 06:02:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:20,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:21,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610727465] [2021-11-20 06:02:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610727465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135322186] [2021-11-20 06:02:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:02:21,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:21,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:21,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:02:21,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:02:21,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 06:02:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:23,866 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-20 06:02:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 26 [2021-11-20 06:02:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:23,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:24,151 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-20 06:02:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-11-20 06:02:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135322186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:25,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:25,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 14] total 49 [2021-11-20 06:02:25,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648096639] [2021-11-20 06:02:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:25,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:02:25,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:02:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:02:25,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2021-11-20 06:02:25,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 239 transitions, 1681 flow. Second operand has 49 states, 49 states have (on average 76.22448979591837) internal successors, (3735), 49 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:25,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:25,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2021-11-20 06:02:25,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:30,170 INFO L129 PetriNetUnfolder]: 1770/5892 cut-off events. [2021-11-20 06:02:30,170 INFO L130 PetriNetUnfolder]: For 33626/34461 co-relation queries the response was YES. [2021-11-20 06:02:30,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20388 conditions, 5892 events. 1770/5892 cut-off events. For 33626/34461 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 58361 event pairs, 339 based on Foata normal form. 400/6015 useless extension candidates. Maximal degree in co-relation 20340. Up to 838 conditions per place. [2021-11-20 06:02:30,271 INFO L132 encePairwiseOnDemand]: 115/145 looper letters, 286 selfloop transitions, 179 changer transitions 1/537 dead transitions. [2021-11-20 06:02:30,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 537 transitions, 5241 flow [2021-11-20 06:02:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 06:02:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-20 06:02:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3857 transitions. [2021-11-20 06:02:30,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2021-11-20 06:02:30,280 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3857 transitions. [2021-11-20 06:02:30,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3857 transitions. [2021-11-20 06:02:30,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:30,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3857 transitions. [2021-11-20 06:02:30,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 78.71428571428571) internal successors, (3857), 49 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:30,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:30,397 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:30,397 INFO L186 Difference]: Start difference. First operand has 238 places, 239 transitions, 1681 flow. Second operand 49 states and 3857 transitions. [2021-11-20 06:02:30,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 537 transitions, 5241 flow [2021-11-20 06:02:30,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 537 transitions, 5019 flow, removed 77 selfloop flow, removed 23 redundant places. [2021-11-20 06:02:30,516 INFO L242 Difference]: Finished difference. Result has 280 places, 350 transitions, 3550 flow [2021-11-20 06:02:30,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3550, PETRI_PLACES=280, PETRI_TRANSITIONS=350} [2021-11-20 06:02:30,518 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 150 predicate places. [2021-11-20 06:02:30,518 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 350 transitions, 3550 flow [2021-11-20 06:02:30,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 76.22448979591837) internal successors, (3735), 49 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:30,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:30,520 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:30,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:30,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:30,741 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash 910768732, now seen corresponding path program 5 times [2021-11-20 06:02:30,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:30,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238536678] [2021-11-20 06:02:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:30,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:31,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:31,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238536678] [2021-11-20 06:02:31,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238536678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:31,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013515711] [2021-11-20 06:02:31,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:02:31,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:31,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:31,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:02:31,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 06:02:31,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:02:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:31,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:02:31,917 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:02:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:02:32,510 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 06:02:32,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 06:02:32,665 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-20 06:02:32,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-20 06:02:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:02:32,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:02:32,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013515711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:32,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:02:32,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [22] total 30 [2021-11-20 06:02:32,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539096967] [2021-11-20 06:02:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:32,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:02:32,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:02:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:02:32,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 145 [2021-11-20 06:02:32,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 350 transitions, 3550 flow. Second operand has 12 states, 12 states have (on average 98.08333333333333) internal successors, (1177), 12 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:32,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:32,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 145 [2021-11-20 06:02:32,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:34,371 INFO L129 PetriNetUnfolder]: 2110/6547 cut-off events. [2021-11-20 06:02:34,371 INFO L130 PetriNetUnfolder]: For 67751/68681 co-relation queries the response was YES. [2021-11-20 06:02:34,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26882 conditions, 6547 events. 2110/6547 cut-off events. For 67751/68681 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 64497 event pairs, 645 based on Foata normal form. 260/6385 useless extension candidates. Maximal degree in co-relation 26816. Up to 2212 conditions per place. [2021-11-20 06:02:34,470 INFO L132 encePairwiseOnDemand]: 129/145 looper letters, 214 selfloop transitions, 74 changer transitions 0/392 dead transitions. [2021-11-20 06:02:34,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 392 transitions, 4678 flow [2021-11-20 06:02:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:02:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 06:02:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1395 transitions. [2021-11-20 06:02:34,473 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.687192118226601 [2021-11-20 06:02:34,473 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1395 transitions. [2021-11-20 06:02:34,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1395 transitions. [2021-11-20 06:02:34,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:34,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1395 transitions. [2021-11-20 06:02:34,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.64285714285714) internal successors, (1395), 14 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:34,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 145.0) internal successors, (2175), 15 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:34,480 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 145.0) internal successors, (2175), 15 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:34,480 INFO L186 Difference]: Start difference. First operand has 280 places, 350 transitions, 3550 flow. Second operand 14 states and 1395 transitions. [2021-11-20 06:02:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 392 transitions, 4678 flow [2021-11-20 06:02:34,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 392 transitions, 4461 flow, removed 81 selfloop flow, removed 23 redundant places. [2021-11-20 06:02:34,764 INFO L242 Difference]: Finished difference. Result has 271 places, 358 transitions, 3682 flow [2021-11-20 06:02:34,765 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3682, PETRI_PLACES=271, PETRI_TRANSITIONS=358} [2021-11-20 06:02:34,765 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 141 predicate places. [2021-11-20 06:02:34,765 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 358 transitions, 3682 flow [2021-11-20 06:02:34,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.08333333333333) internal successors, (1177), 12 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:34,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:34,767 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:34,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 06:02:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:34,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -4708144, now seen corresponding path program 6 times [2021-11-20 06:02:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127446583] [2021-11-20 06:02:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:34,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:35,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127446583] [2021-11-20 06:02:35,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127446583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733003689] [2021-11-20 06:02:35,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:02:35,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:35,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:35,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:02:35,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 06:02:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:35,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:02:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:02:36,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:02:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:02:37,283 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 06:02:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 06:02:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 06:02:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:37,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:37,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:02:37,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 55 [2021-11-20 06:02:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:39,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733003689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:39,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:39,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 58 [2021-11-20 06:02:39,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164975489] [2021-11-20 06:02:39,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:39,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 06:02:39,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 06:02:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:02:39,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2021-11-20 06:02:39,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 358 transitions, 3682 flow. Second operand has 58 states, 58 states have (on average 84.29310344827586) internal successors, (4889), 58 states have internal predecessors, (4889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:39,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:39,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2021-11-20 06:02:39,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:02:45,118 INFO L129 PetriNetUnfolder]: 3224/10565 cut-off events. [2021-11-20 06:02:45,119 INFO L130 PetriNetUnfolder]: For 112480/114445 co-relation queries the response was YES. [2021-11-20 06:02:45,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42053 conditions, 10565 events. 3224/10565 cut-off events. For 112480/114445 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 115979 event pairs, 749 based on Foata normal form. 767/10749 useless extension candidates. Maximal degree in co-relation 41987. Up to 1604 conditions per place. [2021-11-20 06:02:45,291 INFO L132 encePairwiseOnDemand]: 120/145 looper letters, 308 selfloop transitions, 228 changer transitions 0/617 dead transitions. [2021-11-20 06:02:45,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 617 transitions, 7900 flow [2021-11-20 06:02:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 06:02:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-20 06:02:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3907 transitions. [2021-11-20 06:02:45,298 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5987739463601532 [2021-11-20 06:02:45,298 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3907 transitions. [2021-11-20 06:02:45,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3907 transitions. [2021-11-20 06:02:45,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:02:45,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3907 transitions. [2021-11-20 06:02:45,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 86.82222222222222) internal successors, (3907), 45 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:45,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:45,320 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:45,321 INFO L186 Difference]: Start difference. First operand has 271 places, 358 transitions, 3682 flow. Second operand 45 states and 3907 transitions. [2021-11-20 06:02:45,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 617 transitions, 7900 flow [2021-11-20 06:02:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 617 transitions, 7790 flow, removed 5 selfloop flow, removed 12 redundant places. [2021-11-20 06:02:45,710 INFO L242 Difference]: Finished difference. Result has 316 places, 445 transitions, 5745 flow [2021-11-20 06:02:45,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5745, PETRI_PLACES=316, PETRI_TRANSITIONS=445} [2021-11-20 06:02:45,711 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 186 predicate places. [2021-11-20 06:02:45,712 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 445 transitions, 5745 flow [2021-11-20 06:02:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.29310344827586) internal successors, (4889), 58 states have internal predecessors, (4889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:45,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:02:45,713 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:45,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:02:45,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:02:45,927 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:02:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash -324115418, now seen corresponding path program 1 times [2021-11-20 06:02:45,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:45,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956416136] [2021-11-20 06:02:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:45,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:48,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956416136] [2021-11-20 06:02:48,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956416136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660422695] [2021-11-20 06:02:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:48,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:48,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:02:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-20 06:02:48,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:02:48,652 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:02:48,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:02:50,019 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-20 06:02:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 06:02:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-11-20 06:02:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:51,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:53,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:02:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2021-11-20 06:02:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-20 06:02:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:57,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660422695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:57,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:57,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 37] total 105 [2021-11-20 06:02:57,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99640473] [2021-11-20 06:02:57,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:57,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-20 06:02:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-20 06:02:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=10108, Unknown=0, NotChecked=0, Total=10920 [2021-11-20 06:02:57,578 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2021-11-20 06:02:57,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 445 transitions, 5745 flow. Second operand has 105 states, 105 states have (on average 49.23809523809524) internal successors, (5170), 105 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:57,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:02:57,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2021-11-20 06:02:57,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:03:49,237 INFO L129 PetriNetUnfolder]: 17330/34868 cut-off events. [2021-11-20 06:03:49,237 INFO L130 PetriNetUnfolder]: For 448163/448180 co-relation queries the response was YES. [2021-11-20 06:03:49,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173643 conditions, 34868 events. 17330/34868 cut-off events. For 448163/448180 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 351410 event pairs, 4068 based on Foata normal form. 18/34788 useless extension candidates. Maximal degree in co-relation 173566. Up to 16403 conditions per place. [2021-11-20 06:03:49,938 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 789 selfloop transitions, 686 changer transitions 121/1636 dead transitions. [2021-11-20 06:03:49,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1636 transitions, 24081 flow [2021-11-20 06:03:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-20 06:03:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-11-20 06:03:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7573 transitions. [2021-11-20 06:03:49,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35772319319792156 [2021-11-20 06:03:49,951 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7573 transitions. [2021-11-20 06:03:49,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7573 transitions. [2021-11-20 06:03:49,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:03:49,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7573 transitions. [2021-11-20 06:03:49,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 51.86986301369863) internal successors, (7573), 146 states have internal predecessors, (7573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:49,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 145.0) internal successors, (21315), 147 states have internal predecessors, (21315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:49,990 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 145.0) internal successors, (21315), 147 states have internal predecessors, (21315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:49,990 INFO L186 Difference]: Start difference. First operand has 316 places, 445 transitions, 5745 flow. Second operand 146 states and 7573 transitions. [2021-11-20 06:03:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1636 transitions, 24081 flow [2021-11-20 06:03:53,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1636 transitions, 23499 flow, removed 232 selfloop flow, removed 29 redundant places. [2021-11-20 06:03:53,697 INFO L242 Difference]: Finished difference. Result has 474 places, 1038 transitions, 16144 flow [2021-11-20 06:03:53,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5434, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=16144, PETRI_PLACES=474, PETRI_TRANSITIONS=1038} [2021-11-20 06:03:53,698 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 344 predicate places. [2021-11-20 06:03:53,698 INFO L470 AbstractCegarLoop]: Abstraction has has 474 places, 1038 transitions, 16144 flow [2021-11-20 06:03:53,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 49.23809523809524) internal successors, (5170), 105 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:53,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:03:53,700 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:53,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:53,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:03:53,910 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:03:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1953685762, now seen corresponding path program 2 times [2021-11-20 06:03:53,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:53,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463591740] [2021-11-20 06:03:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:53,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:55,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463591740] [2021-11-20 06:03:55,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463591740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416712998] [2021-11-20 06:03:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:03:55,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:55,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:03:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:03:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:03:55,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:03:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:58,095 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 06:03:58,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-20 06:03:58,966 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-20 06:03:58,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-20 06:03:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:59,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:01,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:04:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2021-11-20 06:04:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:04,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416712998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:04,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:04,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 37] total 102 [2021-11-20 06:04:04,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796931134] [2021-11-20 06:04:04,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-20 06:04:04,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-20 06:04:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=9530, Unknown=0, NotChecked=0, Total=10302 [2021-11-20 06:04:04,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 145 [2021-11-20 06:04:04,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1038 transitions, 16144 flow. Second operand has 102 states, 102 states have (on average 53.21568627450981) internal successors, (5428), 102 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:04,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:04,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 145 [2021-11-20 06:04:04,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:44,975 INFO L129 PetriNetUnfolder]: 21495/43226 cut-off events. [2021-11-20 06:04:44,975 INFO L130 PetriNetUnfolder]: For 829654/829696 co-relation queries the response was YES. [2021-11-20 06:04:45,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274046 conditions, 43226 events. 21495/43226 cut-off events. For 829654/829696 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 445019 event pairs, 4413 based on Foata normal form. 50/43157 useless extension candidates. Maximal degree in co-relation 273933. Up to 26470 conditions per place. [2021-11-20 06:04:46,152 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 784 selfloop transitions, 1625 changer transitions 53/2505 dead transitions. [2021-11-20 06:04:46,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2505 transitions, 46944 flow [2021-11-20 06:04:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-20 06:04:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-11-20 06:04:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5542 transitions. [2021-11-20 06:04:46,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38220689655172413 [2021-11-20 06:04:46,161 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5542 transitions. [2021-11-20 06:04:46,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5542 transitions. [2021-11-20 06:04:46,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:46,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5542 transitions. [2021-11-20 06:04:46,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.42) internal successors, (5542), 100 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:46,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 145.0) internal successors, (14645), 101 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:46,188 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 145.0) internal successors, (14645), 101 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:46,188 INFO L186 Difference]: Start difference. First operand has 474 places, 1038 transitions, 16144 flow. Second operand 100 states and 5542 transitions. [2021-11-20 06:04:46,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2505 transitions, 46944 flow [2021-11-20 06:04:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 2505 transitions, 46199 flow, removed 341 selfloop flow, removed 38 redundant places. [2021-11-20 06:04:58,216 INFO L242 Difference]: Finished difference. Result has 547 places, 2281 transitions, 45989 flow [2021-11-20 06:04:58,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=15614, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=45989, PETRI_PLACES=547, PETRI_TRANSITIONS=2281} [2021-11-20 06:04:58,217 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 417 predicate places. [2021-11-20 06:04:58,217 INFO L470 AbstractCegarLoop]: Abstraction has has 547 places, 2281 transitions, 45989 flow [2021-11-20 06:04:58,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 53.21568627450981) internal successors, (5428), 102 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:58,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:58,219 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:58,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:58,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:04:58,423 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1668716970, now seen corresponding path program 3 times [2021-11-20 06:04:58,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:58,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962381899] [2021-11-20 06:04:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:58,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:00,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:00,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962381899] [2021-11-20 06:05:00,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962381899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:00,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857054134] [2021-11-20 06:05:00,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:05:00,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:00,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:00,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f030c6f-1135-4c61-aa1a-47c21f0b173b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:05:00,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:05:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:05:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:05:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:01,830 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-20 06:05:01,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-20 06:05:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:05:02,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:05:03,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:05:03,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-11-20 06:05:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:05:05,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857054134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:05:05,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:05:05,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2021-11-20 06:05:05,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496714811] [2021-11-20 06:05:05,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:05:05,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 06:05:05,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 06:05:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=4635, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 06:05:05,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-11-20 06:05:05,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 2281 transitions, 45989 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:05,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:05:05,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-11-20 06:05:05,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand