./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.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_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/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_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/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_9b3729a1-6be5-4773-ae17-f21238c39e09/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 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 --- 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 10:53:17,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:53:17,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:53:17,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:53:17,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:53:17,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:53:17,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:53:17,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:53:17,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:53:17,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:53:17,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:53:17,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:53:17,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:53:17,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:53:17,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:53:17,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:53:17,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:53:17,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:53:17,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:53:17,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:53:17,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:53:17,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:53:17,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:53:17,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:53:17,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:53:17,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:53:17,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:53:17,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:53:17,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:53:17,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:53:17,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:53:17,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:53:17,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:53:17,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:53:17,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:53:17,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:53:17,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:53:17,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:53:17,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:53:17,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:53:17,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:53:17,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:53:18,035 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:53:18,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:53:18,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:53:18,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:53:18,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:53:18,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:53:18,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:53:18,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:53:18,040 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:53:18,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:53:18,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:53:18,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:53:18,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:53:18,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:53:18,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:53:18,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:53:18,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:53:18,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:53:18,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:53:18,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:53:18,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:53:18,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:53:18,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:53:18,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:53:18,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:18,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:53:18,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:53:18,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:53:18,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:53:18,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:53:18,047 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:53:18,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:53:18,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:53:18,048 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_9b3729a1-6be5-4773-ae17-f21238c39e09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 [2022-11-20 10:53:18,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:53:18,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:53:18,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:53:18,441 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:53:18,441 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:53:18,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-20 10:53:22,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:53:22,619 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:53:22,620 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-20 10:53:22,648 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/data/2e6b7d60c/74efae7b11ce49a39e6aaefe0f231448/FLAGa5c6a954f [2022-11-20 10:53:22,675 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/data/2e6b7d60c/74efae7b11ce49a39e6aaefe0f231448 [2022-11-20 10:53:22,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:53:22,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:53:22,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:22,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:53:22,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:53:22,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42832dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22, skipping insertion in model container [2022-11-20 10:53:22,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:53:22,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:53:23,232 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_9b3729a1-6be5-4773-ae17-f21238c39e09/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-20 10:53:23,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:23,269 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:53:23,355 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_9b3729a1-6be5-4773-ae17-f21238c39e09/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-20 10:53:23,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:23,422 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:53:23,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23 WrapperNode [2022-11-20 10:53:23,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:23,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:23,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:53:23,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:53:23,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,522 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-20 10:53:23,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:23,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:53:23,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:53:23,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:53:23,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,572 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:53:23,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:53:23,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:53:23,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:53:23,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (1/1) ... [2022-11-20 10:53:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:23,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:53:23,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b3729a1-6be5-4773-ae17-f21238c39e09/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:53:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:53:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 10:53:23,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 10:53:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:53:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:53:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:53:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:53:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:53:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:53:23,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:53:23,690 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 10:53:23,857 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:53:23,860 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:53:24,234 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:53:24,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:53:24,277 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:53:24,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:24 BoogieIcfgContainer [2022-11-20 10:53:24,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:53:24,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:53:24,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:53:24,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:53:24,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:53:22" (1/3) ... [2022-11-20 10:53:24,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601ae70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:24, skipping insertion in model container [2022-11-20 10:53:24,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:23" (2/3) ... [2022-11-20 10:53:24,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601ae70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:24, skipping insertion in model container [2022-11-20 10:53:24,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:24" (3/3) ... [2022-11-20 10:53:24,290 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2022-11-20 10:53:24,300 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:53:24,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:53:24,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:53:24,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:53:24,409 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:53:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 85 transitions, 175 flow [2022-11-20 10:53:24,502 INFO L130 PetriNetUnfolder]: 9/96 cut-off events. [2022-11-20 10:53:24,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:53:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 9/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-11-20 10:53:24,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 85 transitions, 175 flow [2022-11-20 10:53:24,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 85 transitions, 175 flow [2022-11-20 10:53:24,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:24,534 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;@792f9b20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:24,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:53:24,572 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2022-11-20 10:53:24,572 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:53:24,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:24,574 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] [2022-11-20 10:53:24,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1595637654, now seen corresponding path program 1 times [2022-11-20 10:53:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:24,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507848182] [2022-11-20 10:53:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:24,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:53:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:24,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:53:24,882 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:53:24,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-20 10:53:24,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-20 10:53:24,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-20 10:53:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:53:24,887 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 10:53:24,891 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:53:24,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 10:53:24,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:53:24,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 133 transitions, 278 flow [2022-11-20 10:53:24,991 INFO L130 PetriNetUnfolder]: 17/157 cut-off events. [2022-11-20 10:53:24,992 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:53:24,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 17/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-20 10:53:24,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 133 transitions, 278 flow [2022-11-20 10:53:24,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 133 transitions, 278 flow [2022-11-20 10:53:24,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:25,005 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;@792f9b20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:25,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:53:25,048 INFO L130 PetriNetUnfolder]: 4/84 cut-off events. [2022-11-20 10:53:25,048 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:53:25,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:25,049 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 10:53:25,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 10:53:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1914301512, now seen corresponding path program 1 times [2022-11-20 10:53:25,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:25,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846810224] [2022-11-20 10:53:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:25,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:53:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:25,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:53:25,180 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:53:25,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 10:53:25,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 10:53:25,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 10:53:25,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 10:53:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:53:25,182 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 10:53:25,183 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:53:25,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 10:53:25,234 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:53:25,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 181 transitions, 383 flow [2022-11-20 10:53:25,297 INFO L130 PetriNetUnfolder]: 25/218 cut-off events. [2022-11-20 10:53:25,297 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:53:25,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 25/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 523 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2022-11-20 10:53:25,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 181 transitions, 383 flow [2022-11-20 10:53:25,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 181 transitions, 383 flow [2022-11-20 10:53:25,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:25,308 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;@792f9b20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:25,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 10:53:25,341 INFO L130 PetriNetUnfolder]: 8/126 cut-off events. [2022-11-20 10:53:25,341 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:53:25,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:25,341 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-20 10:53:25,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 10:53:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1234620963, now seen corresponding path program 1 times [2022-11-20 10:53:25,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971344001] [2022-11-20 10:53:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:25,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:25,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:53:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:25,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:53:25,412 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:53:25,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 10:53:25,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 10:53:25,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 10:53:25,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 10:53:25,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 10:53:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:53:25,414 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 10:53:25,414 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:53:25,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 10:53:25,463 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:53:25,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 229 transitions, 490 flow [2022-11-20 10:53:25,520 INFO L130 PetriNetUnfolder]: 33/279 cut-off events. [2022-11-20 10:53:25,521 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 10:53:25,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 279 events. 33/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 795 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2022-11-20 10:53:25,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 229 transitions, 490 flow [2022-11-20 10:53:25,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 229 transitions, 490 flow [2022-11-20 10:53:25,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:25,533 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;@792f9b20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:25,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 10:53:25,557 INFO L130 PetriNetUnfolder]: 12/149 cut-off events. [2022-11-20 10:53:25,557 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 10:53:25,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:25,558 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] [2022-11-20 10:53:25,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 10:53:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1009700196, now seen corresponding path program 1 times [2022-11-20 10:53:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:25,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232631676] [2022-11-20 10:53:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:25,695 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 10:53:25,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:25,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232631676] [2022-11-20 10:53:25,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232631676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:25,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:25,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:25,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786221600] [2022-11-20 10:53:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:25,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:53:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:53:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:53:25,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 229 [2022-11-20 10:53:25,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 229 transitions, 490 flow. Second operand has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 10:53:25,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:25,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 229 [2022-11-20 10:53:25,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:26,392 INFO L130 PetriNetUnfolder]: 364/2258 cut-off events. [2022-11-20 10:53:26,394 INFO L131 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-11-20 10:53:26,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2878 conditions, 2258 events. 364/2258 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 18213 event pairs, 204 based on Foata normal form. 517/2518 useless extension candidates. Maximal degree in co-relation 884. Up to 325 conditions per place. [2022-11-20 10:53:26,439 INFO L137 encePairwiseOnDemand]: 215/229 looper letters, 12 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-11-20 10:53:26,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 206 transitions, 468 flow [2022-11-20 10:53:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:53:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:53:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 424 transitions. [2022-11-20 10:53:26,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.925764192139738 [2022-11-20 10:53:26,463 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 424 transitions. [2022-11-20 10:53:26,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 424 transitions. [2022-11-20 10:53:26,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:26,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 424 transitions. [2022-11-20 10:53:26,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 10:53:26,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states 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 10:53:26,486 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states 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 10:53:26,488 INFO L175 Difference]: Start difference. First operand has 209 places, 229 transitions, 490 flow. Second operand 2 states and 424 transitions. [2022-11-20 10:53:26,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 206 transitions, 468 flow [2022-11-20 10:53:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 206 transitions, 456 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:26,505 INFO L231 Difference]: Finished difference. Result has 200 places, 206 transitions, 432 flow [2022-11-20 10:53:26,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=432, PETRI_PLACES=200, PETRI_TRANSITIONS=206} [2022-11-20 10:53:26,514 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -9 predicate places. [2022-11-20 10:53:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 206 transitions, 432 flow [2022-11-20 10:53:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 10:53:26,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:26,516 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] [2022-11-20 10:53:26,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:53:26,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 10:53:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash -981071045, now seen corresponding path program 1 times [2022-11-20 10:53:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:26,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186071166] [2022-11-20 10:53:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:26,645 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 10:53:26,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186071166] [2022-11-20 10:53:26,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186071166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:26,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:26,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:26,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584479905] [2022-11-20 10:53:26,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:26,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:26,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 229 [2022-11-20 10:53:26,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 206 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 10:53:26,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:26,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 229 [2022-11-20 10:53:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:28,271 INFO L130 PetriNetUnfolder]: 1600/5568 cut-off events. [2022-11-20 10:53:28,272 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2022-11-20 10:53:28,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8026 conditions, 5568 events. 1600/5568 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 53347 event pairs, 852 based on Foata normal form. 0/4767 useless extension candidates. Maximal degree in co-relation 8019. Up to 1333 conditions per place. [2022-11-20 10:53:28,473 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 32 selfloop transitions, 2 changer transitions 0/219 dead transitions. [2022-11-20 10:53:28,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 219 transitions, 541 flow [2022-11-20 10:53:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-11-20 10:53:28,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8806404657933042 [2022-11-20 10:53:28,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-11-20 10:53:28,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-11-20 10:53:28,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:28,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-11-20 10:53:28,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 10:53:28,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 10:53:28,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 10:53:28,484 INFO L175 Difference]: Start difference. First operand has 200 places, 206 transitions, 432 flow. Second operand 3 states and 605 transitions. [2022-11-20 10:53:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 219 transitions, 541 flow [2022-11-20 10:53:28,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 219 transitions, 541 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:28,497 INFO L231 Difference]: Finished difference. Result has 203 places, 207 transitions, 444 flow [2022-11-20 10:53:28,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=203, PETRI_TRANSITIONS=207} [2022-11-20 10:53:28,502 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-11-20 10:53:28,503 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 207 transitions, 444 flow [2022-11-20 10:53:28,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 10:53:28,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:28,505 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] [2022-11-20 10:53:28,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:53:28,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 10:53:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 568658758, now seen corresponding path program 1 times [2022-11-20 10:53:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:28,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882548368] [2022-11-20 10:53:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:28,614 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 10:53:28,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882548368] [2022-11-20 10:53:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882548368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:28,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:28,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546452940] [2022-11-20 10:53:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:28,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 229 [2022-11-20 10:53:28,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 207 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 10:53:28,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:28,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 229 [2022-11-20 10:53:28,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:30,158 INFO L130 PetriNetUnfolder]: 1855/6197 cut-off events. [2022-11-20 10:53:30,158 INFO L131 PetriNetUnfolder]: For 725/725 co-relation queries the response was YES. [2022-11-20 10:53:30,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9408 conditions, 6197 events. 1855/6197 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 59904 event pairs, 609 based on Foata normal form. 0/5423 useless extension candidates. Maximal degree in co-relation 9399. Up to 1330 conditions per place. [2022-11-20 10:53:30,295 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 32 selfloop transitions, 3 changer transitions 0/216 dead transitions. [2022-11-20 10:53:30,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 216 transitions, 547 flow [2022-11-20 10:53:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-20 10:53:30,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8602620087336245 [2022-11-20 10:53:30,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-20 10:53:30,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-20 10:53:30,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:30,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-20 10:53:30,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 10:53:30,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 10:53:30,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 10:53:30,304 INFO L175 Difference]: Start difference. First operand has 203 places, 207 transitions, 444 flow. Second operand 3 states and 591 transitions. [2022-11-20 10:53:30,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 216 transitions, 547 flow [2022-11-20 10:53:30,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 216 transitions, 545 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:53:30,311 INFO L231 Difference]: Finished difference. Result has 205 places, 207 transitions, 453 flow [2022-11-20 10:53:30,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=453, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2022-11-20 10:53:30,315 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -4 predicate places. [2022-11-20 10:53:30,316 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 453 flow [2022-11-20 10:53:30,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 10:53:30,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:30,317 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 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 10:53:30,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:53:30,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 10:53:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2130882885, now seen corresponding path program 1 times [2022-11-20 10:53:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:30,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968847188] [2022-11-20 10:53:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:30,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:30,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:53:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:53:30,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:53:30,409 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:53:30,410 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 10:53:30,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 10:53:30,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 10:53:30,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 10:53:30,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 10:53:30,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 10:53:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:53:30,413 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 10:53:30,414 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:53:30,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 10:53:30,505 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:53:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 277 transitions, 599 flow [2022-11-20 10:53:30,647 INFO L130 PetriNetUnfolder]: 41/340 cut-off events. [2022-11-20 10:53:30,648 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 10:53:30,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 340 events. 41/340 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1057 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2022-11-20 10:53:30,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 277 transitions, 599 flow [2022-11-20 10:53:30,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 277 transitions, 599 flow [2022-11-20 10:53:30,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:30,664 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;@792f9b20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:30,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 10:53:30,681 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-11-20 10:53:30,681 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 10:53:30,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:30,682 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] [2022-11-20 10:53:30,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash -635192437, now seen corresponding path program 1 times [2022-11-20 10:53:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842926441] [2022-11-20 10:53:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:30,736 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 10:53:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:30,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842926441] [2022-11-20 10:53:30,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842926441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:30,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:30,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:30,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098141082] [2022-11-20 10:53:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:30,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:53:30,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:53:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:53:30,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 277 [2022-11-20 10:53:30,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 277 transitions, 599 flow. Second operand has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 10:53:30,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:30,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 277 [2022-11-20 10:53:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:32,720 INFO L130 PetriNetUnfolder]: 1336/7010 cut-off events. [2022-11-20 10:53:32,721 INFO L131 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-11-20 10:53:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9305 conditions, 7010 events. 1336/7010 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 72978 event pairs, 852 based on Foata normal form. 1912/8143 useless extension candidates. Maximal degree in co-relation 2918. Up to 1216 conditions per place. [2022-11-20 10:53:32,894 INFO L137 encePairwiseOnDemand]: 260/277 looper letters, 15 selfloop transitions, 0 changer transitions 0/250 dead transitions. [2022-11-20 10:53:32,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 250 transitions, 575 flow [2022-11-20 10:53:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:53:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:53:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 512 transitions. [2022-11-20 10:53:32,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.924187725631769 [2022-11-20 10:53:32,900 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 512 transitions. [2022-11-20 10:53:32,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 512 transitions. [2022-11-20 10:53:32,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:32,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 512 transitions. [2022-11-20 10:53:32,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 256.0) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 10:53:32,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 10:53:32,905 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states 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 10:53:32,906 INFO L175 Difference]: Start difference. First operand has 252 places, 277 transitions, 599 flow. Second operand 2 states and 512 transitions. [2022-11-20 10:53:32,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 250 transitions, 575 flow [2022-11-20 10:53:32,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 250 transitions, 555 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:32,914 INFO L231 Difference]: Finished difference. Result has 242 places, 250 transitions, 525 flow [2022-11-20 10:53:32,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=525, PETRI_PLACES=242, PETRI_TRANSITIONS=250} [2022-11-20 10:53:32,916 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -10 predicate places. [2022-11-20 10:53:32,916 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 250 transitions, 525 flow [2022-11-20 10:53:32,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 10:53:32,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:32,917 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] [2022-11-20 10:53:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:53:32,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash -606563286, now seen corresponding path program 1 times [2022-11-20 10:53:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786063369] [2022-11-20 10:53:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:33,018 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 10:53:33,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786063369] [2022-11-20 10:53:33,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786063369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:33,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:33,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146647049] [2022-11-20 10:53:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:33,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:33,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 277 [2022-11-20 10:53:33,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 250 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 10:53:33,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:33,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 277 [2022-11-20 10:53:33,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:39,100 INFO L130 PetriNetUnfolder]: 6265/20703 cut-off events. [2022-11-20 10:53:39,100 INFO L131 PetriNetUnfolder]: For 1801/1801 co-relation queries the response was YES. [2022-11-20 10:53:39,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29363 conditions, 20703 events. 6265/20703 cut-off events. For 1801/1801 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 245965 event pairs, 3444 based on Foata normal form. 0/17874 useless extension candidates. Maximal degree in co-relation 29355. Up to 4897 conditions per place. [2022-11-20 10:53:39,983 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 38 selfloop transitions, 2 changer transitions 0/266 dead transitions. [2022-11-20 10:53:39,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 266 transitions, 657 flow [2022-11-20 10:53:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-20 10:53:39,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8832731648616126 [2022-11-20 10:53:39,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-20 10:53:39,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-20 10:53:39,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:39,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-20 10:53:39,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 10:53:40,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:40,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:40,002 INFO L175 Difference]: Start difference. First operand has 242 places, 250 transitions, 525 flow. Second operand 3 states and 734 transitions. [2022-11-20 10:53:40,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 266 transitions, 657 flow [2022-11-20 10:53:40,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 266 transitions, 657 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:40,011 INFO L231 Difference]: Finished difference. Result has 245 places, 251 transitions, 537 flow [2022-11-20 10:53:40,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=245, PETRI_TRANSITIONS=251} [2022-11-20 10:53:40,015 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -7 predicate places. [2022-11-20 10:53:40,016 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 251 transitions, 537 flow [2022-11-20 10:53:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 10:53:40,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:40,017 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] [2022-11-20 10:53:40,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:53:40,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash -706502371, now seen corresponding path program 1 times [2022-11-20 10:53:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:40,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467633619] [2022-11-20 10:53:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:40,095 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 10:53:40,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467633619] [2022-11-20 10:53:40,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467633619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:40,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:40,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:40,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477166563] [2022-11-20 10:53:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:40,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:40,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 277 [2022-11-20 10:53:40,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 251 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 10:53:40,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:40,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 277 [2022-11-20 10:53:40,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:46,165 INFO L130 PetriNetUnfolder]: 7276/22799 cut-off events. [2022-11-20 10:53:46,165 INFO L131 PetriNetUnfolder]: For 2192/2192 co-relation queries the response was YES. [2022-11-20 10:53:46,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33940 conditions, 22799 events. 7276/22799 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 271461 event pairs, 2472 based on Foata normal form. 0/20093 useless extension candidates. Maximal degree in co-relation 33930. Up to 4813 conditions per place. [2022-11-20 10:53:46,836 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 38 selfloop transitions, 3 changer transitions 0/263 dead transitions. [2022-11-20 10:53:46,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 263 transitions, 663 flow [2022-11-20 10:53:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-11-20 10:53:46,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8664259927797834 [2022-11-20 10:53:46,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-11-20 10:53:46,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-11-20 10:53:46,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:46,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-11-20 10:53:46,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 10:53:46,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:46,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:46,848 INFO L175 Difference]: Start difference. First operand has 245 places, 251 transitions, 537 flow. Second operand 3 states and 720 transitions. [2022-11-20 10:53:46,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 263 transitions, 663 flow [2022-11-20 10:53:46,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 263 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:53:46,856 INFO L231 Difference]: Finished difference. Result has 247 places, 251 transitions, 546 flow [2022-11-20 10:53:46,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=247, PETRI_TRANSITIONS=251} [2022-11-20 10:53:46,859 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -5 predicate places. [2022-11-20 10:53:46,860 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 251 transitions, 546 flow [2022-11-20 10:53:46,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 10:53:46,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:46,861 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:46,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:53:46,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash 680781651, now seen corresponding path program 1 times [2022-11-20 10:53:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621563719] [2022-11-20 10:53:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:46,962 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 10:53:46,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621563719] [2022-11-20 10:53:46,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621563719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:46,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:46,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456098735] [2022-11-20 10:53:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:46,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 277 [2022-11-20 10:53:46,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 251 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 10:53:46,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:46,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 277 [2022-11-20 10:53:46,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:51,900 INFO L130 PetriNetUnfolder]: 6004/17909 cut-off events. [2022-11-20 10:53:51,900 INFO L131 PetriNetUnfolder]: For 1769/1769 co-relation queries the response was YES. [2022-11-20 10:53:52,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26492 conditions, 17909 events. 6004/17909 cut-off events. For 1769/1769 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 202790 event pairs, 3436 based on Foata normal form. 0/15492 useless extension candidates. Maximal degree in co-relation 26481. Up to 4880 conditions per place. [2022-11-20 10:53:52,252 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 37 selfloop transitions, 2 changer transitions 0/266 dead transitions. [2022-11-20 10:53:52,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 266 transitions, 669 flow [2022-11-20 10:53:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-11-20 10:53:52,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8820697954271961 [2022-11-20 10:53:52,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-11-20 10:53:52,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-11-20 10:53:52,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:52,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-11-20 10:53:52,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 10:53:52,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:52,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:52,260 INFO L175 Difference]: Start difference. First operand has 247 places, 251 transitions, 546 flow. Second operand 3 states and 733 transitions. [2022-11-20 10:53:52,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 266 transitions, 669 flow [2022-11-20 10:53:52,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 266 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:53:52,266 INFO L231 Difference]: Finished difference. Result has 249 places, 252 transitions, 555 flow [2022-11-20 10:53:52,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=249, PETRI_TRANSITIONS=252} [2022-11-20 10:53:52,267 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -3 predicate places. [2022-11-20 10:53:52,267 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 252 transitions, 555 flow [2022-11-20 10:53:52,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 10:53:52,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:52,268 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:53:52,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash 546484965, now seen corresponding path program 1 times [2022-11-20 10:53:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:52,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002169922] [2022-11-20 10:53:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:52,312 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 10:53:52,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002169922] [2022-11-20 10:53:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002169922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:52,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:52,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:52,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543005389] [2022-11-20 10:53:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:52,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:52,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 277 [2022-11-20 10:53:52,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 252 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 10:53:52,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:52,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 277 [2022-11-20 10:53:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:56,899 INFO L130 PetriNetUnfolder]: 7009/20036 cut-off events. [2022-11-20 10:53:56,900 INFO L131 PetriNetUnfolder]: For 2182/2182 co-relation queries the response was YES. [2022-11-20 10:53:57,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31112 conditions, 20036 events. 7009/20036 cut-off events. For 2182/2182 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 228184 event pairs, 2467 based on Foata normal form. 0/17702 useless extension candidates. Maximal degree in co-relation 31100. Up to 4790 conditions per place. [2022-11-20 10:53:57,446 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 37 selfloop transitions, 3 changer transitions 0/263 dead transitions. [2022-11-20 10:53:57,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 263 transitions, 672 flow [2022-11-20 10:53:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:53:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-11-20 10:53:57,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.865222623345367 [2022-11-20 10:53:57,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-11-20 10:53:57,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-11-20 10:53:57,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:57,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-11-20 10:53:57,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states 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 10:53:57,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:57,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 10:53:57,455 INFO L175 Difference]: Start difference. First operand has 249 places, 252 transitions, 555 flow. Second operand 3 states and 719 transitions. [2022-11-20 10:53:57,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 263 transitions, 672 flow [2022-11-20 10:53:57,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 263 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:53:57,464 INFO L231 Difference]: Finished difference. Result has 251 places, 252 transitions, 564 flow [2022-11-20 10:53:57,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=251, PETRI_TRANSITIONS=252} [2022-11-20 10:53:57,466 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -1 predicate places. [2022-11-20 10:53:57,466 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 252 transitions, 564 flow [2022-11-20 10:53:57,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 10:53:57,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:57,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:53:57,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 10:53:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1342180526, now seen corresponding path program 1 times [2022-11-20 10:53:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746613516] [2022-11-20 10:53:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:57,563 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 10:53:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:57,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746613516] [2022-11-20 10:53:57,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746613516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:57,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:57,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:53:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660617740] [2022-11-20 10:53:57,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:53:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:53:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:57,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 277 [2022-11-20 10:53:57,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 252 transitions, 564 flow. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 10:53:57,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:57,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 277 [2022-11-20 10:53:57,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand