./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a --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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- 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-b5237d8 [2022-11-21 16:26:10,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:26:10,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:26:10,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:26:10,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:26:10,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:26:10,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:26:10,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:26:10,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:26:10,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:26:10,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:26:10,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:26:10,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:26:10,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:26:10,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:26:10,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:26:10,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:26:10,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:26:10,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:26:10,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:26:10,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:26:10,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:26:10,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:26:10,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:26:10,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:26:10,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:26:10,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:26:10,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:26:10,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:26:10,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:26:10,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:26:10,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:26:10,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:26:10,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:26:10,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:26:10,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:26:10,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:26:10,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:26:10,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:26:10,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:26:10,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:26:10,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:26:10,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:26:10,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:26:10,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:26:10,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:26:10,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:26:10,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:26:10,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:26:10,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:26:10,954 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:26:10,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:26:10,956 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:26:10,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:26:10,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:26:10,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:26:10,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:26:10,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:26:10,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:26:10,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:26:10,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:26:10,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:26:10,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:26:10,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:26:10,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:26:10,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:26:10,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:26:10,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:26:10,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:26:10,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:26:10,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:26:10,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:26:10,962 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:26:10,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:26:10,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:26:10,963 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_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-11-21 16:26:11,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:26:11,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:26:11,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:26:11,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:26:11,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:26:11,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-11-21 16:26:14,292 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:26:14,508 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:26:14,508 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-11-21 16:26:14,515 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/data/cea816692/6cfb065db7f040ea8aaaffe6a25a5911/FLAGc0e2a447b [2022-11-21 16:26:14,530 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/data/cea816692/6cfb065db7f040ea8aaaffe6a25a5911 [2022-11-21 16:26:14,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:26:14,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:26:14,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:26:14,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:26:14,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:26:14,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3629c424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14, skipping insertion in model container [2022-11-21 16:26:14,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:26:14,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:26:14,751 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_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-11-21 16:26:14,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:26:14,765 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:26:14,791 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_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-11-21 16:26:14,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:26:14,806 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:26:14,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14 WrapperNode [2022-11-21 16:26:14,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:26:14,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:26:14,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:26:14,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:26:14,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,854 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-21 16:26:14,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:26:14,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:26:14,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:26:14,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:26:14,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:26:14,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:26:14,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:26:14,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:26:14,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (1/1) ... [2022-11-21 16:26:14,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:26:14,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:26:14,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:26:14,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:26:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:26:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:26:14,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:26:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:26:14,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:26:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:26:14,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:26:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:26:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:26:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:26:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:26:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:26:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:26:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:26:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:26:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:26:14,976 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:26:15,174 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:26:15,176 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:26:15,444 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:26:15,524 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:26:15,524 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:26:15,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:26:15 BoogieIcfgContainer [2022-11-21 16:26:15,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:26:15,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:26:15,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:26:15,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:26:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:26:14" (1/3) ... [2022-11-21 16:26:15,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dafae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:26:15, skipping insertion in model container [2022-11-21 16:26:15,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:26:14" (2/3) ... [2022-11-21 16:26:15,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dafae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:26:15, skipping insertion in model container [2022-11-21 16:26:15,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:26:15" (3/3) ... [2022-11-21 16:26:15,548 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-11-21 16:26:15,558 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:26:15,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:26:15,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:26:15,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:26:15,704 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:26:15,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-11-21 16:26:15,805 INFO L130 PetriNetUnfolder]: 8/112 cut-off events. [2022-11-21 16:26:15,806 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:26:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-21 16:26:15,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-11-21 16:26:15,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-11-21 16:26:15,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:26:15,844 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;@638c2b83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:26:15,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:26:15,882 INFO L130 PetriNetUnfolder]: 8/100 cut-off events. [2022-11-21 16:26:15,882 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:26:15,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:15,891 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] [2022-11-21 16:26:15,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1701118085, now seen corresponding path program 1 times [2022-11-21 16:26:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:15,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887408827] [2022-11-21 16:26:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:16,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887408827] [2022-11-21 16:26:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887408827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:16,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:16,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:26:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558350792] [2022-11-21 16:26:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:16,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:26:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:26:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:26:16,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 115 [2022-11-21 16:26:16,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:16,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:16,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 115 [2022-11-21 16:26:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:16,368 INFO L130 PetriNetUnfolder]: 59/245 cut-off events. [2022-11-21 16:26:16,368 INFO L131 PetriNetUnfolder]: For 67/68 co-relation queries the response was YES. [2022-11-21 16:26:16,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 245 events. 59/245 cut-off events. For 67/68 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 763 event pairs, 23 based on Foata normal form. 52/266 useless extension candidates. Maximal degree in co-relation 255. Up to 85 conditions per place. [2022-11-21 16:26:16,373 INFO L137 encePairwiseOnDemand]: 110/115 looper letters, 10 selfloop transitions, 0 changer transitions 2/96 dead transitions. [2022-11-21 16:26:16,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 230 flow [2022-11-21 16:26:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:26:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:26:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 213 transitions. [2022-11-21 16:26:16,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9260869565217391 [2022-11-21 16:26:16,386 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 213 transitions. [2022-11-21 16:26:16,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 213 transitions. [2022-11-21 16:26:16,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:16,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 213 transitions. [2022-11-21 16:26:16,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:16,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:16,398 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:16,399 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 2 states and 213 transitions. [2022-11-21 16:26:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 230 flow [2022-11-21 16:26:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-21 16:26:16,407 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 194 flow [2022-11-21 16:26:16,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2022-11-21 16:26:16,412 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2022-11-21 16:26:16,412 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 194 flow [2022-11-21 16:26:16,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:16,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:16,413 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] [2022-11-21 16:26:16,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:26:16,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2022-11-21 16:26:16,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:16,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387411233] [2022-11-21 16:26:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:17,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387411233] [2022-11-21 16:26:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387411233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:17,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:17,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:26:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560952212] [2022-11-21 16:26:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:17,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:26:17,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:26:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:26:17,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-11-21 16:26:17,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:17,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:17,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-11-21 16:26:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:18,275 INFO L130 PetriNetUnfolder]: 349/794 cut-off events. [2022-11-21 16:26:18,275 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-21 16:26:18,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 794 events. 349/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4008 event pairs, 48 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1391. Up to 295 conditions per place. [2022-11-21 16:26:18,290 INFO L137 encePairwiseOnDemand]: 105/115 looper letters, 71 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2022-11-21 16:26:18,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 143 transitions, 477 flow [2022-11-21 16:26:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:26:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:26:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 710 transitions. [2022-11-21 16:26:18,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2022-11-21 16:26:18,301 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 710 transitions. [2022-11-21 16:26:18,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 710 transitions. [2022-11-21 16:26:18,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:18,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 710 transitions. [2022-11-21 16:26:18,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.88888888888889) internal successors, (710), 9 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:18,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:18,313 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:18,313 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 194 flow. Second operand 9 states and 710 transitions. [2022-11-21 16:26:18,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 143 transitions, 477 flow [2022-11-21 16:26:18,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 143 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:26:18,319 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 291 flow [2022-11-21 16:26:18,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=291, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2022-11-21 16:26:18,320 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 5 predicate places. [2022-11-21 16:26:18,321 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 291 flow [2022-11-21 16:26:18,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:18,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:18,323 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] [2022-11-21 16:26:18,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:26:18,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash 667835378, now seen corresponding path program 1 times [2022-11-21 16:26:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594138236] [2022-11-21 16:26:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:19,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594138236] [2022-11-21 16:26:19,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594138236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:26:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310590313] [2022-11-21 16:26:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:19,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:26:19,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:26:19,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:26:19,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:26:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:26:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:26:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:19,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:26:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:20,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310590313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:26:20,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:26:20,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2022-11-21 16:26:20,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236212062] [2022-11-21 16:26:20,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:26:20,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:26:20,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:20,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:26:20,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:26:20,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 115 [2022-11-21 16:26:20,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 291 flow. Second operand has 24 states, 24 states have (on average 69.875) internal successors, (1677), 24 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:20,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:20,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 115 [2022-11-21 16:26:20,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:23,852 INFO L130 PetriNetUnfolder]: 1602/3216 cut-off events. [2022-11-21 16:26:23,852 INFO L131 PetriNetUnfolder]: For 1189/1219 co-relation queries the response was YES. [2022-11-21 16:26:23,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 3216 events. 1602/3216 cut-off events. For 1189/1219 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22381 event pairs, 39 based on Foata normal form. 93/3066 useless extension candidates. Maximal degree in co-relation 7009. Up to 478 conditions per place. [2022-11-21 16:26:23,879 INFO L137 encePairwiseOnDemand]: 95/115 looper letters, 236 selfloop transitions, 110 changer transitions 0/400 dead transitions. [2022-11-21 16:26:23,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 400 transitions, 1848 flow [2022-11-21 16:26:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:26:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 16:26:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2956 transitions. [2022-11-21 16:26:23,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6590858416945373 [2022-11-21 16:26:23,888 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2956 transitions. [2022-11-21 16:26:23,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2956 transitions. [2022-11-21 16:26:23,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:23,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2956 transitions. [2022-11-21 16:26:23,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 75.7948717948718) internal successors, (2956), 39 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:23,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 115.0) internal successors, (4600), 40 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:23,908 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 115.0) internal successors, (4600), 40 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:23,908 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 291 flow. Second operand 39 states and 2956 transitions. [2022-11-21 16:26:23,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 400 transitions, 1848 flow [2022-11-21 16:26:23,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 400 transitions, 1844 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:26:23,923 INFO L231 Difference]: Finished difference. Result has 169 places, 229 transitions, 1276 flow [2022-11-21 16:26:23,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1276, PETRI_PLACES=169, PETRI_TRANSITIONS=229} [2022-11-21 16:26:23,925 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 66 predicate places. [2022-11-21 16:26:23,925 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 229 transitions, 1276 flow [2022-11-21 16:26:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.875) internal successors, (1677), 24 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:23,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:23,926 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] [2022-11-21 16:26:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:26:24,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:26:24,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -18491406, now seen corresponding path program 1 times [2022-11-21 16:26:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:24,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497713395] [2022-11-21 16:26:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:24,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:24,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497713395] [2022-11-21 16:26:24,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497713395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:26:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876112041] [2022-11-21 16:26:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:24,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:26:24,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:26:24,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:26:24,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:26:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:26:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:26:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:25,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:26:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:25,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876112041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:26:25,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:26:25,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-11-21 16:26:25,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171379408] [2022-11-21 16:26:25,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:26:25,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:26:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:26:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:26:25,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-11-21 16:26:25,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 229 transitions, 1276 flow. Second operand has 18 states, 18 states have (on average 72.44444444444444) internal successors, (1304), 18 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:25,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:25,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-11-21 16:26:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:27,685 INFO L130 PetriNetUnfolder]: 2918/5553 cut-off events. [2022-11-21 16:26:27,685 INFO L131 PetriNetUnfolder]: For 27551/27683 co-relation queries the response was YES. [2022-11-21 16:26:27,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 5553 events. 2918/5553 cut-off events. For 27551/27683 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41636 event pairs, 161 based on Foata normal form. 213/5486 useless extension candidates. Maximal degree in co-relation 18608. Up to 811 conditions per place. [2022-11-21 16:26:27,756 INFO L137 encePairwiseOnDemand]: 98/115 looper letters, 474 selfloop transitions, 66 changer transitions 0/605 dead transitions. [2022-11-21 16:26:27,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 605 transitions, 4797 flow [2022-11-21 16:26:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:26:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 16:26:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1529 transitions. [2022-11-21 16:26:27,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6647826086956522 [2022-11-21 16:26:27,761 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1529 transitions. [2022-11-21 16:26:27,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1529 transitions. [2022-11-21 16:26:27,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:27,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1529 transitions. [2022-11-21 16:26:27,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 76.45) internal successors, (1529), 20 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:27,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 115.0) internal successors, (2415), 21 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:27,772 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 115.0) internal successors, (2415), 21 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:27,772 INFO L175 Difference]: Start difference. First operand has 169 places, 229 transitions, 1276 flow. Second operand 20 states and 1529 transitions. [2022-11-21 16:26:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 605 transitions, 4797 flow [2022-11-21 16:26:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 605 transitions, 4165 flow, removed 291 selfloop flow, removed 8 redundant places. [2022-11-21 16:26:27,922 INFO L231 Difference]: Finished difference. Result has 186 places, 285 transitions, 1651 flow [2022-11-21 16:26:27,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1651, PETRI_PLACES=186, PETRI_TRANSITIONS=285} [2022-11-21 16:26:27,925 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 83 predicate places. [2022-11-21 16:26:27,925 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 285 transitions, 1651 flow [2022-11-21 16:26:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 72.44444444444444) internal successors, (1304), 18 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:27,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:27,927 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] [2022-11-21 16:26:27,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:26:28,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:26:28,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 294431673, now seen corresponding path program 1 times [2022-11-21 16:26:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:28,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50941514] [2022-11-21 16:26:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:28,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50941514] [2022-11-21 16:26:28,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50941514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:26:28,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:26:28,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:26:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857305868] [2022-11-21 16:26:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:26:28,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:26:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:26:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:26:28,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-11-21 16:26:28,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 285 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:28,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:28,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-11-21 16:26:28,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:26:29,794 INFO L130 PetriNetUnfolder]: 1642/3697 cut-off events. [2022-11-21 16:26:29,795 INFO L131 PetriNetUnfolder]: For 17809/18338 co-relation queries the response was YES. [2022-11-21 16:26:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14174 conditions, 3697 events. 1642/3697 cut-off events. For 17809/18338 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29185 event pairs, 186 based on Foata normal form. 152/3783 useless extension candidates. Maximal degree in co-relation 14136. Up to 1183 conditions per place. [2022-11-21 16:26:29,909 INFO L137 encePairwiseOnDemand]: 106/115 looper letters, 162 selfloop transitions, 35 changer transitions 0/319 dead transitions. [2022-11-21 16:26:29,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 319 transitions, 2344 flow [2022-11-21 16:26:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:26:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:26:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2022-11-21 16:26:29,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2022-11-21 16:26:29,912 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 655 transitions. [2022-11-21 16:26:29,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 655 transitions. [2022-11-21 16:26:29,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:26:29,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 655 transitions. [2022-11-21 16:26:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.875) internal successors, (655), 8 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:29,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:29,917 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:29,917 INFO L175 Difference]: Start difference. First operand has 186 places, 285 transitions, 1651 flow. Second operand 8 states and 655 transitions. [2022-11-21 16:26:29,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 319 transitions, 2344 flow [2022-11-21 16:26:30,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 319 transitions, 2137 flow, removed 76 selfloop flow, removed 14 redundant places. [2022-11-21 16:26:30,078 INFO L231 Difference]: Finished difference. Result has 179 places, 284 transitions, 1615 flow [2022-11-21 16:26:30,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1615, PETRI_PLACES=179, PETRI_TRANSITIONS=284} [2022-11-21 16:26:30,081 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-11-21 16:26:30,081 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 284 transitions, 1615 flow [2022-11-21 16:26:30,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:30,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:26:30,083 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] [2022-11-21 16:26:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:26:30,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:26:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:26:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -532841965, now seen corresponding path program 1 times [2022-11-21 16:26:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:26:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254639525] [2022-11-21 16:26:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:26:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:26:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254639525] [2022-11-21 16:26:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254639525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:26:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202344439] [2022-11-21 16:26:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:26:34,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:26:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:26:34,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:26:34,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:26:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:26:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 16:26:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:26:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:36,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:26:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:26:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202344439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:26:47,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:26:47,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 23] total 48 [2022-11-21 16:26:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453795301] [2022-11-21 16:26:47,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:26:47,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:26:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:26:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:26:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:26:47,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 115 [2022-11-21 16:26:47,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 284 transitions, 1615 flow. Second operand has 48 states, 48 states have (on average 66.0625) internal successors, (3171), 48 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:26:47,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:26:47,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 115 [2022-11-21 16:26:47,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:27:29,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-21 16:29:50,888 INFO L130 PetriNetUnfolder]: 37483/73799 cut-off events. [2022-11-21 16:29:50,888 INFO L131 PetriNetUnfolder]: For 142744/142744 co-relation queries the response was YES. [2022-11-21 16:29:51,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243691 conditions, 73799 events. 37483/73799 cut-off events. For 142744/142744 co-relation queries the response was YES. Maximal size of possible extension queue 4224. Compared 819195 event pairs, 539 based on Foata normal form. 75/73730 useless extension candidates. Maximal degree in co-relation 243659. Up to 8542 conditions per place. [2022-11-21 16:29:51,919 INFO L137 encePairwiseOnDemand]: 86/115 looper letters, 3224 selfloop transitions, 3944 changer transitions 802/8021 dead transitions. [2022-11-21 16:29:51,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 8021 transitions, 63695 flow [2022-11-21 16:29:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 429 states. [2022-11-21 16:29:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2022-11-21 16:29:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 30829 transitions. [2022-11-21 16:29:51,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6248910509780075 [2022-11-21 16:29:51,997 INFO L72 ComplementDD]: Start complementDD. Operand 429 states and 30829 transitions. [2022-11-21 16:29:51,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 429 states and 30829 transitions. [2022-11-21 16:29:52,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:52,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 429 states and 30829 transitions. [2022-11-21 16:29:52,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 430 states, 429 states have (on average 71.86247086247086) internal successors, (30829), 429 states have internal predecessors, (30829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:52,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 430 states, 430 states have (on average 115.0) internal successors, (49450), 430 states have internal predecessors, (49450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:52,236 INFO L81 ComplementDD]: Finished complementDD. Result has 430 states, 430 states have (on average 115.0) internal successors, (49450), 430 states have internal predecessors, (49450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:52,237 INFO L175 Difference]: Start difference. First operand has 179 places, 284 transitions, 1615 flow. Second operand 429 states and 30829 transitions. [2022-11-21 16:29:52,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 8021 transitions, 63695 flow [2022-11-21 16:29:54,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 8021 transitions, 63504 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:29:55,148 INFO L231 Difference]: Finished difference. Result has 834 places, 5033 transitions, 47252 flow [2022-11-21 16:29:55,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=429, PETRI_FLOW=47252, PETRI_PLACES=834, PETRI_TRANSITIONS=5033} [2022-11-21 16:29:55,152 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 731 predicate places. [2022-11-21 16:29:55,153 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 5033 transitions, 47252 flow [2022-11-21 16:29:55,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 66.0625) internal successors, (3171), 48 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:55,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:55,155 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] [2022-11-21 16:29:55,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:29:55,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:29:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash 563715031, now seen corresponding path program 2 times [2022-11-21 16:29:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:55,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630097349] [2022-11-21 16:29:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:58,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630097349] [2022-11-21 16:29:58,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630097349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613022192] [2022-11-21 16:29:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:29:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:58,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:58,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1db627-2f7c-4d0c-b09c-b267b05a53fe/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:29:59,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:29:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:29:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:09,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613022192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:09,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:09,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 43 [2022-11-21 16:30:09,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640342281] [2022-11-21 16:30:09,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:09,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:30:09,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:09,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:30:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:30:09,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 115 [2022-11-21 16:30:09,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 5033 transitions, 47252 flow. Second operand has 43 states, 43 states have (on average 68.16279069767442) internal successors, (2931), 43 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:30:09,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:30:09,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 115 [2022-11-21 16:30:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:31:49,957 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 []