./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/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_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:09:13,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:09:13,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:09:13,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:09:13,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:09:13,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:09:13,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:09:13,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:09:13,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:09:13,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:09:13,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:09:13,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:09:13,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:09:13,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:09:13,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:09:13,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:09:13,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:09:13,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:09:13,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:09:13,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:09:13,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:09:13,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:09:13,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:09:13,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:09:13,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:09:13,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:09:13,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:09:13,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:09:13,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:09:13,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:09:13,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:09:13,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:09:13,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:09:13,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:09:13,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:09:13,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:09:13,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:09:13,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:09:13,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:09:13,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:09:13,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:09:13,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:09:13,952 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:09:13,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:09:13,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:09:13,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:09:13,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:09:13,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:09:13,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:09:13,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:09:13,956 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:09:13,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:09:13,957 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:09:13,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:09:13,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:09:13,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:09:13,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:09:13,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:09:13,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:09:13,959 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:09:13,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:09:13,959 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:09:13,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:09:13,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:09:13,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:09:13,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:09:13,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:09:13,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:09:13,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:09:13,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:09:13,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:09:13,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:09:13,963 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:09:13,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:09:13,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:09:13,963 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_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-11-20 12:09:14,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:09:14,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:09:14,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:09:14,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:09:14,355 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:09:14,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-20 12:09:18,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:09:18,364 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:09:18,365 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-20 12:09:18,373 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/data/0ee6fe143/5b90e0e9c5644f408ac7b6e44cd9ef54/FLAG599229f74 [2022-11-20 12:09:18,390 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/data/0ee6fe143/5b90e0e9c5644f408ac7b6e44cd9ef54 [2022-11-20 12:09:18,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:09:18,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:09:18,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:09:18,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:09:18,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:09:18,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:18,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dca31c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18, skipping insertion in model container [2022-11-20 12:09:18,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:18,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:09:18,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:09:18,772 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-20 12:09:18,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:09:18,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:09:18,873 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-20 12:09:18,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:09:18,895 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:09:18,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18 WrapperNode [2022-11-20 12:09:18,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:09:18,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:09:18,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:09:18,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:09:18,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:18,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:18,985 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-11-20 12:09:18,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:09:18,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:09:18,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:09:18,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:09:18,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:09:19,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:09:19,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:09:19,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:09:19,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (1/1) ... [2022-11-20 12:09:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:09:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:19,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:09:19,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:09:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:09:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:09:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:09:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:09:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:09:19,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:09:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:09:19,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:09:19,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:09:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:09:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:09:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:09:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:09:19,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:09:19,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:09:19,184 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:09:19,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:09:19,377 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:09:19,783 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:09:20,033 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:09:20,034 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:09:20,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:09:20 BoogieIcfgContainer [2022-11-20 12:09:20,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:09:20,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:09:20,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:09:20,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:09:20,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:09:18" (1/3) ... [2022-11-20 12:09:20,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba0e059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:09:20, skipping insertion in model container [2022-11-20 12:09:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:09:18" (2/3) ... [2022-11-20 12:09:20,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba0e059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:09:20, skipping insertion in model container [2022-11-20 12:09:20,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:09:20" (3/3) ... [2022-11-20 12:09:20,057 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-11-20 12:09:20,068 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:09:20,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:09:20,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:09:20,083 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:09:20,155 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:09:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2022-11-20 12:09:20,341 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2022-11-20 12:09:20,341 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:09:20,348 INFO L83 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 76 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. [2022-11-20 12:09:20,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2022-11-20 12:09:20,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2022-11-20 12:09:20,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:09:20,391 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52490ced, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:09:20,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:09:20,494 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2022-11-20 12:09:20,495 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:09:20,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:20,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:20,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -142640952, now seen corresponding path program 1 times [2022-11-20 12:09:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287416919] [2022-11-20 12:09:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287416919] [2022-11-20 12:09:21,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287416919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:21,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:21,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:09:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708522768] [2022-11-20 12:09:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:21,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:09:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:09:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:09:21,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2022-11-20 12:09:21,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:21,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:21,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2022-11-20 12:09:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:21,213 INFO L130 PetriNetUnfolder]: 12/160 cut-off events. [2022-11-20 12:09:21,213 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 12:09:21,215 INFO L83 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 193 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. [2022-11-20 12:09:21,217 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2022-11-20 12:09:21,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2022-11-20 12:09:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:09:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:09:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-11-20 12:09:21,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2022-11-20 12:09:21,249 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-11-20 12:09:21,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-11-20 12:09:21,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:21,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-11-20 12:09:21,266 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) [2022-11-20 12:09:21,275 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) [2022-11-20 12:09:21,276 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) [2022-11-20 12:09:21,278 INFO L175 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2022-11-20 12:09:21,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2022-11-20 12:09:21,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:09:21,296 INFO L231 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2022-11-20 12:09:21,299 INFO L271 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} [2022-11-20 12:09:21,306 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2022-11-20 12:09:21,306 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2022-11-20 12:09:21,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:21,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:21,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:21,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:09:21,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1538584147, now seen corresponding path program 1 times [2022-11-20 12:09:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:21,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638083394] [2022-11-20 12:09:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:21,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:21,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638083394] [2022-11-20 12:09:21,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638083394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:21,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:21,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:09:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671159125] [2022-11-20 12:09:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:09:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:09:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:09:21,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2022-11-20 12:09:21,938 INFO L100 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) [2022-11-20 12:09:21,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:21,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2022-11-20 12:09:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:22,174 INFO L130 PetriNetUnfolder]: 12/193 cut-off events. [2022-11-20 12:09:22,174 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 12:09:22,175 INFO L83 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 276 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. [2022-11-20 12:09:22,177 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2022-11-20 12:09:22,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2022-11-20 12:09:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:09:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:09:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2022-11-20 12:09:22,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2022-11-20 12:09:22,181 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2022-11-20 12:09:22,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2022-11-20 12:09:22,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:22,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2022-11-20 12:09:22,186 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) [2022-11-20 12:09:22,190 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) [2022-11-20 12:09:22,191 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) [2022-11-20 12:09:22,191 INFO L175 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2022-11-20 12:09:22,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2022-11-20 12:09:22,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:09:22,196 INFO L231 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2022-11-20 12:09:22,197 INFO L271 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} [2022-11-20 12:09:22,198 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2022-11-20 12:09:22,198 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2022-11-20 12:09:22,199 INFO L496 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) [2022-11-20 12:09:22,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:22,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:22,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:09:22,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2022-11-20 12:09:22,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:22,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477605391] [2022-11-20 12:09:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:22,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:22,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477605391] [2022-11-20 12:09:22,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477605391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:22,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:22,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:09:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692916262] [2022-11-20 12:09:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:09:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:09:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:09:22,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 145 [2022-11-20 12:09:22,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:22,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:22,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 145 [2022-11-20 12:09:22,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:22,806 INFO L130 PetriNetUnfolder]: 12/163 cut-off events. [2022-11-20 12:09:22,806 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 12:09:22,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 163 events. 12/163 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 183 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 216. Up to 22 conditions per place. [2022-11-20 12:09:22,812 INFO L137 encePairwiseOnDemand]: 139/145 looper letters, 12 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2022-11-20 12:09:22,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 319 flow [2022-11-20 12:09:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:09:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:09:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2022-11-20 12:09:22,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8827586206896552 [2022-11-20 12:09:22,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2022-11-20 12:09:22,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2022-11-20 12:09:22,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:22,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2022-11-20 12:09:22,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:22,841 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) [2022-11-20 12:09:22,842 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) [2022-11-20 12:09:22,842 INFO L175 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 384 transitions. [2022-11-20 12:09:22,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 319 flow [2022-11-20 12:09:22,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:09:22,850 INFO L231 Difference]: Finished difference. Result has 129 places, 125 transitions, 293 flow [2022-11-20 12:09:22,850 INFO L271 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2022-11-20 12:09:22,853 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2022-11-20 12:09:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 293 flow [2022-11-20 12:09:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:22,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:22,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:22,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:09:22,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash -406195716, now seen corresponding path program 2 times [2022-11-20 12:09:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:22,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185269420] [2022-11-20 12:09:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:24,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185269420] [2022-11-20 12:09:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185269420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:24,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:24,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63075525] [2022-11-20 12:09:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:24,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:24,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 293 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) [2022-11-20 12:09:24,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:24,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:24,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:25,135 INFO L130 PetriNetUnfolder]: 116/395 cut-off events. [2022-11-20 12:09:25,136 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-20 12:09:25,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 395 events. 116/395 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1445 event pairs, 19 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 768. Up to 177 conditions per place. [2022-11-20 12:09:25,141 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 60 selfloop transitions, 20 changer transitions 7/167 dead transitions. [2022-11-20 12:09:25,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 167 transitions, 581 flow [2022-11-20 12:09:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2022-11-20 12:09:25,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-11-20 12:09:25,148 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2022-11-20 12:09:25,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2022-11-20 12:09:25,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:25,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2022-11-20 12:09:25,162 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) [2022-11-20 12:09:25,170 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) [2022-11-20 12:09:25,172 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) [2022-11-20 12:09:25,172 INFO L175 Difference]: Start difference. First operand has 129 places, 125 transitions, 293 flow. Second operand 16 states and 1512 transitions. [2022-11-20 12:09:25,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 167 transitions, 581 flow [2022-11-20 12:09:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 167 transitions, 553 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-20 12:09:25,188 INFO L231 Difference]: Finished difference. Result has 149 places, 140 transitions, 388 flow [2022-11-20 12:09:25,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=278, 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=16, PETRI_FLOW=388, PETRI_PLACES=149, PETRI_TRANSITIONS=140} [2022-11-20 12:09:25,191 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 19 predicate places. [2022-11-20 12:09:25,198 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 140 transitions, 388 flow [2022-11-20 12:09:25,201 INFO L496 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) [2022-11-20 12:09:25,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:25,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:09:25,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1605935816, now seen corresponding path program 3 times [2022-11-20 12:09:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250107512] [2022-11-20 12:09:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:25,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:26,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250107512] [2022-11-20 12:09:26,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250107512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:26,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:26,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461287953] [2022-11-20 12:09:26,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:26,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:26,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 140 transitions, 388 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) [2022-11-20 12:09:26,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:26,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:26,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:27,502 INFO L130 PetriNetUnfolder]: 127/453 cut-off events. [2022-11-20 12:09:27,502 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-11-20 12:09:27,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 453 events. 127/453 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1955 event pairs, 18 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 996. Up to 172 conditions per place. [2022-11-20 12:09:27,509 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 24 changer transitions 6/180 dead transitions. [2022-11-20 12:09:27,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 180 transitions, 736 flow [2022-11-20 12:09:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:09:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:09:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2022-11-20 12:09:27,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2022-11-20 12:09:27,516 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2022-11-20 12:09:27,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2022-11-20 12:09:27,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:27,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2022-11-20 12:09:27,523 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) [2022-11-20 12:09:27,530 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) [2022-11-20 12:09:27,532 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) [2022-11-20 12:09:27,532 INFO L175 Difference]: Start difference. First operand has 149 places, 140 transitions, 388 flow. Second operand 18 states and 1701 transitions. [2022-11-20 12:09:27,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 180 transitions, 736 flow [2022-11-20 12:09:27,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 180 transitions, 716 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-20 12:09:27,545 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 466 flow [2022-11-20 12:09:27,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=466, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2022-11-20 12:09:27,549 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 31 predicate places. [2022-11-20 12:09:27,550 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 466 flow [2022-11-20 12:09:27,552 INFO L496 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) [2022-11-20 12:09:27,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:27,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:27,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:09:27,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash -746491024, now seen corresponding path program 4 times [2022-11-20 12:09:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:27,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390125705] [2022-11-20 12:09:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:28,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390125705] [2022-11-20 12:09:28,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390125705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:28,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:28,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102875292] [2022-11-20 12:09:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:28,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:28,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:28,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 466 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) [2022-11-20 12:09:28,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:28,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:28,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:29,564 INFO L130 PetriNetUnfolder]: 138/501 cut-off events. [2022-11-20 12:09:29,564 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2022-11-20 12:09:29,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 501 events. 138/501 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2317 event pairs, 42 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 1255. Up to 216 conditions per place. [2022-11-20 12:09:29,570 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 68 selfloop transitions, 30 changer transitions 6/184 dead transitions. [2022-11-20 12:09:29,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 184 transitions, 873 flow [2022-11-20 12:09:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2022-11-20 12:09:29,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2022-11-20 12:09:29,577 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2022-11-20 12:09:29,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2022-11-20 12:09:29,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:29,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2022-11-20 12:09:29,583 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) [2022-11-20 12:09:29,589 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) [2022-11-20 12:09:29,591 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) [2022-11-20 12:09:29,591 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 466 flow. Second operand 16 states and 1517 transitions. [2022-11-20 12:09:29,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 184 transitions, 873 flow [2022-11-20 12:09:29,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 812 flow, removed 12 selfloop flow, removed 12 redundant places. [2022-11-20 12:09:29,603 INFO L231 Difference]: Finished difference. Result has 169 places, 157 transitions, 606 flow [2022-11-20 12:09:29,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=606, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2022-11-20 12:09:29,606 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 39 predicate places. [2022-11-20 12:09:29,607 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 606 flow [2022-11-20 12:09:29,608 INFO L496 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) [2022-11-20 12:09:29,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:29,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:09:29,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1331714556, now seen corresponding path program 5 times [2022-11-20 12:09:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728307587] [2022-11-20 12:09:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:29,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728307587] [2022-11-20 12:09:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728307587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:30,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:30,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609735670] [2022-11-20 12:09:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:30,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:30,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:30,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 606 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) [2022-11-20 12:09:30,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:30,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:30,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:31,547 INFO L130 PetriNetUnfolder]: 142/518 cut-off events. [2022-11-20 12:09:31,547 INFO L131 PetriNetUnfolder]: For 844/844 co-relation queries the response was YES. [2022-11-20 12:09:31,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 518 events. 142/518 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2506 event pairs, 46 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1490. Up to 228 conditions per place. [2022-11-20 12:09:31,554 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 72 selfloop transitions, 36 changer transitions 6/194 dead transitions. [2022-11-20 12:09:31,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 194 transitions, 1082 flow [2022-11-20 12:09:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2022-11-20 12:09:31,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2022-11-20 12:09:31,561 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2022-11-20 12:09:31,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2022-11-20 12:09:31,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:31,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2022-11-20 12:09:31,570 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) [2022-11-20 12:09:31,576 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) [2022-11-20 12:09:31,578 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) [2022-11-20 12:09:31,578 INFO L175 Difference]: Start difference. First operand has 169 places, 157 transitions, 606 flow. Second operand 16 states and 1519 transitions. [2022-11-20 12:09:31,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 194 transitions, 1082 flow [2022-11-20 12:09:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 194 transitions, 1015 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-11-20 12:09:31,590 INFO L231 Difference]: Finished difference. Result has 180 places, 170 transitions, 806 flow [2022-11-20 12:09:31,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=806, PETRI_PLACES=180, PETRI_TRANSITIONS=170} [2022-11-20 12:09:31,592 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 50 predicate places. [2022-11-20 12:09:31,592 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 170 transitions, 806 flow [2022-11-20 12:09:31,593 INFO L496 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) [2022-11-20 12:09:31,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:31,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:09:31,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash -370733864, now seen corresponding path program 6 times [2022-11-20 12:09:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435888260] [2022-11-20 12:09:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435888260] [2022-11-20 12:09:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435888260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:32,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:32,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119734475] [2022-11-20 12:09:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:32,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:32,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 170 transitions, 806 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) [2022-11-20 12:09:32,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:32,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:32,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:33,343 INFO L130 PetriNetUnfolder]: 144/529 cut-off events. [2022-11-20 12:09:33,344 INFO L131 PetriNetUnfolder]: For 1342/1342 co-relation queries the response was YES. [2022-11-20 12:09:33,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 529 events. 144/529 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2598 event pairs, 69 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 1636. Up to 240 conditions per place. [2022-11-20 12:09:33,351 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 77 selfloop transitions, 31 changer transitions 6/194 dead transitions. [2022-11-20 12:09:33,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 194 transitions, 1180 flow [2022-11-20 12:09:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-11-20 12:09:33,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-11-20 12:09:33,362 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-11-20 12:09:33,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-11-20 12:09:33,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:33,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-11-20 12:09:33,367 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) [2022-11-20 12:09:33,373 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) [2022-11-20 12:09:33,375 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) [2022-11-20 12:09:33,375 INFO L175 Difference]: Start difference. First operand has 180 places, 170 transitions, 806 flow. Second operand 16 states and 1514 transitions. [2022-11-20 12:09:33,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 194 transitions, 1180 flow [2022-11-20 12:09:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 194 transitions, 1095 flow, removed 38 selfloop flow, removed 7 redundant places. [2022-11-20 12:09:33,396 INFO L231 Difference]: Finished difference. Result has 189 places, 171 transitions, 815 flow [2022-11-20 12:09:33,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=815, PETRI_PLACES=189, PETRI_TRANSITIONS=171} [2022-11-20 12:09:33,401 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 59 predicate places. [2022-11-20 12:09:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 171 transitions, 815 flow [2022-11-20 12:09:33,403 INFO L496 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) [2022-11-20 12:09:33,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:33,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:09:33,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1980525462, now seen corresponding path program 7 times [2022-11-20 12:09:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403421925] [2022-11-20 12:09:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:33,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:34,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403421925] [2022-11-20 12:09:34,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403421925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:34,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:34,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895764078] [2022-11-20 12:09:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:34,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:34,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:34,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 171 transitions, 815 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) [2022-11-20 12:09:34,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:34,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:34,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:35,356 INFO L130 PetriNetUnfolder]: 148/549 cut-off events. [2022-11-20 12:09:35,357 INFO L131 PetriNetUnfolder]: For 1535/1535 co-relation queries the response was YES. [2022-11-20 12:09:35,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 549 events. 148/549 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2798 event pairs, 44 based on Foata normal form. 1/541 useless extension candidates. Maximal degree in co-relation 1698. Up to 232 conditions per place. [2022-11-20 12:09:35,364 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 77 selfloop transitions, 36 changer transitions 6/199 dead transitions. [2022-11-20 12:09:35,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 199 transitions, 1239 flow [2022-11-20 12:09:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:09:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 12:09:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2022-11-20 12:09:35,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2022-11-20 12:09:35,373 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2022-11-20 12:09:35,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2022-11-20 12:09:35,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:35,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2022-11-20 12:09:35,381 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) [2022-11-20 12:09:35,388 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) [2022-11-20 12:09:35,389 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) [2022-11-20 12:09:35,390 INFO L175 Difference]: Start difference. First operand has 189 places, 171 transitions, 815 flow. Second operand 17 states and 1607 transitions. [2022-11-20 12:09:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 199 transitions, 1239 flow [2022-11-20 12:09:35,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 199 transitions, 1155 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-11-20 12:09:35,405 INFO L231 Difference]: Finished difference. Result has 194 places, 174 transitions, 868 flow [2022-11-20 12:09:35,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=868, PETRI_PLACES=194, PETRI_TRANSITIONS=174} [2022-11-20 12:09:35,406 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 64 predicate places. [2022-11-20 12:09:35,407 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 174 transitions, 868 flow [2022-11-20 12:09:35,408 INFO L496 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) [2022-11-20 12:09:35,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:35,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:35,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:09:35,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash -987092368, now seen corresponding path program 8 times [2022-11-20 12:09:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:35,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464567681] [2022-11-20 12:09:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:36,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464567681] [2022-11-20 12:09:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464567681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360941396] [2022-11-20 12:09:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:36,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:36,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 174 transitions, 868 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) [2022-11-20 12:09:36,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:36,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:36,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:37,098 INFO L130 PetriNetUnfolder]: 149/553 cut-off events. [2022-11-20 12:09:37,098 INFO L131 PetriNetUnfolder]: For 1824/1824 co-relation queries the response was YES. [2022-11-20 12:09:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 553 events. 149/553 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2891 event pairs, 42 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1775. Up to 260 conditions per place. [2022-11-20 12:09:37,105 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 32 changer transitions 7/199 dead transitions. [2022-11-20 12:09:37,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 199 transitions, 1298 flow [2022-11-20 12:09:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2022-11-20 12:09:37,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2022-11-20 12:09:37,114 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2022-11-20 12:09:37,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2022-11-20 12:09:37,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:37,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2022-11-20 12:09:37,119 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) [2022-11-20 12:09:37,134 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) [2022-11-20 12:09:37,146 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) [2022-11-20 12:09:37,146 INFO L175 Difference]: Start difference. First operand has 194 places, 174 transitions, 868 flow. Second operand 16 states and 1514 transitions. [2022-11-20 12:09:37,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 199 transitions, 1298 flow [2022-11-20 12:09:37,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 199 transitions, 1186 flow, removed 24 selfloop flow, removed 13 redundant places. [2022-11-20 12:09:37,163 INFO L231 Difference]: Finished difference. Result has 197 places, 176 transitions, 880 flow [2022-11-20 12:09:37,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=880, PETRI_PLACES=197, PETRI_TRANSITIONS=176} [2022-11-20 12:09:37,165 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 67 predicate places. [2022-11-20 12:09:37,165 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 176 transitions, 880 flow [2022-11-20 12:09:37,166 INFO L496 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) [2022-11-20 12:09:37,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:37,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:09:37,167 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 808962262, now seen corresponding path program 9 times [2022-11-20 12:09:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:37,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871685686] [2022-11-20 12:09:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:38,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871685686] [2022-11-20 12:09:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871685686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:38,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:38,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670622441] [2022-11-20 12:09:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:38,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:38,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 176 transitions, 880 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) [2022-11-20 12:09:38,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:38,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:38,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:38,735 INFO L130 PetriNetUnfolder]: 152/556 cut-off events. [2022-11-20 12:09:38,735 INFO L131 PetriNetUnfolder]: For 1800/1800 co-relation queries the response was YES. [2022-11-20 12:09:38,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 556 events. 152/556 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2855 event pairs, 74 based on Foata normal form. 1/545 useless extension candidates. Maximal degree in co-relation 1786. Up to 260 conditions per place. [2022-11-20 12:09:38,741 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 33 changer transitions 6/201 dead transitions. [2022-11-20 12:09:38,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 201 transitions, 1301 flow [2022-11-20 12:09:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-11-20 12:09:38,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-11-20 12:09:38,746 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-11-20 12:09:38,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-11-20 12:09:38,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:38,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-11-20 12:09:38,751 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) [2022-11-20 12:09:38,755 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) [2022-11-20 12:09:38,757 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) [2022-11-20 12:09:38,757 INFO L175 Difference]: Start difference. First operand has 197 places, 176 transitions, 880 flow. Second operand 16 states and 1516 transitions. [2022-11-20 12:09:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 201 transitions, 1301 flow [2022-11-20 12:09:38,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 1223 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-11-20 12:09:38,773 INFO L231 Difference]: Finished difference. Result has 200 places, 177 transitions, 904 flow [2022-11-20 12:09:38,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=904, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2022-11-20 12:09:38,775 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2022-11-20 12:09:38,775 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 904 flow [2022-11-20 12:09:38,776 INFO L496 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) [2022-11-20 12:09:38,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:38,776 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:09:38,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1079660830, now seen corresponding path program 10 times [2022-11-20 12:09:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025812719] [2022-11-20 12:09:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025812719] [2022-11-20 12:09:39,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025812719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:39,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:39,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201816090] [2022-11-20 12:09:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:39,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:39,811 INFO L100 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) [2022-11-20 12:09:39,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:39,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:40,581 INFO L130 PetriNetUnfolder]: 154/573 cut-off events. [2022-11-20 12:09:40,581 INFO L131 PetriNetUnfolder]: For 2214/2214 co-relation queries the response was YES. [2022-11-20 12:09:40,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 573 events. 154/573 cut-off events. For 2214/2214 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3036 event pairs, 48 based on Foata normal form. 1/565 useless extension candidates. Maximal degree in co-relation 1862. Up to 246 conditions per place. [2022-11-20 12:09:40,587 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 79 selfloop transitions, 39 changer transitions 6/204 dead transitions. [2022-11-20 12:09:40,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 1360 flow [2022-11-20 12:09:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:09:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 12:09:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2022-11-20 12:09:40,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2022-11-20 12:09:40,593 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2022-11-20 12:09:40,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2022-11-20 12:09:40,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:40,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2022-11-20 12:09:40,598 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) [2022-11-20 12:09:40,602 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) [2022-11-20 12:09:40,604 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) [2022-11-20 12:09:40,604 INFO L175 Difference]: Start difference. First operand has 200 places, 177 transitions, 904 flow. Second operand 17 states and 1609 transitions. [2022-11-20 12:09:40,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 1360 flow [2022-11-20 12:09:40,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 204 transitions, 1268 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-11-20 12:09:40,626 INFO L231 Difference]: Finished difference. Result has 204 places, 179 transitions, 945 flow [2022-11-20 12:09:40,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=945, PETRI_PLACES=204, PETRI_TRANSITIONS=179} [2022-11-20 12:09:40,628 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 74 predicate places. [2022-11-20 12:09:40,628 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 179 transitions, 945 flow [2022-11-20 12:09:40,629 INFO L496 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) [2022-11-20 12:09:40,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:40,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:40,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:09:40,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 11 times [2022-11-20 12:09:40,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:40,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934798104] [2022-11-20 12:09:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:41,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934798104] [2022-11-20 12:09:41,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934798104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:41,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:41,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:41,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563771246] [2022-11-20 12:09:41,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:41,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:41,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:41,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 179 transitions, 945 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) [2022-11-20 12:09:41,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:41,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:41,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:42,126 INFO L130 PetriNetUnfolder]: 155/574 cut-off events. [2022-11-20 12:09:42,126 INFO L131 PetriNetUnfolder]: For 2518/2518 co-relation queries the response was YES. [2022-11-20 12:09:42,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 574 events. 155/574 cut-off events. For 2518/2518 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3022 event pairs, 76 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1923. Up to 274 conditions per place. [2022-11-20 12:09:42,133 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 35 changer transitions 7/204 dead transitions. [2022-11-20 12:09:42,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 204 transitions, 1416 flow [2022-11-20 12:09:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2022-11-20 12:09:42,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2022-11-20 12:09:42,141 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2022-11-20 12:09:42,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2022-11-20 12:09:42,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:42,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2022-11-20 12:09:42,152 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) [2022-11-20 12:09:42,156 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) [2022-11-20 12:09:42,157 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) [2022-11-20 12:09:42,157 INFO L175 Difference]: Start difference. First operand has 204 places, 179 transitions, 945 flow. Second operand 16 states and 1516 transitions. [2022-11-20 12:09:42,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 204 transitions, 1416 flow [2022-11-20 12:09:42,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1285 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-11-20 12:09:42,185 INFO L231 Difference]: Finished difference. Result has 206 places, 181 transitions, 949 flow [2022-11-20 12:09:42,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=949, PETRI_PLACES=206, PETRI_TRANSITIONS=181} [2022-11-20 12:09:42,187 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2022-11-20 12:09:42,188 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 181 transitions, 949 flow [2022-11-20 12:09:42,188 INFO L496 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) [2022-11-20 12:09:42,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:42,189 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:09:42,189 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 320621726, now seen corresponding path program 12 times [2022-11-20 12:09:42,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450455061] [2022-11-20 12:09:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:42,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:43,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:43,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450455061] [2022-11-20 12:09:43,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450455061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:09:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641372277] [2022-11-20 12:09:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:09:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:09:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:09:43,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2022-11-20 12:09:43,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 181 transitions, 949 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) [2022-11-20 12:09:43,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:43,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2022-11-20 12:09:43,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:43,927 INFO L130 PetriNetUnfolder]: 158/580 cut-off events. [2022-11-20 12:09:43,927 INFO L131 PetriNetUnfolder]: For 2495/2495 co-relation queries the response was YES. [2022-11-20 12:09:43,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 580 events. 158/580 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3057 event pairs, 79 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 1931. Up to 274 conditions per place. [2022-11-20 12:09:43,934 INFO L137 encePairwiseOnDemand]: 128/145 looper letters, 84 selfloop transitions, 36 changer transitions 6/206 dead transitions. [2022-11-20 12:09:43,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 206 transitions, 1409 flow [2022-11-20 12:09:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:09:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 12:09:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2022-11-20 12:09:43,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2022-11-20 12:09:43,939 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2022-11-20 12:09:43,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2022-11-20 12:09:43,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:43,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2022-11-20 12:09:43,945 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) [2022-11-20 12:09:43,952 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) [2022-11-20 12:09:43,953 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) [2022-11-20 12:09:43,953 INFO L175 Difference]: Start difference. First operand has 206 places, 181 transitions, 949 flow. Second operand 16 states and 1518 transitions. [2022-11-20 12:09:43,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 206 transitions, 1409 flow [2022-11-20 12:09:43,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 206 transitions, 1322 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-11-20 12:09:43,973 INFO L231 Difference]: Finished difference. Result has 209 places, 182 transitions, 974 flow [2022-11-20 12:09:43,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=974, PETRI_PLACES=209, PETRI_TRANSITIONS=182} [2022-11-20 12:09:43,975 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 79 predicate places. [2022-11-20 12:09:43,975 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 182 transitions, 974 flow [2022-11-20 12:09:43,976 INFO L496 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) [2022-11-20 12:09:43,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:43,976 INFO L209 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] [2022-11-20 12:09:43,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:09:43,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash 393741344, now seen corresponding path program 1 times [2022-11-20 12:09:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:43,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908711117] [2022-11-20 12:09:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:09:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:44,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908711117] [2022-11-20 12:09:44,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908711117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:44,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:44,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:09:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575832234] [2022-11-20 12:09:44,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:44,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:09:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:44,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:09:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:09:44,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2022-11-20 12:09:44,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 182 transitions, 974 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:44,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:44,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2022-11-20 12:09:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:44,285 INFO L130 PetriNetUnfolder]: 42/466 cut-off events. [2022-11-20 12:09:44,286 INFO L131 PetriNetUnfolder]: For 3060/3129 co-relation queries the response was YES. [2022-11-20 12:09:44,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 466 events. 42/466 cut-off events. For 3060/3129 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2373 event pairs, 7 based on Foata normal form. 44/503 useless extension candidates. Maximal degree in co-relation 1288. Up to 47 conditions per place. [2022-11-20 12:09:44,290 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 16 selfloop transitions, 7 changer transitions 34/179 dead transitions. [2022-11-20 12:09:44,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 179 transitions, 983 flow [2022-11-20 12:09:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:09:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:09:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2022-11-20 12:09:44,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9017241379310345 [2022-11-20 12:09:44,293 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2022-11-20 12:09:44,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2022-11-20 12:09:44,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:44,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2022-11-20 12:09:44,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:44,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:44,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:44,297 INFO L175 Difference]: Start difference. First operand has 209 places, 182 transitions, 974 flow. Second operand 4 states and 523 transitions. [2022-11-20 12:09:44,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 179 transitions, 983 flow [2022-11-20 12:09:44,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 179 transitions, 900 flow, removed 3 selfloop flow, removed 17 redundant places. [2022-11-20 12:09:44,312 INFO L231 Difference]: Finished difference. Result has 194 places, 139 transitions, 538 flow [2022-11-20 12:09:44,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=538, PETRI_PLACES=194, PETRI_TRANSITIONS=139} [2022-11-20 12:09:44,316 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 64 predicate places. [2022-11-20 12:09:44,317 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 139 transitions, 538 flow [2022-11-20 12:09:44,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:44,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:44,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:44,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:09:44,318 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:44,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1528392749, now seen corresponding path program 1 times [2022-11-20 12:09:44,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:44,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067296494] [2022-11-20 12:09:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:44,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:44,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067296494] [2022-11-20 12:09:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067296494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963063869] [2022-11-20 12:09:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:44,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:44,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:09:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:09:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:45,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:45,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963063869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:09:45,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:09:45,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 12:09:45,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623826423] [2022-11-20 12:09:45,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:45,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 12:09:45,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 12:09:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:09:45,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2022-11-20 12:09:45,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 139 transitions, 538 flow. Second operand has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:45,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:45,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2022-11-20 12:09:45,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:46,021 INFO L130 PetriNetUnfolder]: 40/411 cut-off events. [2022-11-20 12:09:46,021 INFO L131 PetriNetUnfolder]: For 2287/2343 co-relation queries the response was YES. [2022-11-20 12:09:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 411 events. 40/411 cut-off events. For 2287/2343 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1527 event pairs, 11 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 1145. Up to 58 conditions per place. [2022-11-20 12:09:46,027 INFO L137 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2022-11-20 12:09:46,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 153 transitions, 697 flow [2022-11-20 12:09:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:09:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:09:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2022-11-20 12:09:46,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-11-20 12:09:46,031 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2022-11-20 12:09:46,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2022-11-20 12:09:46,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:46,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2022-11-20 12:09:46,036 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) [2022-11-20 12:09:46,039 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) [2022-11-20 12:09:46,040 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) [2022-11-20 12:09:46,041 INFO L175 Difference]: Start difference. First operand has 194 places, 139 transitions, 538 flow. Second operand 12 states and 1385 transitions. [2022-11-20 12:09:46,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 153 transitions, 697 flow [2022-11-20 12:09:46,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 153 transitions, 558 flow, removed 57 selfloop flow, removed 23 redundant places. [2022-11-20 12:09:46,051 INFO L231 Difference]: Finished difference. Result has 161 places, 143 transitions, 484 flow [2022-11-20 12:09:46,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=484, PETRI_PLACES=161, PETRI_TRANSITIONS=143} [2022-11-20 12:09:46,052 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 31 predicate places. [2022-11-20 12:09:46,052 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 143 transitions, 484 flow [2022-11-20 12:09:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:46,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:46,054 INFO L209 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] [2022-11-20 12:09:46,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:09:46,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:09:46,262 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1893050794, now seen corresponding path program 2 times [2022-11-20 12:09:46,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011626935] [2022-11-20 12:09:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:47,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011626935] [2022-11-20 12:09:47,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011626935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953379529] [2022-11-20 12:09:47,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:09:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:47,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:47,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:09:47,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:09:47,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:09:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:09:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:48,969 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:09:48,970 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:09:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:49,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:49,397 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 12:09:49,397 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:50,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953379529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:09:50,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:09:50,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-11-20 12:09:50,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842616937] [2022-11-20 12:09:50,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:50,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 12:09:50,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:50,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 12:09:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:09:50,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-11-20 12:09:50,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 143 transitions, 484 flow. Second operand has 41 states, 41 states have (on average 93.97560975609755) internal successors, (3853), 41 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:50,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:50,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-11-20 12:09:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:54,250 INFO L130 PetriNetUnfolder]: 697/2550 cut-off events. [2022-11-20 12:09:54,250 INFO L131 PetriNetUnfolder]: For 2200/2284 co-relation queries the response was YES. [2022-11-20 12:09:54,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 2550 events. 697/2550 cut-off events. For 2200/2284 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20938 event pairs, 68 based on Foata normal form. 42/2437 useless extension candidates. Maximal degree in co-relation 5711. Up to 322 conditions per place. [2022-11-20 12:09:54,270 INFO L137 encePairwiseOnDemand]: 118/145 looper letters, 158 selfloop transitions, 96 changer transitions 0/339 dead transitions. [2022-11-20 12:09:54,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 339 transitions, 1868 flow [2022-11-20 12:09:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:09:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 12:09:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3859 transitions. [2022-11-20 12:09:54,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653448275862069 [2022-11-20 12:09:54,288 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3859 transitions. [2022-11-20 12:09:54,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3859 transitions. [2022-11-20 12:09:54,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:54,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3859 transitions. [2022-11-20 12:09:54,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 96.475) internal successors, (3859), 40 states have internal predecessors, (3859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:54,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:54,321 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:54,322 INFO L175 Difference]: Start difference. First operand has 161 places, 143 transitions, 484 flow. Second operand 40 states and 3859 transitions. [2022-11-20 12:09:54,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 339 transitions, 1868 flow [2022-11-20 12:09:54,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 339 transitions, 1777 flow, removed 41 selfloop flow, removed 6 redundant places. [2022-11-20 12:09:54,339 INFO L231 Difference]: Finished difference. Result has 215 places, 222 transitions, 1331 flow [2022-11-20 12:09:54,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=461, 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=40, PETRI_FLOW=1331, PETRI_PLACES=215, PETRI_TRANSITIONS=222} [2022-11-20 12:09:54,340 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2022-11-20 12:09:54,340 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 222 transitions, 1331 flow [2022-11-20 12:09:54,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.97560975609755) internal successors, (3853), 41 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:54,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:54,343 INFO L209 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] [2022-11-20 12:09:54,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 12:09:54,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:09:54,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 425517590, now seen corresponding path program 3 times [2022-11-20 12:09:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:54,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990545358] [2022-11-20 12:09:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990545358] [2022-11-20 12:09:55,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990545358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:55,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864528580] [2022-11-20 12:09:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:09:55,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:55,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:55,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:09:55,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:09:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:09:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:09:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:56,390 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:09:56,391 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:09:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:09:56,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:56,545 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 12:09:56,545 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:09:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864528580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:09:56,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:09:56,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 23 [2022-11-20 12:09:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977032281] [2022-11-20 12:09:56,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:56,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:09:56,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:09:56,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:09:56,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2022-11-20 12:09:56,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 222 transitions, 1331 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) [2022-11-20 12:09:56,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:09:56,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2022-11-20 12:09:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:09:59,035 INFO L130 PetriNetUnfolder]: 891/3019 cut-off events. [2022-11-20 12:09:59,035 INFO L131 PetriNetUnfolder]: For 17242/17846 co-relation queries the response was YES. [2022-11-20 12:09:59,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10480 conditions, 3019 events. 891/3019 cut-off events. For 17242/17846 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 25598 event pairs, 155 based on Foata normal form. 234/3094 useless extension candidates. Maximal degree in co-relation 10439. Up to 950 conditions per place. [2022-11-20 12:09:59,079 INFO L137 encePairwiseOnDemand]: 122/145 looper letters, 137 selfloop transitions, 105 changer transitions 0/327 dead transitions. [2022-11-20 12:09:59,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 327 transitions, 2794 flow [2022-11-20 12:09:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 12:09:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 12:09:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3054 transitions. [2022-11-20 12:09:59,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6581896551724138 [2022-11-20 12:09:59,087 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3054 transitions. [2022-11-20 12:09:59,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3054 transitions. [2022-11-20 12:09:59,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:09:59,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3054 transitions. [2022-11-20 12:09:59,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.4375) internal successors, (3054), 32 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:59,107 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) [2022-11-20 12:09:59,109 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) [2022-11-20 12:09:59,110 INFO L175 Difference]: Start difference. First operand has 215 places, 222 transitions, 1331 flow. Second operand 32 states and 3054 transitions. [2022-11-20 12:09:59,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 327 transitions, 2794 flow [2022-11-20 12:09:59,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 327 transitions, 2637 flow, removed 67 selfloop flow, removed 10 redundant places. [2022-11-20 12:09:59,165 INFO L231 Difference]: Finished difference. Result has 246 places, 280 transitions, 2251 flow [2022-11-20 12:09:59,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2251, PETRI_PLACES=246, PETRI_TRANSITIONS=280} [2022-11-20 12:09:59,167 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 116 predicate places. [2022-11-20 12:09:59,167 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 280 transitions, 2251 flow [2022-11-20 12:09:59,168 INFO L496 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) [2022-11-20 12:09:59,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:09:59,168 INFO L209 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] [2022-11-20 12:09:59,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:09:59,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:09:59,376 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:09:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1474983898, now seen corresponding path program 4 times [2022-11-20 12:09:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:59,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180540656] [2022-11-20 12:09:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:10:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180540656] [2022-11-20 12:10:01,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180540656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:10:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151811647] [2022-11-20 12:10:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:10:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:10:01,195 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:10:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:10:01,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:10:01,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:10:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:10:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:10:02,561 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:10:02,562 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:10:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:02,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:10:02,978 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 12:10:02,978 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:04,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151811647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:10:04,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:10:04,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 44 [2022-11-20 12:10:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297108451] [2022-11-20 12:10:04,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:10:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 12:10:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:10:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 12:10:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 12:10:04,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2022-11-20 12:10:04,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 280 transitions, 2251 flow. Second operand has 44 states, 44 states have (on average 76.56818181818181) internal successors, (3369), 44 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:04,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:10:04,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2022-11-20 12:10:04,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:10:09,325 INFO L130 PetriNetUnfolder]: 970/3497 cut-off events. [2022-11-20 12:10:09,325 INFO L131 PetriNetUnfolder]: For 27781/28421 co-relation queries the response was YES. [2022-11-20 12:10:09,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13119 conditions, 3497 events. 970/3497 cut-off events. For 27781/28421 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 31662 event pairs, 165 based on Foata normal form. 360/3734 useless extension candidates. Maximal degree in co-relation 13068. Up to 602 conditions per place. [2022-11-20 12:10:09,369 INFO L137 encePairwiseOnDemand]: 113/145 looper letters, 156 selfloop transitions, 197 changer transitions 0/424 dead transitions. [2022-11-20 12:10:09,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 424 transitions, 4500 flow [2022-11-20 12:10:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 12:10:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-20 12:10:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3566 transitions. [2022-11-20 12:10:09,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.534632683658171 [2022-11-20 12:10:09,378 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3566 transitions. [2022-11-20 12:10:09,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3566 transitions. [2022-11-20 12:10:09,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:10:09,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3566 transitions. [2022-11-20 12:10:09,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 77.52173913043478) internal successors, (3566), 46 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:09,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:09,401 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:09,401 INFO L175 Difference]: Start difference. First operand has 246 places, 280 transitions, 2251 flow. Second operand 46 states and 3566 transitions. [2022-11-20 12:10:09,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 424 transitions, 4500 flow [2022-11-20 12:10:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 424 transitions, 4312 flow, removed 71 selfloop flow, removed 19 redundant places. [2022-11-20 12:10:09,539 INFO L231 Difference]: Finished difference. Result has 283 places, 348 transitions, 3712 flow [2022-11-20 12:10:09,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3712, PETRI_PLACES=283, PETRI_TRANSITIONS=348} [2022-11-20 12:10:09,541 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 153 predicate places. [2022-11-20 12:10:09,541 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 348 transitions, 3712 flow [2022-11-20 12:10:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.56818181818181) internal successors, (3369), 44 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:09,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:10:09,543 INFO L209 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] [2022-11-20 12:10:09,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:10:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:09,750 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:10:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:10:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 356347948, now seen corresponding path program 5 times [2022-11-20 12:10:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:10:09,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856799244] [2022-11-20 12:10:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:10:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:10:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:10:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856799244] [2022-11-20 12:10:11,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856799244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:10:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629839698] [2022-11-20 12:10:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:10:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:10:11,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:10:11,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:10:11,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:10:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:10:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 12:10:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:10:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:10:12,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:10:13,220 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:10:13,220 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:10:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:13,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:10:13,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:10:13,779 INFO L350 Elim1Store]: Elim1 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 41 [2022-11-20 12:10:13,786 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 18 [2022-11-20 12:10:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629839698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:10:15,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:10:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 56 [2022-11-20 12:10:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676623701] [2022-11-20 12:10:15,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:10:15,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:10:15,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:10:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:10:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2785, Unknown=1, NotChecked=0, Total=3080 [2022-11-20 12:10:15,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2022-11-20 12:10:15,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 348 transitions, 3712 flow. Second operand has 56 states, 56 states have (on average 88.30357142857143) internal successors, (4945), 56 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:15,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:10:15,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2022-11-20 12:10:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:10:23,046 INFO L130 PetriNetUnfolder]: 1445/5169 cut-off events. [2022-11-20 12:10:23,046 INFO L131 PetriNetUnfolder]: For 62045/63222 co-relation queries the response was YES. [2022-11-20 12:10:23,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21365 conditions, 5169 events. 1445/5169 cut-off events. For 62045/63222 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 51094 event pairs, 284 based on Foata normal form. 611/5561 useless extension candidates. Maximal degree in co-relation 21303. Up to 777 conditions per place. [2022-11-20 12:10:23,128 INFO L137 encePairwiseOnDemand]: 118/145 looper letters, 219 selfloop transitions, 243 changer transitions 0/546 dead transitions. [2022-11-20 12:10:23,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 546 transitions, 7198 flow [2022-11-20 12:10:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 12:10:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 12:10:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4334 transitions. [2022-11-20 12:10:23,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6227011494252873 [2022-11-20 12:10:23,145 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4334 transitions. [2022-11-20 12:10:23,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4334 transitions. [2022-11-20 12:10:23,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:10:23,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4334 transitions. [2022-11-20 12:10:23,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 90.29166666666667) internal successors, (4334), 48 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:23,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 145.0) internal successors, (7105), 49 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:23,169 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 145.0) internal successors, (7105), 49 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:23,169 INFO L175 Difference]: Start difference. First operand has 283 places, 348 transitions, 3712 flow. Second operand 48 states and 4334 transitions. [2022-11-20 12:10:23,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 546 transitions, 7198 flow [2022-11-20 12:10:23,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 546 transitions, 6955 flow, removed 83 selfloop flow, removed 25 redundant places. [2022-11-20 12:10:23,504 INFO L231 Difference]: Finished difference. Result has 311 places, 433 transitions, 5600 flow [2022-11-20 12:10:23,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5600, PETRI_PLACES=311, PETRI_TRANSITIONS=433} [2022-11-20 12:10:23,505 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 181 predicate places. [2022-11-20 12:10:23,505 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 433 transitions, 5600 flow [2022-11-20 12:10:23,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 88.30357142857143) internal successors, (4945), 56 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:23,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:10:23,507 INFO L209 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] [2022-11-20 12:10:23,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:10:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:23,715 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:10:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:10:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1420362278, now seen corresponding path program 6 times [2022-11-20 12:10:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:10:23,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655145809] [2022-11-20 12:10:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:10:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:10:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:10:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655145809] [2022-11-20 12:10:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655145809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:10:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591479610] [2022-11-20 12:10:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:10:25,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:10:25,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:10:25,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:10:25,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 12:10:25,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:10:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 12:10:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:10:27,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:10:27,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:10:27,900 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:10:27,900 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:10:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:10:28,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:10:28,470 INFO L350 Elim1Store]: Elim1 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 41 [2022-11-20 12:10:28,476 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 18 [2022-11-20 12:10:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:31,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591479610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:10:31,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:10:31,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2022-11-20 12:10:31,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640117280] [2022-11-20 12:10:31,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:10:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:10:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:10:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:10:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:10:31,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2022-11-20 12:10:31,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 433 transitions, 5600 flow. Second operand has 56 states, 56 states have (on average 88.30357142857143) internal successors, (4945), 56 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:31,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:10:31,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2022-11-20 12:10:31,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:10:37,932 INFO L130 PetriNetUnfolder]: 1661/5767 cut-off events. [2022-11-20 12:10:37,932 INFO L131 PetriNetUnfolder]: For 79686/81206 co-relation queries the response was YES. [2022-11-20 12:10:37,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26128 conditions, 5767 events. 1661/5767 cut-off events. For 79686/81206 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 58329 event pairs, 386 based on Foata normal form. 541/6070 useless extension candidates. Maximal degree in co-relation 26061. Up to 1913 conditions per place. [2022-11-20 12:10:38,016 INFO L137 encePairwiseOnDemand]: 118/145 looper letters, 232 selfloop transitions, 259 changer transitions 0/575 dead transitions. [2022-11-20 12:10:38,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 575 transitions, 8569 flow [2022-11-20 12:10:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 12:10:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-20 12:10:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3692 transitions. [2022-11-20 12:10:38,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6210260723296888 [2022-11-20 12:10:38,030 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3692 transitions. [2022-11-20 12:10:38,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3692 transitions. [2022-11-20 12:10:38,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:10:38,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3692 transitions. [2022-11-20 12:10:38,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 90.04878048780488) internal successors, (3692), 41 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:38,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:38,059 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:38,060 INFO L175 Difference]: Start difference. First operand has 311 places, 433 transitions, 5600 flow. Second operand 41 states and 3692 transitions. [2022-11-20 12:10:38,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 575 transitions, 8569 flow [2022-11-20 12:10:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 575 transitions, 8195 flow, removed 107 selfloop flow, removed 34 redundant places. [2022-11-20 12:10:38,679 INFO L231 Difference]: Finished difference. Result has 327 places, 526 transitions, 7860 flow [2022-11-20 12:10:38,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7860, PETRI_PLACES=327, PETRI_TRANSITIONS=526} [2022-11-20 12:10:38,680 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 197 predicate places. [2022-11-20 12:10:38,680 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 526 transitions, 7860 flow [2022-11-20 12:10:38,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 88.30357142857143) internal successors, (4945), 56 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:38,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:10:38,681 INFO L209 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] [2022-11-20 12:10:38,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:10:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 12:10:38,887 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:10:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:10:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash 496436908, now seen corresponding path program 7 times [2022-11-20 12:10:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:10:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361431093] [2022-11-20 12:10:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:10:38,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:10:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:10:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361431093] [2022-11-20 12:10:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361431093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:10:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339606584] [2022-11-20 12:10:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:10:40,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:10:40,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:10:40,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:10:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:10:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:10:40,996 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:41,308 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:10:41,308 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:42,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:10:42,669 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2022-11-20 12:10:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:42,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:10:43,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:10:43,098 INFO L350 Elim1Store]: Elim1 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 41 [2022-11-20 12:10:43,104 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 18 [2022-11-20 12:10:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339606584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:10:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:10:45,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2022-11-20 12:10:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040480470] [2022-11-20 12:10:45,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:10:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 12:10:45,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:10:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 12:10:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:10:45,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2022-11-20 12:10:45,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 526 transitions, 7860 flow. Second operand has 58 states, 58 states have (on average 84.36206896551724) internal successors, (4893), 58 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:45,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:10:45,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2022-11-20 12:10:45,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:10:56,987 INFO L130 PetriNetUnfolder]: 1988/6746 cut-off events. [2022-11-20 12:10:56,987 INFO L131 PetriNetUnfolder]: For 135500/137517 co-relation queries the response was YES. [2022-11-20 12:10:57,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35346 conditions, 6746 events. 1988/6746 cut-off events. For 135500/137517 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 69915 event pairs, 424 based on Foata normal form. 607/7074 useless extension candidates. Maximal degree in co-relation 35276. Up to 1038 conditions per place. [2022-11-20 12:10:57,075 INFO L137 encePairwiseOnDemand]: 120/145 looper letters, 326 selfloop transitions, 284 changer transitions 0/691 dead transitions. [2022-11-20 12:10:57,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 691 transitions, 11872 flow [2022-11-20 12:10:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 12:10:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-20 12:10:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4353 transitions. [2022-11-20 12:10:57,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6004137931034482 [2022-11-20 12:10:57,083 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4353 transitions. [2022-11-20 12:10:57,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4353 transitions. [2022-11-20 12:10:57,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:10:57,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4353 transitions. [2022-11-20 12:10:57,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 87.06) internal successors, (4353), 50 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:57,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:57,103 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:57,104 INFO L175 Difference]: Start difference. First operand has 327 places, 526 transitions, 7860 flow. Second operand 50 states and 4353 transitions. [2022-11-20 12:10:57,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 691 transitions, 11872 flow [2022-11-20 12:10:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 691 transitions, 11154 flow, removed 254 selfloop flow, removed 30 redundant places. [2022-11-20 12:10:57,788 INFO L231 Difference]: Finished difference. Result has 349 places, 540 transitions, 9109 flow [2022-11-20 12:10:57,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=9109, PETRI_PLACES=349, PETRI_TRANSITIONS=540} [2022-11-20 12:10:57,789 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 219 predicate places. [2022-11-20 12:10:57,789 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 540 transitions, 9109 flow [2022-11-20 12:10:57,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 84.36206896551724) internal successors, (4893), 58 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:57,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:10:57,791 INFO L209 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] [2022-11-20 12:10:57,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:10:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:10:57,992 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:10:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:10:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 389686378, now seen corresponding path program 1 times [2022-11-20 12:10:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:10:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507326558] [2022-11-20 12:10:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:10:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:10:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:11:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:11:01,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:11:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507326558] [2022-11-20 12:11:01,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507326558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:11:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376184442] [2022-11-20 12:11:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:11:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:11:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:11:01,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:11:01,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:11:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:11:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:11:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:11:02,270 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:11:02,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:11:02,914 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:11:05,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:11:05,535 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2022-11-20 12:11:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:11:06,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:11:09,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:11:09,343 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 57 [2022-11-20 12:11:09,350 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 34 [2022-11-20 12:11:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:11:13,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376184442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:11:13,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:11:13,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 37] total 105 [2022-11-20 12:11:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937576914] [2022-11-20 12:11:13,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:11:13,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 12:11:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:11:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 12:11:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=10105, Unknown=1, NotChecked=0, Total=10920 [2022-11-20 12:11:13,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-11-20 12:11:13,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 540 transitions, 9109 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) [2022-11-20 12:11:13,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:11:13,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-11-20 12:11:13,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:11:27,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:11:48,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:11:50,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:11:53,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:11:57,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:17,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:21,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:23,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:40,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:45,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:48,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:51,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:53,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:12:56,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:02,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:04,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:06,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:08,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:10,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:20,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:23,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:28,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:13:34,263 INFO L130 PetriNetUnfolder]: 10968/23135 cut-off events. [2022-11-20 12:13:34,264 INFO L131 PetriNetUnfolder]: For 476517/476537 co-relation queries the response was YES. [2022-11-20 12:13:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138643 conditions, 23135 events. 10968/23135 cut-off events. For 476517/476537 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 231423 event pairs, 2426 based on Foata normal form. 22/23108 useless extension candidates. Maximal degree in co-relation 138564. Up to 9509 conditions per place. [2022-11-20 12:13:34,637 INFO L137 encePairwiseOnDemand]: 104/145 looper letters, 841 selfloop transitions, 812 changer transitions 148/1841 dead transitions. [2022-11-20 12:13:34,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1841 transitions, 32390 flow [2022-11-20 12:13:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-11-20 12:13:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2022-11-20 12:13:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 9045 transitions. [2022-11-20 12:13:34,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35645320197044333 [2022-11-20 12:13:34,655 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 9045 transitions. [2022-11-20 12:13:34,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 9045 transitions. [2022-11-20 12:13:34,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:34,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 9045 transitions. [2022-11-20 12:13:34,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 51.68571428571428) internal successors, (9045), 175 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:34,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 145.0) internal successors, (25520), 176 states have internal predecessors, (25520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:34,712 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 145.0) internal successors, (25520), 176 states have internal predecessors, (25520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:34,712 INFO L175 Difference]: Start difference. First operand has 349 places, 540 transitions, 9109 flow. Second operand 175 states and 9045 transitions. [2022-11-20 12:13:34,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1841 transitions, 32390 flow [2022-11-20 12:13:39,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1841 transitions, 31140 flow, removed 347 selfloop flow, removed 29 redundant places. [2022-11-20 12:13:39,100 INFO L231 Difference]: Finished difference. Result has 544 places, 1207 transitions, 21604 flow [2022-11-20 12:13:39,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=8458, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=21604, PETRI_PLACES=544, PETRI_TRANSITIONS=1207} [2022-11-20 12:13:39,101 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 414 predicate places. [2022-11-20 12:13:39,101 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1207 transitions, 21604 flow [2022-11-20 12:13:39,103 INFO L496 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) [2022-11-20 12:13:39,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:39,103 INFO L209 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] [2022-11-20 12:13:39,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 12:13:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:13:39,310 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:13:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1697467146, now seen corresponding path program 2 times [2022-11-20 12:13:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:39,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261521123] [2022-11-20 12:13:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261521123] [2022-11-20 12:13:43,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261521123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282415421] [2022-11-20 12:13:43,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:43,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:43,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:43,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:43,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:13:43,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:13:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:43,756 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:13:44,363 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:13:44,363 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:13:46,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:13:47,467 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 7 [2022-11-20 12:13:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:51,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:51,183 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 57 [2022-11-20 12:13:51,191 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 34 [2022-11-20 12:13:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:55,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282415421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:55,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:55,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 37] total 105 [2022-11-20 12:13:55,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088867432] [2022-11-20 12:13:55,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:55,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 12:13:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 12:13:55,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=10131, Unknown=2, NotChecked=0, Total=10920 [2022-11-20 12:13:55,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 145 [2022-11-20 12:13:55,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1207 transitions, 21604 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) [2022-11-20 12:13:55,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:55,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 145 [2022-11-20 12:13:55,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:40,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:46,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:49,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:51,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:53,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:55,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:14:57,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:16,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:17,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:17,985 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (= (mod (+ c_~C~0 c_~y~0) 4294967296) (mod c_~x~0 4294967296))) (.cse1 (not (<= 0 c_~q_back~0))) (.cse3 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse2 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (<= c_~N~0 c_~s~0) .cse0 (<= c_~y~0 c_~x~0) (or .cse1 (and .cse0 (= c_~N~0 (select (select |c_#memory_int| c_~q~0.base) .cse2))) .cse3 .cse4) (= c_~s~0 c_~N~0) (<= c_~s~0 c_~N~0) (or .cse1 .cse4 (and (= c_~N~0 (+ c_~s~0 |c_thread2Thread1of1ForFork1_~j~0#1|)) .cse0)) (= c_~q~0.offset 0) (or .cse1 .cse3 .cse4 (and (let ((.cse5 (* 4294967295 c_~x~0))) (< (* (div (+ .cse5 c_~y~0 4294967295) 4294967296) 4294967296) (+ .cse5 c_~y~0 1))) (forall ((v_ArrVal_432 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) c_~q~0.base) .cse2))))) (<= c_~x~0 c_~y~0))) is different from false [2022-11-20 12:15:31,622 WARN L233 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:36,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:38,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:40,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:42,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:43,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:46,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:48,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:49,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:50,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:55,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:15:55,313 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x~0 4294967296))) (let ((.cse0 (= (mod (+ c_~C~0 c_~y~0) 4294967296) .cse6)) (.cse1 (not (<= 0 c_~q_back~0))) (.cse3 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse2 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and .cse0 (or .cse1 (and .cse0 (= c_~N~0 (select (select |c_#memory_int| c_~q~0.base) .cse2))) .cse3 .cse4) (= c_~s~0 c_~N~0) (or .cse1 .cse4 (and (= c_~N~0 (+ c_~s~0 |c_thread2Thread1of1ForFork1_~j~0#1|)) .cse0)) (or .cse1 .cse3 .cse4 (and (let ((.cse5 (* 4294967295 c_~x~0))) (< (* (div (+ .cse5 c_~y~0 4294967295) 4294967296) 4294967296) (+ .cse5 c_~y~0 1))) (forall ((v_ArrVal_432 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) c_~q~0.base) .cse2))))) (= .cse6 (mod c_~y~0 4294967296))))) is different from false [2022-11-20 12:15:56,944 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x~0 4294967296))) (let ((.cse0 (= (mod (+ c_~C~0 c_~y~0) 4294967296) .cse6)) (.cse5 (= c_~s~0 c_~N~0)) (.cse1 (not (<= 0 c_~q_back~0))) (.cse3 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse2 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and .cse0 (or .cse1 (and .cse0 (= c_~N~0 (select (select |c_#memory_int| c_~q~0.base) .cse2))) .cse3 .cse4) .cse5 (or .cse1 .cse4 (and .cse5 (= .cse6 (mod c_~y~0 4294967296)))) (or .cse1 .cse3 .cse4 (and (let ((.cse7 (* 4294967295 c_~x~0))) (< (* (div (+ .cse7 c_~y~0 4294967295) 4294967296) 4294967296) (+ .cse7 c_~y~0 1))) (forall ((v_ArrVal_432 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) c_~q~0.base) .cse2)))))))) is different from false [2022-11-20 12:16:09,411 WARN L233 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:16:11,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:13,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:23,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:27,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:33,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:35,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:38,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:40,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:42,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:16:44,400 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x~0 4294967296))) (let ((.cse1 (not (<= 0 c_~q_back~0))) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse3 (+ (* c_~q_front~0 4) c_~q~0.offset)) (.cse2 (= (mod (+ c_~C~0 c_~y~0) 4294967296) .cse6)) (.cse0 (= c_~s~0 c_~N~0))) (and .cse0 (or .cse1 (and .cse2 (= c_~N~0 (select (select |c_#memory_int| c_~q~0.base) .cse3))) .cse4 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (or .cse1 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) .cse4 (and (let ((.cse5 (* 4294967295 c_~x~0))) (< (* (div (+ .cse5 c_~y~0 4294967295) 4294967296) 4294967296) (+ .cse5 c_~y~0 1))) (forall ((v_ArrVal_432 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) c_~q~0.base) .cse3))))) (or (and .cse2 .cse0) (not (= |c_thread2Thread1of1ForFork1_~j~0#1| 0))) (= .cse6 (mod c_~y~0 4294967296))))) is different from false [2022-11-20 12:17:12,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:17:14,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:17:28,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:18:29,642 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (div c_~x~0 4294967296)) (.cse8 (div c_~y~0 4294967296))) (let ((.cse5 (* .cse8 4294967296)) (.cse6 (+ (* .cse7 4294967296) c_~y~0)) (.cse0 (= (mod (+ c_~C~0 c_~y~0) 4294967296) (mod c_~x~0 4294967296))) (.cse1 (not (<= 0 c_~q_back~0))) (.cse3 (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse2 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (<= c_~N~0 c_~s~0) .cse0 (or .cse1 (and .cse0 (= c_~N~0 (select (select |c_#memory_int| c_~q~0.base) .cse2))) .cse3 .cse4) (= c_~s~0 c_~N~0) (not (<= (+ .cse5 c_~x~0 1) .cse6)) (<= (+ .cse5 c_~x~0) .cse6) (<= .cse7 .cse8) (or .cse1 .cse4 (and (= c_~N~0 (+ c_~s~0 |c_thread2Thread1of1ForFork1_~j~0#1|)) .cse0)) (or .cse1 .cse3 .cse4 (and (let ((.cse9 (* 4294967295 c_~x~0))) (< (* (div (+ .cse9 c_~y~0 4294967295) 4294967296) 4294967296) (+ .cse9 c_~y~0 1))) (forall ((v_ArrVal_432 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) c_~q~0.base) .cse2))))) (< c_~s~0 (+ c_~N~0 1))))) is different from false [2022-11-20 12:18:35,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:18:39,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:18:47,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:18:51,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:18:59,230 INFO L130 PetriNetUnfolder]: 27978/56748 cut-off events. [2022-11-20 12:18:59,230 INFO L131 PetriNetUnfolder]: For 1468262/1468304 co-relation queries the response was YES. [2022-11-20 12:19:00,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421636 conditions, 56748 events. 27978/56748 cut-off events. For 1468262/1468304 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 611977 event pairs, 2675 based on Foata normal form. 50/56624 useless extension candidates. Maximal degree in co-relation 421510. Up to 15548 conditions per place. [2022-11-20 12:19:00,504 INFO L137 encePairwiseOnDemand]: 102/145 looper letters, 2183 selfloop transitions, 3491 changer transitions 146/5860 dead transitions. [2022-11-20 12:19:00,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 5860 transitions, 113986 flow [2022-11-20 12:19:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2022-11-20 12:19:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2022-11-20 12:19:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 21758 transitions. [2022-11-20 12:19:00,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36421158352862404 [2022-11-20 12:19:00,533 INFO L72 ComplementDD]: Start complementDD. Operand 412 states and 21758 transitions. [2022-11-20 12:19:00,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 21758 transitions. [2022-11-20 12:19:00,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:19:00,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 412 states and 21758 transitions. [2022-11-20 12:19:00,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 413 states, 412 states have (on average 52.810679611650485) internal successors, (21758), 412 states have internal predecessors, (21758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:00,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 413 states, 413 states have (on average 145.0) internal successors, (59885), 413 states have internal predecessors, (59885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:00,648 INFO L81 ComplementDD]: Finished complementDD. Result has 413 states, 413 states have (on average 145.0) internal successors, (59885), 413 states have internal predecessors, (59885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:00,649 INFO L175 Difference]: Start difference. First operand has 544 places, 1207 transitions, 21604 flow. Second operand 412 states and 21758 transitions. [2022-11-20 12:19:00,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 5860 transitions, 113986 flow [2022-11-20 12:19:38,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 5860 transitions, 111408 flow, removed 1207 selfloop flow, removed 47 redundant places. [2022-11-20 12:19:38,582 INFO L231 Difference]: Finished difference. Result has 1000 places, 4547 transitions, 93110 flow [2022-11-20 12:19:38,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=20995, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=412, PETRI_FLOW=93110, PETRI_PLACES=1000, PETRI_TRANSITIONS=4547} [2022-11-20 12:19:38,583 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 870 predicate places. [2022-11-20 12:19:38,584 INFO L495 AbstractCegarLoop]: Abstraction has has 1000 places, 4547 transitions, 93110 flow [2022-11-20 12:19:38,584 INFO L496 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) [2022-11-20 12:19:38,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:19:38,584 INFO L209 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] [2022-11-20 12:19:38,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:38,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:19:38,785 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:19:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2004494342, now seen corresponding path program 3 times [2022-11-20 12:19:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:19:38,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329813509] [2022-11-20 12:19:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:38,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:19:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:19:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329813509] [2022-11-20 12:19:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329813509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:19:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091284557] [2022-11-20 12:19:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:19:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:19:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:19:42,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:19:42,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9fb5348-febe-4b30-b55b-d2db31178381/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:19:42,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:19:42,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:19:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 12:19:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:44,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:19:44,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:19:46,088 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 12:19:46,088 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 10 [2022-11-20 12:19:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:19:46,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:49,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:19:49,560 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 55 [2022-11-20 12:19:49,567 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 32 [2022-11-20 12:19:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:19:53,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091284557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:53,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:19:53,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 29, 29] total 86 [2022-11-20 12:19:53,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375596211] [2022-11-20 12:19:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:53,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 12:19:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:19:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 12:19:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=6886, Unknown=3, NotChecked=0, Total=7310 [2022-11-20 12:19:53,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 145 [2022-11-20 12:19:53,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 4547 transitions, 93110 flow. Second operand has 86 states, 86 states have (on average 53.51162790697674) internal successors, (4602), 86 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:53,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:19:53,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 145 [2022-11-20 12:19:53,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand