./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:16:47,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:16:47,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:16:47,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:16:47,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:16:47,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:16:47,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:16:47,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:16:47,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:16:47,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:16:47,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:16:47,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:16:47,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:16:47,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:16:47,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:16:47,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:16:47,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:16:47,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:16:47,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:16:47,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:16:47,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:16:47,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:16:47,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:16:47,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:16:47,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:16:47,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:16:47,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:16:47,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:16:47,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:16:47,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:16:47,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:16:47,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:16:47,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:16:47,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:16:47,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:16:47,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:16:47,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:16:47,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:16:47,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:16:47,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:16:47,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:16:47,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:16:47,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:16:47,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:16:47,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:16:47,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:16:47,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:16:47,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:16:47,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:16:47,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:16:47,730 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:16:47,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:16:47,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:16:47,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:16:47,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:16:47,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:16:47,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:16:47,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:16:47,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:16:47,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:16:47,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:16:47,733 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:16:47,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:16:47,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:16:47,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:16:47,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:16:47,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:16:47,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:16:47,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:16:47,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:16:47,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:16:47,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:16:47,736 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:16:47,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:16:47,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:16:47,737 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_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2022-11-20 12:16:48,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:16:48,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:16:48,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:16:48,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:16:48,082 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:16:48,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-20 12:16:51,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:16:51,899 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:16:51,900 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-20 12:16:51,916 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/data/a934e66bf/6cb9757e56f743a2bcad6536c4cc5ef1/FLAGda6c6e7a5 [2022-11-20 12:16:51,942 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/data/a934e66bf/6cb9757e56f743a2bcad6536c4cc5ef1 [2022-11-20 12:16:51,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:16:51,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:16:51,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:16:51,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:16:51,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:16:51,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:16:51" (1/1) ... [2022-11-20 12:16:51,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b00dae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:51, skipping insertion in model container [2022-11-20 12:16:51,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:16:51" (1/1) ... [2022-11-20 12:16:51,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:16:52,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:16:52,634 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_a25ca848-2b90-4f76-90a3-e56c9edf5194/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-20 12:16:52,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:16:52,721 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:16:52,778 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_a25ca848-2b90-4f76-90a3-e56c9edf5194/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-20 12:16:52,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:16:52,872 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:16:52,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52 WrapperNode [2022-11-20 12:16:52,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:16:52,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:16:52,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:16:52,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:16:52,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,946 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-20 12:16:52,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:16:52,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:16:52,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:16:52,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:16:52,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:52,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:53,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:53,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:53,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:53,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:16:53,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:16:53,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:16:53,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:16:53,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (1/1) ... [2022-11-20 12:16:53,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:16:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:53,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:16:53,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:16:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:16:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:16:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:16:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:16:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:16:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:16:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 12:16:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 12:16:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:16:53,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:16:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:16:53,123 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:16:53,299 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:16:53,301 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:16:53,832 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:16:53,845 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:16:53,845 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-20 12:16:53,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:16:53 BoogieIcfgContainer [2022-11-20 12:16:53,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:16:53,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:16:53,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:16:53,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:16:53,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:16:51" (1/3) ... [2022-11-20 12:16:53,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633fc558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:16:53, skipping insertion in model container [2022-11-20 12:16:53,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:16:52" (2/3) ... [2022-11-20 12:16:53,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633fc558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:16:53, skipping insertion in model container [2022-11-20 12:16:53,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:16:53" (3/3) ... [2022-11-20 12:16:53,863 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2022-11-20 12:16:53,872 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:16:53,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:16:53,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-20 12:16:53,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:16:53,965 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 12:16:54,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-11-20 12:16:54,141 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-11-20 12:16:54,141 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:16:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1784 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-20 12:16:54,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-11-20 12:16:54,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-11-20 12:16:54,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:16:54,188 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;@1057db85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:16:54,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:16:54,216 INFO L130 PetriNetUnfolder]: 17/143 cut-off events. [2022-11-20 12:16:54,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:16:54,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:54,217 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:54,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1488741163, now seen corresponding path program 1 times [2022-11-20 12:16:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006681106] [2022-11-20 12:16:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:54,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:54,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006681106] [2022-11-20 12:16:54,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006681106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:54,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:54,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:16:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321789804] [2022-11-20 12:16:54,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:16:54,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:54,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:16:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:16:54,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 255 [2022-11-20 12:16:54,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 505 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:54,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:16:54,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 255 [2022-11-20 12:16:54,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:54,815 INFO L130 PetriNetUnfolder]: 9/321 cut-off events. [2022-11-20 12:16:54,815 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:16:54,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 321 events. 9/321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1413 event pairs, 0 based on Foata normal form. 63/366 useless extension candidates. Maximal degree in co-relation 177. Up to 4 conditions per place. [2022-11-20 12:16:54,821 INFO L137 encePairwiseOnDemand]: 217/255 looper letters, 1 selfloop transitions, 0 changer transitions 0/209 dead transitions. [2022-11-20 12:16:54,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 209 transitions, 425 flow [2022-11-20 12:16:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:16:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:16:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-20 12:16:54,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.907843137254902 [2022-11-20 12:16:54,847 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-20 12:16:54,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-20 12:16:54,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:54,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-20 12:16:54,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:54,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:54,872 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:54,874 INFO L175 Difference]: Start difference. First operand has 209 places, 250 transitions, 505 flow. Second operand 2 states and 463 transitions. [2022-11-20 12:16:54,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 209 transitions, 425 flow [2022-11-20 12:16:54,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 209 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:16:54,887 INFO L231 Difference]: Finished difference. Result has 207 places, 209 transitions, 423 flow [2022-11-20 12:16:54,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=423, PETRI_PLACES=207, PETRI_TRANSITIONS=209} [2022-11-20 12:16:54,896 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -2 predicate places. [2022-11-20 12:16:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 209 transitions, 423 flow [2022-11-20 12:16:54,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:54,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:54,898 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:16:54,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1961754262, now seen corresponding path program 1 times [2022-11-20 12:16:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207171217] [2022-11-20 12:16:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:54,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:55,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207171217] [2022-11-20 12:16:55,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207171217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:55,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:55,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:16:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997147609] [2022-11-20 12:16:55,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:16:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:16:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:55,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 255 [2022-11-20 12:16:55,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 209 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:16:55,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 255 [2022-11-20 12:16:55,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:55,268 INFO L130 PetriNetUnfolder]: 9/325 cut-off events. [2022-11-20 12:16:55,268 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:16:55,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 325 events. 9/325 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 340. Up to 9 conditions per place. [2022-11-20 12:16:55,281 INFO L137 encePairwiseOnDemand]: 252/255 looper letters, 10 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-20 12:16:55,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 213 transitions, 455 flow [2022-11-20 12:16:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:16:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2022-11-20 12:16:55,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8209150326797385 [2022-11-20 12:16:55,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2022-11-20 12:16:55,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2022-11-20 12:16:55,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:55,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2022-11-20 12:16:55,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,295 INFO L175 Difference]: Start difference. First operand has 207 places, 209 transitions, 423 flow. Second operand 3 states and 628 transitions. [2022-11-20 12:16:55,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 213 transitions, 455 flow [2022-11-20 12:16:55,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 213 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:16:55,305 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 435 flow [2022-11-20 12:16:55,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2022-11-20 12:16:55,307 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2022-11-20 12:16:55,307 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 435 flow [2022-11-20 12:16:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:55,310 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:55,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:16:55,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash -929438698, now seen corresponding path program 1 times [2022-11-20 12:16:55,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917713068] [2022-11-20 12:16:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:55,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:55,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917713068] [2022-11-20 12:16:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917713068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434772623] [2022-11-20 12:16:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:55,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:55,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:55,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:16:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:16:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:55,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434772623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:55,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:16:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203955060] [2022-11-20 12:16:55,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:16:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:16:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:16:55,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 12:16:55,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:55,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:16:55,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 12:16:55,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:56,036 INFO L130 PetriNetUnfolder]: 9/332 cut-off events. [2022-11-20 12:16:56,037 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:16:56,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 332 events. 9/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1405 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 361. Up to 6 conditions per place. [2022-11-20 12:16:56,041 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 11 selfloop transitions, 9 changer transitions 0/220 dead transitions. [2022-11-20 12:16:56,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 220 transitions, 497 flow [2022-11-20 12:16:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:16:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:16:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1858 transitions. [2022-11-20 12:16:56,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095860566448801 [2022-11-20 12:16:56,047 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1858 transitions. [2022-11-20 12:16:56,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1858 transitions. [2022-11-20 12:16:56,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:56,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1858 transitions. [2022-11-20 12:16:56,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:56,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:56,060 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:56,060 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 435 flow. Second operand 9 states and 1858 transitions. [2022-11-20 12:16:56,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 220 transitions, 497 flow [2022-11-20 12:16:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:16:56,066 INFO L231 Difference]: Finished difference. Result has 220 places, 216 transitions, 483 flow [2022-11-20 12:16:56,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=220, PETRI_TRANSITIONS=216} [2022-11-20 12:16:56,073 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 11 predicate places. [2022-11-20 12:16:56,073 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 216 transitions, 483 flow [2022-11-20 12:16:56,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:56,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:56,076 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:56,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:56,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:56,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1473481706, now seen corresponding path program 2 times [2022-11-20 12:16:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791906314] [2022-11-20 12:16:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791906314] [2022-11-20 12:16:56,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791906314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54062174] [2022-11-20 12:16:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:16:56,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:56,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:56,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:56,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:16:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:16:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:16:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:56,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:56,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54062174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:56,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:56,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:16:56,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217265383] [2022-11-20 12:16:56,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:16:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:16:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:16:56,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 12:16:56,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 216 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:56,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:16:56,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 12:16:56,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:57,325 INFO L130 PetriNetUnfolder]: 9/352 cut-off events. [2022-11-20 12:16:57,325 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-20 12:16:57,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 352 events. 9/352 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1404 event pairs, 0 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 448. Up to 11 conditions per place. [2022-11-20 12:16:57,329 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 19 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2022-11-20 12:16:57,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 671 flow [2022-11-20 12:16:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:16:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:16:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4328 transitions. [2022-11-20 12:16:57,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8082166199813259 [2022-11-20 12:16:57,341 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4328 transitions. [2022-11-20 12:16:57,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4328 transitions. [2022-11-20 12:16:57,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:57,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4328 transitions. [2022-11-20 12:16:57,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.0952380952381) internal successors, (4328), 21 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:57,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:57,374 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:57,374 INFO L175 Difference]: Start difference. First operand has 220 places, 216 transitions, 483 flow. Second operand 21 states and 4328 transitions. [2022-11-20 12:16:57,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 671 flow [2022-11-20 12:16:57,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 240 transitions, 657 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 12:16:57,384 INFO L231 Difference]: Finished difference. Result has 244 places, 229 transitions, 607 flow [2022-11-20 12:16:57,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=607, PETRI_PLACES=244, PETRI_TRANSITIONS=229} [2022-11-20 12:16:57,386 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 35 predicate places. [2022-11-20 12:16:57,387 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 229 transitions, 607 flow [2022-11-20 12:16:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:57,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:57,390 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:57,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 12:16:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:57,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash -898264042, now seen corresponding path program 3 times [2022-11-20 12:16:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243621291] [2022-11-20 12:16:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243621291] [2022-11-20 12:16:58,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243621291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673631617] [2022-11-20 12:16:58,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:16:58,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:58,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:16:58,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 12:16:58,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:16:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:16:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673631617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:58,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:58,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 12:16:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511361014] [2022-11-20 12:16:58,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:58,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:16:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:16:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:16:58,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 12:16:58,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 229 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:58,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:16:58,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 12:16:58,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:59,285 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-20 12:16:59,285 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 12:16:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 367 events. 9/367 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1402 event pairs, 0 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 544. Up to 17 conditions per place. [2022-11-20 12:16:59,289 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2022-11-20 12:16:59,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 255 transitions, 863 flow [2022-11-20 12:16:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:16:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 12:16:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6178 transitions. [2022-11-20 12:16:59,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8075816993464052 [2022-11-20 12:16:59,305 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6178 transitions. [2022-11-20 12:16:59,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6178 transitions. [2022-11-20 12:16:59,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:59,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6178 transitions. [2022-11-20 12:16:59,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.93333333333334) internal successors, (6178), 30 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,344 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,344 INFO L175 Difference]: Start difference. First operand has 244 places, 229 transitions, 607 flow. Second operand 30 states and 6178 transitions. [2022-11-20 12:16:59,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 255 transitions, 863 flow [2022-11-20 12:16:59,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 255 transitions, 833 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 12:16:59,354 INFO L231 Difference]: Finished difference. Result has 271 places, 239 transitions, 735 flow [2022-11-20 12:16:59,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=735, PETRI_PLACES=271, PETRI_TRANSITIONS=239} [2022-11-20 12:16:59,355 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 62 predicate places. [2022-11-20 12:16:59,355 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 239 transitions, 735 flow [2022-11-20 12:16:59,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:59,358 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:59,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 12:16:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1658269334, now seen corresponding path program 4 times [2022-11-20 12:16:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247603519] [2022-11-20 12:16:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:16:59,628 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:16:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:16:59,702 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:16:59,702 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:16:59,703 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 12:16:59,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 12:16:59,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 12:16:59,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 12:16:59,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 12:16:59,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:16:59,708 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-20 12:16:59,711 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:16:59,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 12:16:59,790 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:16:59,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-20 12:16:59,903 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-20 12:16:59,904 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 12:16:59,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3239 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-20 12:16:59,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-11-20 12:16:59,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-11-20 12:16:59,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:16:59,929 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;@1057db85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:16:59,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 12:16:59,945 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-20 12:16:59,945 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:16:59,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:16:59,946 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] [2022-11-20 12:16:59,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:16:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:59,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1114127539, now seen corresponding path program 1 times [2022-11-20 12:16:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:59,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350957030] [2022-11-20 12:16:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:59,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:00,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350957030] [2022-11-20 12:17:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350957030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:00,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:17:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:17:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064799643] [2022-11-20 12:17:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:00,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:17:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:17:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:17:00,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 328 [2022-11-20 12:17:00,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 328 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:00,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 328 [2022-11-20 12:17:00,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:00,122 INFO L130 PetriNetUnfolder]: 17/522 cut-off events. [2022-11-20 12:17:00,123 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 12:17:00,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 522 events. 17/522 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2735 event pairs, 0 based on Foata normal form. 126/619 useless extension candidates. Maximal degree in co-relation 330. Up to 7 conditions per place. [2022-11-20 12:17:00,131 INFO L137 encePairwiseOnDemand]: 278/328 looper letters, 4 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-20 12:17:00,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 574 flow [2022-11-20 12:17:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:17:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:17:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 594 transitions. [2022-11-20 12:17:00,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9054878048780488 [2022-11-20 12:17:00,135 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 594 transitions. [2022-11-20 12:17:00,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 594 transitions. [2022-11-20 12:17:00,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:00,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 594 transitions. [2022-11-20 12:17:00,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 297.0) internal successors, (594), 2 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,139 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,140 INFO L175 Difference]: Start difference. First operand has 273 places, 328 transitions, 674 flow. Second operand 2 states and 594 transitions. [2022-11-20 12:17:00,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 574 flow [2022-11-20 12:17:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 274 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:17:00,148 INFO L231 Difference]: Finished difference. Result has 270 places, 274 transitions, 566 flow [2022-11-20 12:17:00,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=566, PETRI_PLACES=270, PETRI_TRANSITIONS=274} [2022-11-20 12:17:00,151 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, -3 predicate places. [2022-11-20 12:17:00,152 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 274 transitions, 566 flow [2022-11-20 12:17:00,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:00,155 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:00,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:17:00,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1958084880, now seen corresponding path program 1 times [2022-11-20 12:17:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:00,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946278183] [2022-11-20 12:17:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:00,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946278183] [2022-11-20 12:17:00,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946278183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:00,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:17:00,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:17:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771891384] [2022-11-20 12:17:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:00,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:17:00,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-20 12:17:00,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 274 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:00,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-20 12:17:00,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:00,358 INFO L130 PetriNetUnfolder]: 17/526 cut-off events. [2022-11-20 12:17:00,358 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 12:17:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 526 events. 17/526 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2745 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 554. Up to 14 conditions per place. [2022-11-20 12:17:00,368 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-20 12:17:00,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 278 transitions, 604 flow [2022-11-20 12:17:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:17:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-20 12:17:00,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-20 12:17:00,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:00,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,379 INFO L175 Difference]: Start difference. First operand has 270 places, 274 transitions, 566 flow. Second operand 3 states and 805 transitions. [2022-11-20 12:17:00,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 278 transitions, 604 flow [2022-11-20 12:17:00,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 278 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:17:00,392 INFO L231 Difference]: Finished difference. Result has 273 places, 275 transitions, 578 flow [2022-11-20 12:17:00,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=273, PETRI_TRANSITIONS=275} [2022-11-20 12:17:00,396 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-20 12:17:00,396 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 275 transitions, 578 flow [2022-11-20 12:17:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:00,397 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] [2022-11-20 12:17:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:17:00,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1150478808, now seen corresponding path program 1 times [2022-11-20 12:17:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624137460] [2022-11-20 12:17:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:00,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:00,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624137460] [2022-11-20 12:17:00,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624137460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535448596] [2022-11-20 12:17:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:00,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:00,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:00,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:17:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:17:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:17:00,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:00,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535448596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:00,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:00,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:17:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221742324] [2022-11-20 12:17:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:00,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:00,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:17:00,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-20 12:17:00,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 275 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:00,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-20 12:17:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:00,847 INFO L130 PetriNetUnfolder]: 13/427 cut-off events. [2022-11-20 12:17:00,847 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 12:17:00,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 427 events. 13/427 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1983 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 463. Up to 16 conditions per place. [2022-11-20 12:17:00,857 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/279 dead transitions. [2022-11-20 12:17:00,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 279 transitions, 616 flow [2022-11-20 12:17:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:17:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-20 12:17:00,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-20 12:17:00,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:00,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-20 12:17:00,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,867 INFO L175 Difference]: Start difference. First operand has 273 places, 275 transitions, 578 flow. Second operand 3 states and 805 transitions. [2022-11-20 12:17:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 279 transitions, 616 flow [2022-11-20 12:17:00,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 279 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:00,874 INFO L231 Difference]: Finished difference. Result has 275 places, 276 transitions, 588 flow [2022-11-20 12:17:00,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=276} [2022-11-20 12:17:00,877 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-11-20 12:17:00,877 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 276 transitions, 588 flow [2022-11-20 12:17:00,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:00,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:00,878 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:00,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:01,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:17:01,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -930708873, now seen corresponding path program 1 times [2022-11-20 12:17:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858964038] [2022-11-20 12:17:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:01,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858964038] [2022-11-20 12:17:01,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858964038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:01,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266671380] [2022-11-20 12:17:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:01,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:01,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:17:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:17:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:01,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:01,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266671380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:17:01,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:17:01,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:17:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871857881] [2022-11-20 12:17:01,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:17:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:17:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:17:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:17:01,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 12:17:01,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 276 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:01,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:01,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 12:17:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:01,618 INFO L130 PetriNetUnfolder]: 13/434 cut-off events. [2022-11-20 12:17:01,618 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 12:17:01,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 434 events. 13/434 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 481. Up to 11 conditions per place. [2022-11-20 12:17:01,625 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 14 selfloop transitions, 9 changer transitions 0/286 dead transitions. [2022-11-20 12:17:01,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 286 transitions, 656 flow [2022-11-20 12:17:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:17:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:17:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2383 transitions. [2022-11-20 12:17:01,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8072493224932249 [2022-11-20 12:17:01,632 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2383 transitions. [2022-11-20 12:17:01,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2383 transitions. [2022-11-20 12:17:01,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:01,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2383 transitions. [2022-11-20 12:17:01,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.77777777777777) internal successors, (2383), 9 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:01,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:01,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:01,646 INFO L175 Difference]: Start difference. First operand has 275 places, 276 transitions, 588 flow. Second operand 9 states and 2383 transitions. [2022-11-20 12:17:01,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 286 transitions, 656 flow [2022-11-20 12:17:01,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 286 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:01,652 INFO L231 Difference]: Finished difference. Result has 285 places, 282 transitions, 636 flow [2022-11-20 12:17:01,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=285, PETRI_TRANSITIONS=282} [2022-11-20 12:17:01,653 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 12 predicate places. [2022-11-20 12:17:01,654 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 282 transitions, 636 flow [2022-11-20 12:17:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:01,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:01,655 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:01,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:01,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:17:01,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 951543159, now seen corresponding path program 2 times [2022-11-20 12:17:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837455425] [2022-11-20 12:17:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:01,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:02,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837455425] [2022-11-20 12:17:02,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837455425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180421749] [2022-11-20 12:17:02,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:17:02,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:02,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:02,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:17:02,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:17:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:17:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:17:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:02,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180421749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:17:02,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:17:02,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:17:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771718980] [2022-11-20 12:17:02,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:17:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:17:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:17:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:17:02,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 12:17:02,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 282 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:02,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 12:17:02,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:02,663 INFO L130 PetriNetUnfolder]: 13/454 cut-off events. [2022-11-20 12:17:02,663 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 12:17:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 454 events. 13/454 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1980 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 568. Up to 11 conditions per place. [2022-11-20 12:17:02,672 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 22 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2022-11-20 12:17:02,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 306 transitions, 830 flow [2022-11-20 12:17:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:17:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:17:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5549 transitions. [2022-11-20 12:17:02,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8056039488966318 [2022-11-20 12:17:02,725 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5549 transitions. [2022-11-20 12:17:02,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5549 transitions. [2022-11-20 12:17:02,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:02,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5549 transitions. [2022-11-20 12:17:02,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 264.23809523809524) internal successors, (5549), 21 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,757 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,757 INFO L175 Difference]: Start difference. First operand has 285 places, 282 transitions, 636 flow. Second operand 21 states and 5549 transitions. [2022-11-20 12:17:02,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 306 transitions, 830 flow [2022-11-20 12:17:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 306 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:02,766 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 760 flow [2022-11-20 12:17:02,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=760, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2022-11-20 12:17:02,768 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 36 predicate places. [2022-11-20 12:17:02,768 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 760 flow [2022-11-20 12:17:02,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:02,770 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:02,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:17:02,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash 290057079, now seen corresponding path program 3 times [2022-11-20 12:17:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:02,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577311818] [2022-11-20 12:17:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577311818] [2022-11-20 12:17:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577311818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488797746] [2022-11-20 12:17:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:17:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:03,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:03,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:17:03,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 12:17:03,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:17:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:17:03,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 12:17:03,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488797746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:17:03,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:17:03,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 12:17:03,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218783506] [2022-11-20 12:17:03,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:17:03,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:17:03,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:17:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:17:03,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 12:17:03,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 760 flow. Second operand has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:03,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:03,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 12:17:03,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:04,471 INFO L130 PetriNetUnfolder]: 13/469 cut-off events. [2022-11-20 12:17:04,471 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-20 12:17:04,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 469 events. 13/469 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 664. Up to 17 conditions per place. [2022-11-20 12:17:04,480 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 28 selfloop transitions, 30 changer transitions 0/321 dead transitions. [2022-11-20 12:17:04,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 321 transitions, 1022 flow [2022-11-20 12:17:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:17:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 12:17:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7921 transitions. [2022-11-20 12:17:04,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8049796747967479 [2022-11-20 12:17:04,493 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7921 transitions. [2022-11-20 12:17:04,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7921 transitions. [2022-11-20 12:17:04,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:04,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7921 transitions. [2022-11-20 12:17:04,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.03333333333336) internal successors, (7921), 30 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:04,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:04,533 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:04,533 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 760 flow. Second operand 30 states and 7921 transitions. [2022-11-20 12:17:04,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 321 transitions, 1022 flow [2022-11-20 12:17:04,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 321 transitions, 992 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 12:17:04,542 INFO L231 Difference]: Finished difference. Result has 336 places, 305 transitions, 888 flow [2022-11-20 12:17:04,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=888, PETRI_PLACES=336, PETRI_TRANSITIONS=305} [2022-11-20 12:17:04,554 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 63 predicate places. [2022-11-20 12:17:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 305 transitions, 888 flow [2022-11-20 12:17:04,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:04,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:04,558 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:04,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 12:17:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:04,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 12:17:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash 686461615, now seen corresponding path program 4 times [2022-11-20 12:17:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:04,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16713754] [2022-11-20 12:17:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:17:04,805 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:17:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:17:04,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:17:04,856 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:17:04,857 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 12:17:04,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 12:17:04,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 12:17:04,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 12:17:04,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 12:17:04,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 12:17:04,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:17:04,859 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-20 12:17:04,860 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:17:04,861 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 12:17:04,914 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:17:04,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-20 12:17:05,102 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-20 12:17:05,102 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 12:17:05,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4919 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-20 12:17:05,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-11-20 12:17:05,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-11-20 12:17:05,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:17:05,139 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;@1057db85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:17:05,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 12:17:05,153 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-20 12:17:05,153 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:17:05,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:05,154 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] [2022-11-20 12:17:05,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 490789389, now seen corresponding path program 1 times [2022-11-20 12:17:05,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:05,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538072499] [2022-11-20 12:17:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:05,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538072499] [2022-11-20 12:17:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538072499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:05,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:17:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:17:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84228106] [2022-11-20 12:17:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:17:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:17:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:17:05,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 401 [2022-11-20 12:17:05,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 832 flow. Second operand has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:05,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 401 [2022-11-20 12:17:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:05,383 INFO L130 PetriNetUnfolder]: 27/749 cut-off events. [2022-11-20 12:17:05,383 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 12:17:05,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 749 events. 27/749 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4225 event pairs, 1 based on Foata normal form. 256/963 useless extension candidates. Maximal degree in co-relation 536. Up to 16 conditions per place. [2022-11-20 12:17:05,395 INFO L137 encePairwiseOnDemand]: 339/401 looper letters, 6 selfloop transitions, 0 changer transitions 0/334 dead transitions. [2022-11-20 12:17:05,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 710 flow [2022-11-20 12:17:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:17:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:17:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-20 12:17:05,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9027431421446384 [2022-11-20 12:17:05,400 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-20 12:17:05,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-20 12:17:05,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:05,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-20 12:17:05,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,405 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,406 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 832 flow. Second operand 2 states and 724 transitions. [2022-11-20 12:17:05,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 710 flow [2022-11-20 12:17:05,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:17:05,414 INFO L231 Difference]: Finished difference. Result has 329 places, 334 transitions, 698 flow [2022-11-20 12:17:05,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=329, PETRI_TRANSITIONS=334} [2022-11-20 12:17:05,416 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -4 predicate places. [2022-11-20 12:17:05,416 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 334 transitions, 698 flow [2022-11-20 12:17:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:05,417 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] [2022-11-20 12:17:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:17:05,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -731965488, now seen corresponding path program 1 times [2022-11-20 12:17:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774806757] [2022-11-20 12:17:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:05,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774806757] [2022-11-20 12:17:05,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774806757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:05,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:17:05,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:17:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782217733] [2022-11-20 12:17:05,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:17:05,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-20 12:17:05,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 334 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:05,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-20 12:17:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:05,698 INFO L130 PetriNetUnfolder]: 27/753 cut-off events. [2022-11-20 12:17:05,698 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 12:17:05,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 753 events. 27/753 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4235 event pairs, 1 based on Foata normal form. 0/711 useless extension candidates. Maximal degree in co-relation 803. Up to 23 conditions per place. [2022-11-20 12:17:05,717 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/338 dead transitions. [2022-11-20 12:17:05,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 338 transitions, 740 flow [2022-11-20 12:17:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:17:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-20 12:17:05,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-20 12:17:05,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-20 12:17:05,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-20 12:17:05,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:05,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-20 12:17:05,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,728 INFO L175 Difference]: Start difference. First operand has 329 places, 334 transitions, 698 flow. Second operand 3 states and 981 transitions. [2022-11-20 12:17:05,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 338 transitions, 740 flow [2022-11-20 12:17:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 338 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:17:05,736 INFO L231 Difference]: Finished difference. Result has 332 places, 335 transitions, 710 flow [2022-11-20 12:17:05,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=332, PETRI_TRANSITIONS=335} [2022-11-20 12:17:05,738 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -1 predicate places. [2022-11-20 12:17:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 335 transitions, 710 flow [2022-11-20 12:17:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:05,739 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] [2022-11-20 12:17:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:17:05,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 798570601, now seen corresponding path program 1 times [2022-11-20 12:17:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:05,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195455367] [2022-11-20 12:17:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:05,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195455367] [2022-11-20 12:17:05,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195455367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022745062] [2022-11-20 12:17:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:05,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:05,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:05,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:05,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:17:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:17:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:17:05,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:05,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022745062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:05,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:05,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:17:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335125910] [2022-11-20 12:17:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:05,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:17:05,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-20 12:17:05,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 335 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:05,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:05,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-20 12:17:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:06,181 INFO L130 PetriNetUnfolder]: 23/654 cut-off events. [2022-11-20 12:17:06,182 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-20 12:17:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 654 events. 23/654 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3491 event pairs, 1 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 717. Up to 30 conditions per place. [2022-11-20 12:17:06,197 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/339 dead transitions. [2022-11-20 12:17:06,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 339 transitions, 752 flow [2022-11-20 12:17:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:17:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-20 12:17:06,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-20 12:17:06,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-20 12:17:06,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-20 12:17:06,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:06,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-20 12:17:06,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,209 INFO L175 Difference]: Start difference. First operand has 332 places, 335 transitions, 710 flow. Second operand 3 states and 981 transitions. [2022-11-20 12:17:06,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 339 transitions, 752 flow [2022-11-20 12:17:06,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 339 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:06,217 INFO L231 Difference]: Finished difference. Result has 334 places, 336 transitions, 720 flow [2022-11-20 12:17:06,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=334, PETRI_TRANSITIONS=336} [2022-11-20 12:17:06,219 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 1 predicate places. [2022-11-20 12:17:06,220 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 336 transitions, 720 flow [2022-11-20 12:17:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:06,221 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] [2022-11-20 12:17:06,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:17:06,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1599524314, now seen corresponding path program 1 times [2022-11-20 12:17:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:06,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858498220] [2022-11-20 12:17:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:17:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858498220] [2022-11-20 12:17:06,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858498220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492272002] [2022-11-20 12:17:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:06,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:06,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:06,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:17:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:17:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:17:06,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:06,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492272002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:06,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:06,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:17:06,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236375056] [2022-11-20 12:17:06,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:06,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:17:06,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:17:06,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:17:06,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-20 12:17:06,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 336 transitions, 720 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:06,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-20 12:17:06,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:06,938 INFO L130 PetriNetUnfolder]: 26/807 cut-off events. [2022-11-20 12:17:06,938 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 12:17:06,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 807 events. 26/807 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4009 event pairs, 1 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 890. Up to 36 conditions per place. [2022-11-20 12:17:06,955 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 16 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-11-20 12:17:06,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 340 transitions, 764 flow [2022-11-20 12:17:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:17:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2022-11-20 12:17:06,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8137988362427265 [2022-11-20 12:17:06,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2022-11-20 12:17:06,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2022-11-20 12:17:06,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:06,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2022-11-20 12:17:06,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,964 INFO L175 Difference]: Start difference. First operand has 334 places, 336 transitions, 720 flow. Second operand 3 states and 979 transitions. [2022-11-20 12:17:06,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 340 transitions, 764 flow [2022-11-20 12:17:06,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 340 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:06,971 INFO L231 Difference]: Finished difference. Result has 336 places, 337 transitions, 730 flow [2022-11-20 12:17:06,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=336, PETRI_TRANSITIONS=337} [2022-11-20 12:17:06,972 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 3 predicate places. [2022-11-20 12:17:06,972 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 337 transitions, 730 flow [2022-11-20 12:17:06,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:06,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:06,973 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] [2022-11-20 12:17:06,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:17:07,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1194190247, now seen corresponding path program 1 times [2022-11-20 12:17:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:07,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441925020] [2022-11-20 12:17:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441925020] [2022-11-20 12:17:07,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441925020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303708957] [2022-11-20 12:17:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:07,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:07,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:17:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:17:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303708957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:17:07,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:17:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:17:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39510343] [2022-11-20 12:17:07,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:17:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:17:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:17:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:17:07,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-20 12:17:07,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 337 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:07,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:07,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-20 12:17:07,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:17:07,780 INFO L130 PetriNetUnfolder]: 26/814 cut-off events. [2022-11-20 12:17:07,780 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-20 12:17:07,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 814 events. 26/814 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3982 event pairs, 1 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 899. Up to 20 conditions per place. [2022-11-20 12:17:07,802 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 16 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-11-20 12:17:07,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 347 transitions, 802 flow [2022-11-20 12:17:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:17:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:17:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2907 transitions. [2022-11-20 12:17:07,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-11-20 12:17:07,809 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2907 transitions. [2022-11-20 12:17:07,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2907 transitions. [2022-11-20 12:17:07,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:17:07,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2907 transitions. [2022-11-20 12:17:07,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.0) internal successors, (2907), 9 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:07,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:07,825 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:07,825 INFO L175 Difference]: Start difference. First operand has 336 places, 337 transitions, 730 flow. Second operand 9 states and 2907 transitions. [2022-11-20 12:17:07,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 347 transitions, 802 flow [2022-11-20 12:17:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 347 transitions, 800 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:17:07,832 INFO L231 Difference]: Finished difference. Result has 346 places, 343 transitions, 778 flow [2022-11-20 12:17:07,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=346, PETRI_TRANSITIONS=343} [2022-11-20 12:17:07,835 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 13 predicate places. [2022-11-20 12:17:07,835 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 343 transitions, 778 flow [2022-11-20 12:17:07,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:07,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:17:07,837 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:07,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:08,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:17:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1855352505, now seen corresponding path program 2 times [2022-11-20 12:17:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69017205] [2022-11-20 12:17:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:17:08,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69017205] [2022-11-20 12:17:08,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69017205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737296626] [2022-11-20 12:17:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:17:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:08,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a25ca848-2b90-4f76-90a3-e56c9edf5194/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:17:08,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:17:08,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:17:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:17:08,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:08,405 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 7 treesize of output 6 [2022-11-20 12:17:08,593 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:17:08,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:17:08,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 12:17:08,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:17:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:17:08,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:08,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737296626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:08,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:08,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-20 12:17:08,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831882506] [2022-11-20 12:17:08,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:08,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:17:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:17:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:17:08,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 401 [2022-11-20 12:17:08,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 343 transitions, 778 flow. Second operand has 12 states, 12 states have (on average 268.3333333333333) internal successors, (3220), 12 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:08,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:17:08,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 401 [2022-11-20 12:17:08,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand