./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/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_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/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_482aa4be-6024-4af1-9347-4b537d7409d9/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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- 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 16:18:21,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:18:21,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:18:21,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:18:21,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:18:21,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:18:21,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:18:21,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:18:21,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:18:21,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:18:21,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:18:21,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:18:21,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:18:21,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:18:21,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:18:21,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:18:21,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:18:21,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:18:21,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:18:21,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:18:21,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:18:21,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:18:21,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:18:21,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:18:21,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:18:21,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:18:21,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:18:21,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:18:21,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:18:21,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:18:21,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:18:21,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:18:21,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:18:21,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:18:21,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:18:21,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:18:21,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:18:21,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:18:21,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:18:21,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:18:21,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:18:21,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:18:21,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:18:21,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:18:21,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:18:21,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:18:21,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:18:21,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:18:21,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:18:21,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:18:21,913 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:18:21,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:18:21,915 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:18:21,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:18:21,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:18:21,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:18:21,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:18:21,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:18:21,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:18:21,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:18:21,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:18:21,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:18:21,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:18:21,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:18:21,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:18:21,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:18:21,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:18:21,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:18:21,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:18:21,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:18:21,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:18:21,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:18:21,920 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:18:21,920 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:18:21,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:18:21,921 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_482aa4be-6024-4af1-9347-4b537d7409d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-11-21 16:18:22,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:18:22,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:18:22,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:18:22,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:18:22,266 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:18:22,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-11-21 16:18:25,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:18:25,626 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:18:25,627 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-11-21 16:18:25,635 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/data/5a1c6cafc/6042a385b715425f807a3102e9000fd5/FLAG430024cbb [2022-11-21 16:18:25,650 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/data/5a1c6cafc/6042a385b715425f807a3102e9000fd5 [2022-11-21 16:18:25,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:18:25,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:18:25,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:18:25,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:18:25,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:18:25,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:25,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9facf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25, skipping insertion in model container [2022-11-21 16:18:25,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:25,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:18:25,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:18:25,882 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_482aa4be-6024-4af1-9347-4b537d7409d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-11-21 16:18:25,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:18:25,904 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:18:25,937 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_482aa4be-6024-4af1-9347-4b537d7409d9/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-11-21 16:18:25,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:18:25,959 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:18:25,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25 WrapperNode [2022-11-21 16:18:25,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:18:25,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:18:25,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:18:25,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:18:25,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:25,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,058 INFO L138 Inliner]: procedures = 27, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 346 [2022-11-21 16:18:26,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:18:26,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:18:26,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:18:26,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:18:26,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,139 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:18:26,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:18:26,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:18:26,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:18:26,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (1/1) ... [2022-11-21 16:18:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:18:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:26,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:18:26,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:18:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:18:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:18:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:18:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:18:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:18:26,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:18:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:18:26,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:18:26,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:18:26,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:18:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-21 16:18:26,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-21 16:18:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:18:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:18:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:18:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:18:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:18:26,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:18:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:18:26,247 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 16:18:26,407 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:18:26,410 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:18:26,995 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:18:27,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:18:27,268 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-21 16:18:27,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:18:27 BoogieIcfgContainer [2022-11-21 16:18:27,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:18:27,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:18:27,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:18:27,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:18:27,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:18:25" (1/3) ... [2022-11-21 16:18:27,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5accfc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:18:27, skipping insertion in model container [2022-11-21 16:18:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:18:25" (2/3) ... [2022-11-21 16:18:27,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5accfc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:18:27, skipping insertion in model container [2022-11-21 16:18:27,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:18:27" (3/3) ... [2022-11-21 16:18:27,284 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2022-11-21 16:18:27,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:18:27,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:18:27,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:18:27,310 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:18:27,426 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:18:27,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 265 transitions, 562 flow [2022-11-21 16:18:27,691 INFO L130 PetriNetUnfolder]: 22/261 cut-off events. [2022-11-21 16:18:27,691 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:18:27,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 261 events. 22/261 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 124 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 222. Up to 2 conditions per place. [2022-11-21 16:18:27,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 265 transitions, 562 flow [2022-11-21 16:18:27,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 248 transitions, 520 flow [2022-11-21 16:18:27,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:18:27,732 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;@58742d6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:18:27,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:18:27,786 INFO L130 PetriNetUnfolder]: 22/247 cut-off events. [2022-11-21 16:18:27,786 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:18:27,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:27,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:27,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash -349735355, now seen corresponding path program 1 times [2022-11-21 16:18:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:27,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950126021] [2022-11-21 16:18:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:28,213 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 16:18:28,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:28,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950126021] [2022-11-21 16:18:28,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950126021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:28,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:28,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:18:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492431406] [2022-11-21 16:18:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:28,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:18:28,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:18:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:18:28,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 265 [2022-11-21 16:18:28,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 248 transitions, 520 flow. Second operand has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 16:18:28,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:28,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 265 [2022-11-21 16:18:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:28,484 INFO L130 PetriNetUnfolder]: 124/548 cut-off events. [2022-11-21 16:18:28,484 INFO L131 PetriNetUnfolder]: For 106/107 co-relation queries the response was YES. [2022-11-21 16:18:28,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 548 events. 124/548 cut-off events. For 106/107 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1738 event pairs, 51 based on Foata normal form. 128/613 useless extension candidates. Maximal degree in co-relation 504. Up to 163 conditions per place. [2022-11-21 16:18:28,493 INFO L137 encePairwiseOnDemand]: 250/265 looper letters, 12 selfloop transitions, 0 changer transitions 8/233 dead transitions. [2022-11-21 16:18:28,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 233 transitions, 514 flow [2022-11-21 16:18:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:18:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:18:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-11-21 16:18:28,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9452830188679245 [2022-11-21 16:18:28,517 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-11-21 16:18:28,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-11-21 16:18:28,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:28,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-11-21 16:18:28,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 16:18:28,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 16:18:28,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 16:18:28,541 INFO L175 Difference]: Start difference. First operand has 239 places, 248 transitions, 520 flow. Second operand 2 states and 501 transitions. [2022-11-21 16:18:28,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 233 transitions, 514 flow [2022-11-21 16:18:28,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 233 transitions, 498 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-21 16:18:28,555 INFO L231 Difference]: Finished difference. Result has 232 places, 225 transitions, 458 flow [2022-11-21 16:18:28,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=232, PETRI_TRANSITIONS=225} [2022-11-21 16:18:28,561 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, -7 predicate places. [2022-11-21 16:18:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 225 transitions, 458 flow [2022-11-21 16:18:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 16:18:28,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:28,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:18:28,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1549088294, now seen corresponding path program 1 times [2022-11-21 16:18:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:28,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138005768] [2022-11-21 16:18:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:29,358 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 16:18:29,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138005768] [2022-11-21 16:18:29,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138005768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:29,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:29,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:18:29,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189570278] [2022-11-21 16:18:29,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:18:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:18:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:18:29,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 265 [2022-11-21 16:18:29,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 225 transitions, 458 flow. Second operand has 5 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 16:18:29,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:29,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 265 [2022-11-21 16:18:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:29,654 INFO L130 PetriNetUnfolder]: 134/552 cut-off events. [2022-11-21 16:18:29,655 INFO L131 PetriNetUnfolder]: For 31/32 co-relation queries the response was YES. [2022-11-21 16:18:29,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 552 events. 134/552 cut-off events. For 31/32 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1694 event pairs, 14 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 775. Up to 133 conditions per place. [2022-11-21 16:18:29,665 INFO L137 encePairwiseOnDemand]: 259/265 looper letters, 50 selfloop transitions, 3 changer transitions 4/237 dead transitions. [2022-11-21 16:18:29,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 237 transitions, 601 flow [2022-11-21 16:18:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:18:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:18:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2022-11-21 16:18:29,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7833962264150943 [2022-11-21 16:18:29,670 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2022-11-21 16:18:29,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2022-11-21 16:18:29,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:29,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2022-11-21 16:18:29,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 16:18:29,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 16:18:29,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 16:18:29,680 INFO L175 Difference]: Start difference. First operand has 232 places, 225 transitions, 458 flow. Second operand 5 states and 1038 transitions. [2022-11-21 16:18:29,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 237 transitions, 601 flow [2022-11-21 16:18:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 237 transitions, 601 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:18:29,692 INFO L231 Difference]: Finished difference. Result has 231 places, 227 transitions, 481 flow [2022-11-21 16:18:29,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=231, PETRI_TRANSITIONS=227} [2022-11-21 16:18:29,694 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, -8 predicate places. [2022-11-21 16:18:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 227 transitions, 481 flow [2022-11-21 16:18:29,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 16:18:29,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:29,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:18:29,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 143055603, now seen corresponding path program 1 times [2022-11-21 16:18:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825687898] [2022-11-21 16:18:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:29,991 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 16:18:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825687898] [2022-11-21 16:18:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825687898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:29,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:29,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:18:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981867519] [2022-11-21 16:18:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:29,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:18:29,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:18:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:18:29,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 265 [2022-11-21 16:18:30,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 227 transitions, 481 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 16:18:30,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:30,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 265 [2022-11-21 16:18:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:30,236 INFO L130 PetriNetUnfolder]: 208/757 cut-off events. [2022-11-21 16:18:30,236 INFO L131 PetriNetUnfolder]: For 138/140 co-relation queries the response was YES. [2022-11-21 16:18:30,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 757 events. 208/757 cut-off events. For 138/140 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2963 event pairs, 36 based on Foata normal form. 13/694 useless extension candidates. Maximal degree in co-relation 1181. Up to 207 conditions per place. [2022-11-21 16:18:30,243 INFO L137 encePairwiseOnDemand]: 262/265 looper letters, 30 selfloop transitions, 2 changer transitions 0/239 dead transitions. [2022-11-21 16:18:30,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 239 transitions, 581 flow [2022-11-21 16:18:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:18:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:18:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-11-21 16:18:30,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.909433962264151 [2022-11-21 16:18:30,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-11-21 16:18:30,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-11-21 16:18:30,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:30,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-11-21 16:18:30,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 16:18:30,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 16:18:30,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 16:18:30,253 INFO L175 Difference]: Start difference. First operand has 231 places, 227 transitions, 481 flow. Second operand 3 states and 723 transitions. [2022-11-21 16:18:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 239 transitions, 581 flow [2022-11-21 16:18:30,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 239 transitions, 573 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 16:18:30,260 INFO L231 Difference]: Finished difference. Result has 229 places, 228 transitions, 488 flow [2022-11-21 16:18:30,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=488, PETRI_PLACES=229, PETRI_TRANSITIONS=228} [2022-11-21 16:18:30,261 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, -10 predicate places. [2022-11-21 16:18:30,262 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 488 flow [2022-11-21 16:18:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 16:18:30,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:30,263 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:30,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:18:30,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -732017315, now seen corresponding path program 1 times [2022-11-21 16:18:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348692442] [2022-11-21 16:18:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:30,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:30,492 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 16:18:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348692442] [2022-11-21 16:18:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348692442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:30,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:18:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002849447] [2022-11-21 16:18:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:18:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:18:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:18:30,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 265 [2022-11-21 16:18:30,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 228 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 16:18:30,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:30,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 265 [2022-11-21 16:18:30,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:30,691 INFO L130 PetriNetUnfolder]: 153/696 cut-off events. [2022-11-21 16:18:30,691 INFO L131 PetriNetUnfolder]: For 212/215 co-relation queries the response was YES. [2022-11-21 16:18:30,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 696 events. 153/696 cut-off events. For 212/215 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2807 event pairs, 27 based on Foata normal form. 12/635 useless extension candidates. Maximal degree in co-relation 1086. Up to 171 conditions per place. [2022-11-21 16:18:30,697 INFO L137 encePairwiseOnDemand]: 262/265 looper letters, 31 selfloop transitions, 2 changer transitions 0/240 dead transitions. [2022-11-21 16:18:30,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 240 transitions, 597 flow [2022-11-21 16:18:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:18:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:18:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-11-21 16:18:30,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9081761006289308 [2022-11-21 16:18:30,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-11-21 16:18:30,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-11-21 16:18:30,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:30,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-11-21 16:18:30,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 16:18:30,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 16:18:30,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 16:18:30,711 INFO L175 Difference]: Start difference. First operand has 229 places, 228 transitions, 488 flow. Second operand 3 states and 722 transitions. [2022-11-21 16:18:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 240 transitions, 597 flow [2022-11-21 16:18:30,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 240 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:18:30,722 INFO L231 Difference]: Finished difference. Result has 231 places, 229 transitions, 500 flow [2022-11-21 16:18:30,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=500, PETRI_PLACES=231, PETRI_TRANSITIONS=229} [2022-11-21 16:18:30,725 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, -8 predicate places. [2022-11-21 16:18:30,725 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 229 transitions, 500 flow [2022-11-21 16:18:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 16:18:30,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:30,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:18:30,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1061679038, now seen corresponding path program 1 times [2022-11-21 16:18:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:30,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284341354] [2022-11-21 16:18:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:30,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:31,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:31,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284341354] [2022-11-21 16:18:31,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284341354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:31,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:31,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:18:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303409600] [2022-11-21 16:18:31,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:31,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:18:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:18:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:18:31,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 265 [2022-11-21 16:18:31,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 229 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 16:18:31,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:31,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 265 [2022-11-21 16:18:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:31,427 INFO L130 PetriNetUnfolder]: 109/773 cut-off events. [2022-11-21 16:18:31,427 INFO L131 PetriNetUnfolder]: For 229/230 co-relation queries the response was YES. [2022-11-21 16:18:31,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 773 events. 109/773 cut-off events. For 229/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2936 event pairs, 36 based on Foata normal form. 8/712 useless extension candidates. Maximal degree in co-relation 1224. Up to 167 conditions per place. [2022-11-21 16:18:31,433 INFO L137 encePairwiseOnDemand]: 255/265 looper letters, 84 selfloop transitions, 11 changer transitions 0/270 dead transitions. [2022-11-21 16:18:31,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 270 transitions, 793 flow [2022-11-21 16:18:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:18:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:18:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1881 transitions. [2022-11-21 16:18:31,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7886792452830189 [2022-11-21 16:18:31,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1881 transitions. [2022-11-21 16:18:31,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1881 transitions. [2022-11-21 16:18:31,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:31,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1881 transitions. [2022-11-21 16:18:31,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 209.0) internal successors, (1881), 9 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 16:18:31,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:31,452 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:31,452 INFO L175 Difference]: Start difference. First operand has 231 places, 229 transitions, 500 flow. Second operand 9 states and 1881 transitions. [2022-11-21 16:18:31,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 270 transitions, 793 flow [2022-11-21 16:18:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 270 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:18:31,460 INFO L231 Difference]: Finished difference. Result has 240 places, 233 transitions, 540 flow [2022-11-21 16:18:31,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=240, PETRI_TRANSITIONS=233} [2022-11-21 16:18:31,463 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 1 predicate places. [2022-11-21 16:18:31,463 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 233 transitions, 540 flow [2022-11-21 16:18:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 16:18:31,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:31,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:18:31,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -613905674, now seen corresponding path program 1 times [2022-11-21 16:18:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:31,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964764666] [2022-11-21 16:18:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:18:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:31,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964764666] [2022-11-21 16:18:31,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964764666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:18:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348711785] [2022-11-21 16:18:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:18:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:18:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:18:31,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 265 [2022-11-21 16:18:31,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 233 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 16:18:31,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:31,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 265 [2022-11-21 16:18:31,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:32,124 INFO L130 PetriNetUnfolder]: 127/1067 cut-off events. [2022-11-21 16:18:32,124 INFO L131 PetriNetUnfolder]: For 321/323 co-relation queries the response was YES. [2022-11-21 16:18:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1067 events. 127/1067 cut-off events. For 321/323 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5015 event pairs, 42 based on Foata normal form. 15/997 useless extension candidates. Maximal degree in co-relation 1650. Up to 219 conditions per place. [2022-11-21 16:18:32,132 INFO L137 encePairwiseOnDemand]: 255/265 looper letters, 75 selfloop transitions, 12 changer transitions 0/262 dead transitions. [2022-11-21 16:18:32,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 262 transitions, 794 flow [2022-11-21 16:18:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:18:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:18:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1869 transitions. [2022-11-21 16:18:32,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7836477987421384 [2022-11-21 16:18:32,137 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1869 transitions. [2022-11-21 16:18:32,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1869 transitions. [2022-11-21 16:18:32,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:32,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1869 transitions. [2022-11-21 16:18:32,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.66666666666666) internal successors, (1869), 9 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states 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 16:18:32,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:32,148 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:32,149 INFO L175 Difference]: Start difference. First operand has 240 places, 233 transitions, 540 flow. Second operand 9 states and 1869 transitions. [2022-11-21 16:18:32,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 262 transitions, 794 flow [2022-11-21 16:18:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 262 transitions, 785 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:18:32,155 INFO L231 Difference]: Finished difference. Result has 247 places, 237 transitions, 575 flow [2022-11-21 16:18:32,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=575, PETRI_PLACES=247, PETRI_TRANSITIONS=237} [2022-11-21 16:18:32,157 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 8 predicate places. [2022-11-21 16:18:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 237 transitions, 575 flow [2022-11-21 16:18:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 16:18:32,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:32,158 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:18:32,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1769428669, now seen corresponding path program 1 times [2022-11-21 16:18:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:32,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98333705] [2022-11-21 16:18:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98333705] [2022-11-21 16:18:32,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98333705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:32,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:32,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:18:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779118668] [2022-11-21 16:18:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:32,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:18:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:18:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:18:32,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 265 [2022-11-21 16:18:32,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 237 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 193.25) internal successors, (1546), 8 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 16:18:32,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:32,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 265 [2022-11-21 16:18:32,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:35,196 INFO L130 PetriNetUnfolder]: 3272/9314 cut-off events. [2022-11-21 16:18:35,196 INFO L131 PetriNetUnfolder]: For 2799/2802 co-relation queries the response was YES. [2022-11-21 16:18:35,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16569 conditions, 9314 events. 3272/9314 cut-off events. For 2799/2802 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 87835 event pairs, 1597 based on Foata normal form. 0/7843 useless extension candidates. Maximal degree in co-relation 16558. Up to 1850 conditions per place. [2022-11-21 16:18:35,278 INFO L137 encePairwiseOnDemand]: 254/265 looper letters, 117 selfloop transitions, 11 changer transitions 0/291 dead transitions. [2022-11-21 16:18:35,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 291 transitions, 998 flow [2022-11-21 16:18:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:18:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:18:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1795 transitions. [2022-11-21 16:18:35,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7526205450733753 [2022-11-21 16:18:35,283 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1795 transitions. [2022-11-21 16:18:35,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1795 transitions. [2022-11-21 16:18:35,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1795 transitions. [2022-11-21 16:18:35,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.44444444444446) internal successors, (1795), 9 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states 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 16:18:35,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:35,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:35,294 INFO L175 Difference]: Start difference. First operand has 247 places, 237 transitions, 575 flow. Second operand 9 states and 1795 transitions. [2022-11-21 16:18:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 291 transitions, 998 flow [2022-11-21 16:18:35,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 291 transitions, 987 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:18:35,308 INFO L231 Difference]: Finished difference. Result has 255 places, 240 transitions, 606 flow [2022-11-21 16:18:35,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=606, PETRI_PLACES=255, PETRI_TRANSITIONS=240} [2022-11-21 16:18:35,309 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 16 predicate places. [2022-11-21 16:18:35,309 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 240 transitions, 606 flow [2022-11-21 16:18:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.25) internal successors, (1546), 8 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 16:18:35,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:35,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:18:35,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1731707687, now seen corresponding path program 1 times [2022-11-21 16:18:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451419024] [2022-11-21 16:18:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:36,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451419024] [2022-11-21 16:18:36,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451419024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:36,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:36,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:18:36,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403461996] [2022-11-21 16:18:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:18:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:18:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:18:36,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 265 [2022-11-21 16:18:36,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 240 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 193.25) internal successors, (1546), 8 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 16:18:36,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:36,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 265 [2022-11-21 16:18:36,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:38,103 INFO L130 PetriNetUnfolder]: 2420/7206 cut-off events. [2022-11-21 16:18:38,103 INFO L131 PetriNetUnfolder]: For 2888/2926 co-relation queries the response was YES. [2022-11-21 16:18:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13425 conditions, 7206 events. 2420/7206 cut-off events. For 2888/2926 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 63223 event pairs, 1207 based on Foata normal form. 0/6226 useless extension candidates. Maximal degree in co-relation 13411. Up to 1609 conditions per place. [2022-11-21 16:18:38,268 INFO L137 encePairwiseOnDemand]: 254/265 looper letters, 87 selfloop transitions, 9 changer transitions 21/280 dead transitions. [2022-11-21 16:18:38,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 280 transitions, 960 flow [2022-11-21 16:18:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:18:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:18:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1788 transitions. [2022-11-21 16:18:38,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7496855345911949 [2022-11-21 16:18:38,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1788 transitions. [2022-11-21 16:18:38,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1788 transitions. [2022-11-21 16:18:38,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:38,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1788 transitions. [2022-11-21 16:18:38,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.66666666666666) internal successors, (1788), 9 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states 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 16:18:38,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:38,284 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:38,285 INFO L175 Difference]: Start difference. First operand has 255 places, 240 transitions, 606 flow. Second operand 9 states and 1788 transitions. [2022-11-21 16:18:38,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 280 transitions, 960 flow [2022-11-21 16:18:38,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 280 transitions, 944 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:18:38,294 INFO L231 Difference]: Finished difference. Result has 260 places, 238 transitions, 602 flow [2022-11-21 16:18:38,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=602, PETRI_PLACES=260, PETRI_TRANSITIONS=238} [2022-11-21 16:18:38,296 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 21 predicate places. [2022-11-21 16:18:38,296 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 238 transitions, 602 flow [2022-11-21 16:18:38,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.25) internal successors, (1546), 8 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 16:18:38,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:38,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:38,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:18:38,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 250686035, now seen corresponding path program 1 times [2022-11-21 16:18:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651195032] [2022-11-21 16:18:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:18:38,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:38,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651195032] [2022-11-21 16:18:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651195032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:38,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:38,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:18:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427947791] [2022-11-21 16:18:38,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:18:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:18:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:18:38,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 265 [2022-11-21 16:18:38,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 238 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 16:18:38,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:38,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 265 [2022-11-21 16:18:38,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:40,296 INFO L130 PetriNetUnfolder]: 1714/4472 cut-off events. [2022-11-21 16:18:40,296 INFO L131 PetriNetUnfolder]: For 2209/2225 co-relation queries the response was YES. [2022-11-21 16:18:40,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 4472 events. 1714/4472 cut-off events. For 2209/2225 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 31832 event pairs, 517 based on Foata normal form. 114/4190 useless extension candidates. Maximal degree in co-relation 9152. Up to 1609 conditions per place. [2022-11-21 16:18:40,333 INFO L137 encePairwiseOnDemand]: 257/265 looper letters, 90 selfloop transitions, 8 changer transitions 3/264 dead transitions. [2022-11-21 16:18:40,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 264 transitions, 896 flow [2022-11-21 16:18:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:18:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:18:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1582 transitions. [2022-11-21 16:18:40,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7462264150943396 [2022-11-21 16:18:40,338 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1582 transitions. [2022-11-21 16:18:40,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1582 transitions. [2022-11-21 16:18:40,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:40,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1582 transitions. [2022-11-21 16:18:40,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.75) internal successors, (1582), 8 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states 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 16:18:40,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 16:18:40,348 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 16:18:40,348 INFO L175 Difference]: Start difference. First operand has 260 places, 238 transitions, 602 flow. Second operand 8 states and 1582 transitions. [2022-11-21 16:18:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 264 transitions, 896 flow [2022-11-21 16:18:40,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 264 transitions, 866 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-11-21 16:18:40,359 INFO L231 Difference]: Finished difference. Result has 255 places, 236 transitions, 591 flow [2022-11-21 16:18:40,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=591, PETRI_PLACES=255, PETRI_TRANSITIONS=236} [2022-11-21 16:18:40,360 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 16 predicate places. [2022-11-21 16:18:40,360 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 236 transitions, 591 flow [2022-11-21 16:18:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 16:18:40,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:40,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:18:40,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1090633725, now seen corresponding path program 1 times [2022-11-21 16:18:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255626702] [2022-11-21 16:18:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255626702] [2022-11-21 16:18:40,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255626702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:40,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999154544] [2022-11-21 16:18:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:40,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:40,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:18:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:18:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:42,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999154544] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:43,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:18:43,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 11] total 26 [2022-11-21 16:18:43,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340256233] [2022-11-21 16:18:43,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:18:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:18:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:18:43,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 265 [2022-11-21 16:18:43,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 236 transitions, 591 flow. Second operand has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states 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 16:18:43,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:43,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 265 [2022-11-21 16:18:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:45,272 INFO L130 PetriNetUnfolder]: 3519/6521 cut-off events. [2022-11-21 16:18:45,272 INFO L131 PetriNetUnfolder]: For 3524/3530 co-relation queries the response was YES. [2022-11-21 16:18:45,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14664 conditions, 6521 events. 3519/6521 cut-off events. For 3524/3530 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 44152 event pairs, 208 based on Foata normal form. 2/5956 useless extension candidates. Maximal degree in co-relation 14650. Up to 1280 conditions per place. [2022-11-21 16:18:45,331 INFO L137 encePairwiseOnDemand]: 248/265 looper letters, 154 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-11-21 16:18:45,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 344 transitions, 1322 flow [2022-11-21 16:18:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:18:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-21 16:18:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3293 transitions. [2022-11-21 16:18:45,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7309655937846837 [2022-11-21 16:18:45,340 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3293 transitions. [2022-11-21 16:18:45,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3293 transitions. [2022-11-21 16:18:45,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:45,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3293 transitions. [2022-11-21 16:18:45,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 193.7058823529412) internal successors, (3293), 17 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states 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 16:18:45,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states 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 16:18:45,362 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states 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 16:18:45,362 INFO L175 Difference]: Start difference. First operand has 255 places, 236 transitions, 591 flow. Second operand 17 states and 3293 transitions. [2022-11-21 16:18:45,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 344 transitions, 1322 flow [2022-11-21 16:18:45,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 344 transitions, 1281 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-11-21 16:18:45,372 INFO L231 Difference]: Finished difference. Result has 269 places, 252 transitions, 730 flow [2022-11-21 16:18:45,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=730, PETRI_PLACES=269, PETRI_TRANSITIONS=252} [2022-11-21 16:18:45,374 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 30 predicate places. [2022-11-21 16:18:45,375 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 252 transitions, 730 flow [2022-11-21 16:18:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states 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 16:18:45,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:45,376 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:45,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:18:45,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1226304625, now seen corresponding path program 2 times [2022-11-21 16:18:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840336854] [2022-11-21 16:18:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:18:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840336854] [2022-11-21 16:18:46,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840336854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:46,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:46,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:18:46,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002451582] [2022-11-21 16:18:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:46,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:18:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:18:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:18:46,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 265 [2022-11-21 16:18:46,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 252 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 189.33333333333334) internal successors, (1704), 9 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 16:18:46,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:46,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 265 [2022-11-21 16:18:46,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:47,992 INFO L130 PetriNetUnfolder]: 2909/5964 cut-off events. [2022-11-21 16:18:47,992 INFO L131 PetriNetUnfolder]: For 6930/7028 co-relation queries the response was YES. [2022-11-21 16:18:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15335 conditions, 5964 events. 2909/5964 cut-off events. For 6930/7028 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 41810 event pairs, 591 based on Foata normal form. 33/5548 useless extension candidates. Maximal degree in co-relation 15314. Up to 1823 conditions per place. [2022-11-21 16:18:48,058 INFO L137 encePairwiseOnDemand]: 256/265 looper letters, 114 selfloop transitions, 13 changer transitions 7/302 dead transitions. [2022-11-21 16:18:48,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 302 transitions, 1221 flow [2022-11-21 16:18:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:18:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:18:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1755 transitions. [2022-11-21 16:18:48,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7358490566037735 [2022-11-21 16:18:48,063 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1755 transitions. [2022-11-21 16:18:48,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1755 transitions. [2022-11-21 16:18:48,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:48,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1755 transitions. [2022-11-21 16:18:48,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 16:18:48,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:48,075 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:18:48,075 INFO L175 Difference]: Start difference. First operand has 269 places, 252 transitions, 730 flow. Second operand 9 states and 1755 transitions. [2022-11-21 16:18:48,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 302 transitions, 1221 flow [2022-11-21 16:18:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 302 transitions, 1190 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-21 16:18:48,097 INFO L231 Difference]: Finished difference. Result has 273 places, 254 transitions, 767 flow [2022-11-21 16:18:48,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=273, PETRI_TRANSITIONS=254} [2022-11-21 16:18:48,098 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 34 predicate places. [2022-11-21 16:18:48,099 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 254 transitions, 767 flow [2022-11-21 16:18:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.33333333333334) internal successors, (1704), 9 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 16:18:48,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:48,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:48,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:18:48,100 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 285094827, now seen corresponding path program 1 times [2022-11-21 16:18:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047540104] [2022-11-21 16:18:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:18:48,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047540104] [2022-11-21 16:18:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047540104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097770667] [2022-11-21 16:18:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:48,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:48,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:48,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:18:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:18:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:18:49,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:18:49,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097770667] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:49,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:18:49,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 6] total 11 [2022-11-21 16:18:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62599073] [2022-11-21 16:18:49,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:49,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:18:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:18:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:18:49,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 265 [2022-11-21 16:18:49,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 254 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 224.57142857142858) internal successors, (1572), 7 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 16:18:49,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:49,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 265 [2022-11-21 16:18:49,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:51,375 INFO L130 PetriNetUnfolder]: 2785/6508 cut-off events. [2022-11-21 16:18:51,375 INFO L131 PetriNetUnfolder]: For 7179/7521 co-relation queries the response was YES. [2022-11-21 16:18:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16311 conditions, 6508 events. 2785/6508 cut-off events. For 7179/7521 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 55385 event pairs, 311 based on Foata normal form. 118/6107 useless extension candidates. Maximal degree in co-relation 16286. Up to 1480 conditions per place. [2022-11-21 16:18:51,459 INFO L137 encePairwiseOnDemand]: 254/265 looper letters, 66 selfloop transitions, 25 changer transitions 0/305 dead transitions. [2022-11-21 16:18:51,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 305 transitions, 1178 flow [2022-11-21 16:18:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:18:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:18:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1615 transitions. [2022-11-21 16:18:51,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8706199460916442 [2022-11-21 16:18:51,464 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1615 transitions. [2022-11-21 16:18:51,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1615 transitions. [2022-11-21 16:18:51,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:51,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1615 transitions. [2022-11-21 16:18:51,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 230.71428571428572) internal successors, (1615), 7 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 16:18:51,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 16:18:51,475 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 16:18:51,475 INFO L175 Difference]: Start difference. First operand has 273 places, 254 transitions, 767 flow. Second operand 7 states and 1615 transitions. [2022-11-21 16:18:51,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 305 transitions, 1178 flow [2022-11-21 16:18:51,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 305 transitions, 1136 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-21 16:18:51,494 INFO L231 Difference]: Finished difference. Result has 272 places, 266 transitions, 910 flow [2022-11-21 16:18:51,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=272, PETRI_TRANSITIONS=266} [2022-11-21 16:18:51,496 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 33 predicate places. [2022-11-21 16:18:51,496 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 266 transitions, 910 flow [2022-11-21 16:18:51,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.57142857142858) internal successors, (1572), 7 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 16:18:51,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:51,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:51,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:51,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:18:51,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash -229458093, now seen corresponding path program 1 times [2022-11-21 16:18:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:51,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721088264] [2022-11-21 16:18:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:18:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721088264] [2022-11-21 16:18:52,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721088264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:52,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366338009] [2022-11-21 16:18:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:52,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:52,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:52,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:18:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:18:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:18:52,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:18:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366338009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:52,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:18:52,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2022-11-21 16:18:52,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598164378] [2022-11-21 16:18:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:52,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:18:52,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:18:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:18:52,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 265 [2022-11-21 16:18:52,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 266 transitions, 910 flow. Second operand has 6 states, 6 states have (on average 225.16666666666666) internal successors, (1351), 6 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states 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 16:18:52,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:52,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 265 [2022-11-21 16:18:52,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:56,011 INFO L130 PetriNetUnfolder]: 7404/16063 cut-off events. [2022-11-21 16:18:56,011 INFO L131 PetriNetUnfolder]: For 35993/37224 co-relation queries the response was YES. [2022-11-21 16:18:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48700 conditions, 16063 events. 7404/16063 cut-off events. For 35993/37224 co-relation queries the response was YES. Maximal size of possible extension queue 1158. Compared 157958 event pairs, 1025 based on Foata normal form. 160/14963 useless extension candidates. Maximal degree in co-relation 48673. Up to 2878 conditions per place. [2022-11-21 16:18:56,232 INFO L137 encePairwiseOnDemand]: 256/265 looper letters, 146 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2022-11-21 16:18:56,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 405 transitions, 2312 flow [2022-11-21 16:18:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:18:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:18:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1867 transitions. [2022-11-21 16:18:56,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8806603773584906 [2022-11-21 16:18:56,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1867 transitions. [2022-11-21 16:18:56,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1867 transitions. [2022-11-21 16:18:56,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:56,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1867 transitions. [2022-11-21 16:18:56,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 233.375) internal successors, (1867), 8 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 16:18:56,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 16:18:56,250 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 16:18:56,250 INFO L175 Difference]: Start difference. First operand has 272 places, 266 transitions, 910 flow. Second operand 8 states and 1867 transitions. [2022-11-21 16:18:56,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 405 transitions, 2312 flow [2022-11-21 16:18:56,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 405 transitions, 2284 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-21 16:18:56,361 INFO L231 Difference]: Finished difference. Result has 282 places, 308 transitions, 1469 flow [2022-11-21 16:18:56,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=282, PETRI_TRANSITIONS=308} [2022-11-21 16:18:56,363 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 43 predicate places. [2022-11-21 16:18:56,363 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 308 transitions, 1469 flow [2022-11-21 16:18:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.16666666666666) internal successors, (1351), 6 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states 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 16:18:56,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:56,364 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:56,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:56,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:18:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1848165785, now seen corresponding path program 2 times [2022-11-21 16:18:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237287889] [2022-11-21 16:18:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:18:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237287889] [2022-11-21 16:18:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237287889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:57,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:18:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336723654] [2022-11-21 16:18:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:18:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:18:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:18:57,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 265 [2022-11-21 16:18:57,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 308 transitions, 1469 flow. Second operand has 9 states, 9 states have (on average 190.0) internal successors, (1710), 9 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 16:18:57,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:57,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 265 [2022-11-21 16:18:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:19:02,879 INFO L130 PetriNetUnfolder]: 11816/22535 cut-off events. [2022-11-21 16:19:02,879 INFO L131 PetriNetUnfolder]: For 104739/105731 co-relation queries the response was YES. [2022-11-21 16:19:03,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89497 conditions, 22535 events. 11816/22535 cut-off events. For 104739/105731 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 204411 event pairs, 3327 based on Foata normal form. 610/22403 useless extension candidates. Maximal degree in co-relation 89465. Up to 12013 conditions per place. [2022-11-21 16:19:03,169 INFO L137 encePairwiseOnDemand]: 256/265 looper letters, 224 selfloop transitions, 11 changer transitions 0/405 dead transitions. [2022-11-21 16:19:03,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 405 transitions, 2951 flow [2022-11-21 16:19:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:19:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:19:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1751 transitions. [2022-11-21 16:19:03,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7341719077568134 [2022-11-21 16:19:03,178 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1751 transitions. [2022-11-21 16:19:03,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1751 transitions. [2022-11-21 16:19:03,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:19:03,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1751 transitions. [2022-11-21 16:19:03,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.55555555555554) internal successors, (1751), 9 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states 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 16:19:03,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:19:03,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 265.0) internal successors, (2650), 10 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 16:19:03,190 INFO L175 Difference]: Start difference. First operand has 282 places, 308 transitions, 1469 flow. Second operand 9 states and 1751 transitions. [2022-11-21 16:19:03,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 405 transitions, 2951 flow [2022-11-21 16:19:03,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 405 transitions, 2948 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-21 16:19:03,578 INFO L231 Difference]: Finished difference. Result has 291 places, 312 transitions, 1533 flow [2022-11-21 16:19:03,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1533, PETRI_PLACES=291, PETRI_TRANSITIONS=312} [2022-11-21 16:19:03,579 INFO L288 CegarLoopForPetriNet]: 239 programPoint places, 52 predicate places. [2022-11-21 16:19:03,579 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 312 transitions, 1533 flow [2022-11-21 16:19:03,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 190.0) internal successors, (1710), 9 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 16:19:03,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:19:03,581 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:03,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:19:03,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:19:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 15342248, now seen corresponding path program 1 times [2022-11-21 16:19:03,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:03,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483256531] [2022-11-21 16:19:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:03,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483256531] [2022-11-21 16:19:15,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483256531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722832624] [2022-11-21 16:19:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:15,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:15,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482aa4be-6024-4af1-9347-4b537d7409d9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:19:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:15,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-21 16:19:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:16,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:16,146 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:19:16,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 16:19:16,298 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:19:16,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-21 16:19:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:18,736 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-11-21 16:19:18,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2022-11-21 16:19:19,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 16:19:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:23,257 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-21 16:19:23,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-11-21 16:19:24,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 16:19:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:29,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:19:29,408 INFO L321 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-11-21 16:19:29,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 48 [2022-11-21 16:19:30,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:33,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:34,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:34,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:35,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:19:38,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:19:38,055 INFO L321 Elim1Store]: treesize reduction 41, result has 22.6 percent of original size [2022-11-21 16:19:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 25 [2022-11-21 16:19:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:38,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:41,933 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q1_back~0)) (not (< c_~q2_front~0 c_~n2~0)) (not (< c_~q2_back~0 c_~n2~0)) (not (< c_~q1_back~0 c_~n1~0)) (not (<= 0 c_~q2_front~0)) (not (<= 0 c_~q1_front~0)) (not (< c_~q1_front~0 c_~n1~0)) (not (<= 0 c_~q2_back~0)) (let ((.cse1 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse3 (+ c_~f~0.offset (* c_~i~0 4))) (.cse7 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse8 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse4 (+ c_~f~0.offset (* c_~j~0 4))) (.cse6 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (forall ((v_ArrVal_492 (Array Int Int)) (v_ArrVal_494 (Array Int Int)) (v_ArrVal_493 (Array Int Int)) (~f~0.base Int)) (let ((.cse9 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_493) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_494))) (let ((.cse2 (select .cse9 ~f~0.base)) (.cse0 (select .cse9 c_~q1~0.base)) (.cse5 (select .cse9 c_~q2~0.base))) (or (not (= (select .cse0 .cse1) (select .cse2 .cse3))) (not (= (+ (select .cse2 .cse4) (select .cse5 .cse6)) 0)) (<= (+ (select .cse0 .cse7) (select .cse5 .cse8) c_~total~0) 0))))) (forall ((v_ArrVal_492 (Array Int Int)) (v_ArrVal_494 (Array Int Int)) (v_ArrVal_493 (Array Int Int)) (~f~0.base Int)) (let ((.cse13 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_493) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_494))) (let ((.cse10 (select .cse13 c_~q1~0.base)) (.cse11 (select .cse13 ~f~0.base)) (.cse12 (select .cse13 c_~q2~0.base))) (or (not (= (select .cse10 .cse1) (select .cse11 .cse3))) (< 0 (+ (select .cse10 .cse7) (select .cse12 .cse8) c_~total~0 1)) (not (= (+ (select .cse11 .cse4) (select .cse12 .cse6)) 0))))))))) is different from false [2022-11-21 16:21:58,735 INFO L321 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2022-11-21 16:21:58,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 340 treesize of output 182 [2022-11-21 16:21:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:21:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:21:59,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:59,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 104554492 treesize of output 102641883 [2022-11-21 16:26:57,636 WARN L233 SmtUtils]: Spent 4.96m on a formula simplification that was a NOOP. DAG size: 5782 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-21 16:26:58,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:26:58,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102641634 treesize of output 101310514 [2022-11-21 16:32:05,338 WARN L233 SmtUtils]: Spent 5.12m on a formula simplification that was a NOOP. DAG size: 5797 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-21 16:32:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:32:06,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:32:06,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 101310434 treesize of output 90529894