./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:41:58,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:41:58,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:41:58,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:41:58,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:41:58,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:41:58,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:41:58,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:41:58,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:41:58,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:41:58,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:41:58,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:41:58,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:41:58,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:41:58,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:41:58,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:41:58,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:41:58,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:41:58,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:41:58,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:41:58,280 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:41:58,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:41:58,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:41:58,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:41:58,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:41:58,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:41:58,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:41:58,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:41:58,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:41:58,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:41:58,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:41:58,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:41:58,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:41:58,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:41:58,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:41:58,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:41:58,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:41:58,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:41:58,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:41:58,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:41:58,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:41:58,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:41:58,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:41:58,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:41:58,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:41:58,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:41:58,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:41:58,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:41:58,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:41:58,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:41:58,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:41:58,339 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:41:58,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:41:58,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:41:58,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:41:58,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:41:58,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:41:58,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:41:58,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:41:58,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:41:58,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:41:58,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:41:58,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:41:58,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:41:58,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:41:58,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:41:58,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:41:58,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:41:58,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:41:58,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:41:58,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:41:58,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:41:58,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:41:58,346 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:41:58,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:41:58,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:41:58,346 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 [2022-07-22 21:41:58,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:41:58,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:41:58,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:41:58,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:41:58,609 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:41:58,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-07-22 21:41:58,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58f18e75/3cb7d59135814407ac232b1fe23af832/FLAG48de8c081 [2022-07-22 21:41:59,088 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:41:59,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-07-22 21:41:59,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58f18e75/3cb7d59135814407ac232b1fe23af832/FLAG48de8c081 [2022-07-22 21:41:59,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58f18e75/3cb7d59135814407ac232b1fe23af832 [2022-07-22 21:41:59,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:41:59,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:41:59,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:41:59,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:41:59,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:41:59,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac1e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59, skipping insertion in model container [2022-07-22 21:41:59,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:41:59,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:41:59,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-07-22 21:41:59,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:41:59,694 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:41:59,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-07-22 21:41:59,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:41:59,749 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:41:59,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59 WrapperNode [2022-07-22 21:41:59,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:41:59,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:41:59,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:41:59,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:41:59,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,819 INFO L137 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 646 [2022-07-22 21:41:59,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:41:59,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:41:59,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:41:59,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:41:59,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:41:59,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:41:59,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:41:59,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:41:59,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (1/1) ... [2022-07-22 21:41:59,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:41:59,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:41:59,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:41:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:41:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:41:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:41:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:41:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:41:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:41:59,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:41:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:41:59,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:41:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:41:59,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:41:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:41:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:41:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:41:59,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:41:59,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:41:59,948 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:42:00,116 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:42:00,131 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:42:00,785 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:42:00,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:42:00,796 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:42:00,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:42:00 BoogieIcfgContainer [2022-07-22 21:42:00,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:42:00,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:42:00,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:42:00,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:42:00,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:41:59" (1/3) ... [2022-07-22 21:42:00,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736ae30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:42:00, skipping insertion in model container [2022-07-22 21:42:00,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:59" (2/3) ... [2022-07-22 21:42:00,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736ae30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:42:00, skipping insertion in model container [2022-07-22 21:42:00,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:42:00" (3/3) ... [2022-07-22 21:42:00,805 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-07-22 21:42:00,810 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:42:00,817 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:42:00,818 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:42:00,818 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:42:00,941 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:42:01,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 770 places, 851 transitions, 1726 flow [2022-07-22 21:42:01,346 INFO L129 PetriNetUnfolder]: 91/848 cut-off events. [2022-07-22 21:42:01,346 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:42:01,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 848 events. 91/848 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3067 event pairs, 0 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 622. Up to 2 conditions per place. [2022-07-22 21:42:01,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 770 places, 851 transitions, 1726 flow [2022-07-22 21:42:01,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 756 places, 837 transitions, 1692 flow [2022-07-22 21:42:01,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:42:01,418 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21c08c8e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e11cc7b [2022-07-22 21:42:01,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:42:01,674 INFO L129 PetriNetUnfolder]: 89/826 cut-off events. [2022-07-22 21:42:01,674 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:42:01,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:01,675 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:01,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1800599683, now seen corresponding path program 1 times [2022-07-22 21:42:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761654219] [2022-07-22 21:42:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:01,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761654219] [2022-07-22 21:42:01,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761654219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:01,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:42:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008010866] [2022-07-22 21:42:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:42:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:42:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:42:02,039 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 807 out of 851 [2022-07-22 21:42:02,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 837 transitions, 1692 flow. Second operand has 2 states, 2 states have (on average 811.0) internal successors, (1622), 2 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:02,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 807 of 851 [2022-07-22 21:42:02,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:02,391 INFO L129 PetriNetUnfolder]: 54/800 cut-off events. [2022-07-22 21:42:02,392 INFO L130 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2022-07-22 21:42:02,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 800 events. 54/800 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2979 event pairs, 0 based on Foata normal form. 60/775 useless extension candidates. Maximal degree in co-relation 597. Up to 7 conditions per place. [2022-07-22 21:42:02,419 INFO L132 encePairwiseOnDemand]: 814/851 looper letters, 6 selfloop transitions, 0 changer transitions 7/800 dead transitions. [2022-07-22 21:42:02,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 800 transitions, 1630 flow [2022-07-22 21:42:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:42:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:42:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1657 transitions. [2022-07-22 21:42:02,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9735605170387779 [2022-07-22 21:42:02,441 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1657 transitions. [2022-07-22 21:42:02,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1657 transitions. [2022-07-22 21:42:02,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:02,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1657 transitions. [2022-07-22 21:42:02,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 828.5) internal successors, (1657), 2 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 851.0) internal successors, (2553), 3 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,470 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 851.0) internal successors, (2553), 3 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,472 INFO L186 Difference]: Start difference. First operand has 756 places, 837 transitions, 1692 flow. Second operand 2 states and 1657 transitions. [2022-07-22 21:42:02,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 800 transitions, 1630 flow [2022-07-22 21:42:02,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 800 transitions, 1618 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:42:02,496 INFO L242 Difference]: Finished difference. Result has 751 places, 793 transitions, 1592 flow [2022-07-22 21:42:02,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1592, PETRI_PLACES=751, PETRI_TRANSITIONS=793} [2022-07-22 21:42:02,502 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -5 predicate places. [2022-07-22 21:42:02,502 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 793 transitions, 1592 flow [2022-07-22 21:42:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 811.0) internal successors, (1622), 2 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:02,504 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:42:02,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1922282005, now seen corresponding path program 1 times [2022-07-22 21:42:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:02,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907444628] [2022-07-22 21:42:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:02,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:02,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907444628] [2022-07-22 21:42:02,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907444628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:02,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:02,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:02,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308640423] [2022-07-22 21:42:02,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:02,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:02,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:02,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 793 transitions, 1592 flow. Second operand has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:02,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:02,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:02,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:04,005 INFO L129 PetriNetUnfolder]: 395/3750 cut-off events. [2022-07-22 21:42:04,006 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:42:04,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4069 conditions, 3750 events. 395/3750 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 33479 event pairs, 96 based on Foata normal form. 0/3311 useless extension candidates. Maximal degree in co-relation 4066. Up to 184 conditions per place. [2022-07-22 21:42:04,116 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 33 selfloop transitions, 2 changer transitions 0/808 dead transitions. [2022-07-22 21:42:04,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 808 transitions, 1697 flow [2022-07-22 21:42:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-22 21:42:04,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-22 21:42:04,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-22 21:42:04,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-22 21:42:04,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:04,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-22 21:42:04,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:04,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:04,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:04,135 INFO L186 Difference]: Start difference. First operand has 751 places, 793 transitions, 1592 flow. Second operand 3 states and 2416 transitions. [2022-07-22 21:42:04,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 808 transitions, 1697 flow [2022-07-22 21:42:04,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 808 transitions, 1697 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:42:04,150 INFO L242 Difference]: Finished difference. Result has 748 places, 795 transitions, 1612 flow [2022-07-22 21:42:04,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1612, PETRI_PLACES=748, PETRI_TRANSITIONS=795} [2022-07-22 21:42:04,152 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -8 predicate places. [2022-07-22 21:42:04,152 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 795 transitions, 1612 flow [2022-07-22 21:42:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:04,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:04,154 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:42:04,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 88216851, now seen corresponding path program 2 times [2022-07-22 21:42:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336622691] [2022-07-22 21:42:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336622691] [2022-07-22 21:42:04,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336622691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:04,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:04,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374645925] [2022-07-22 21:42:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:04,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:04,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 795 transitions, 1612 flow. Second operand has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:04,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:04,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:04,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:05,402 INFO L129 PetriNetUnfolder]: 387/3844 cut-off events. [2022-07-22 21:42:05,403 INFO L130 PetriNetUnfolder]: For 104/111 co-relation queries the response was YES. [2022-07-22 21:42:05,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 3844 events. 387/3844 cut-off events. For 104/111 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 34432 event pairs, 98 based on Foata normal form. 6/3459 useless extension candidates. Maximal degree in co-relation 4240. Up to 196 conditions per place. [2022-07-22 21:42:05,500 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 33 selfloop transitions, 4 changer transitions 0/810 dead transitions. [2022-07-22 21:42:05,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 810 transitions, 1725 flow [2022-07-22 21:42:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-22 21:42:05,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-22 21:42:05,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-22 21:42:05,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-22 21:42:05,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:05,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-22 21:42:05,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:05,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:05,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:05,519 INFO L186 Difference]: Start difference. First operand has 748 places, 795 transitions, 1612 flow. Second operand 3 states and 2416 transitions. [2022-07-22 21:42:05,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 810 transitions, 1725 flow [2022-07-22 21:42:05,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 810 transitions, 1723 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:05,533 INFO L242 Difference]: Finished difference. Result has 751 places, 797 transitions, 1642 flow [2022-07-22 21:42:05,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1642, PETRI_PLACES=751, PETRI_TRANSITIONS=797} [2022-07-22 21:42:05,535 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -5 predicate places. [2022-07-22 21:42:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 797 transitions, 1642 flow [2022-07-22 21:42:05,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.0) internal successors, (2391), 3 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:05,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:05,538 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:42:05,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1761177293, now seen corresponding path program 1 times [2022-07-22 21:42:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180490575] [2022-07-22 21:42:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:05,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180490575] [2022-07-22 21:42:05,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180490575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:05,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:05,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:05,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699021170] [2022-07-22 21:42:05,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:05,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:05,613 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:05,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 797 transitions, 1642 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:05,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:05,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:05,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:07,306 INFO L129 PetriNetUnfolder]: 789/6879 cut-off events. [2022-07-22 21:42:07,306 INFO L130 PetriNetUnfolder]: For 396/463 co-relation queries the response was YES. [2022-07-22 21:42:07,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 6879 events. 789/6879 cut-off events. For 396/463 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 71122 event pairs, 210 based on Foata normal form. 4/6060 useless extension candidates. Maximal degree in co-relation 7573. Up to 390 conditions per place. [2022-07-22 21:42:07,423 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 32 selfloop transitions, 5 changer transitions 0/812 dead transitions. [2022-07-22 21:42:07,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 812 transitions, 1757 flow [2022-07-22 21:42:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2415 transitions. [2022-07-22 21:42:07,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9459459459459459 [2022-07-22 21:42:07,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2415 transitions. [2022-07-22 21:42:07,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2415 transitions. [2022-07-22 21:42:07,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:07,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2415 transitions. [2022-07-22 21:42:07,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.0) internal successors, (2415), 3 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:07,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:07,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:07,447 INFO L186 Difference]: Start difference. First operand has 751 places, 797 transitions, 1642 flow. Second operand 3 states and 2415 transitions. [2022-07-22 21:42:07,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 812 transitions, 1757 flow [2022-07-22 21:42:07,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 812 transitions, 1745 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:42:07,463 INFO L242 Difference]: Finished difference. Result has 753 places, 800 transitions, 1675 flow [2022-07-22 21:42:07,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1675, PETRI_PLACES=753, PETRI_TRANSITIONS=800} [2022-07-22 21:42:07,467 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -3 predicate places. [2022-07-22 21:42:07,467 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 800 transitions, 1675 flow [2022-07-22 21:42:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:07,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:07,469 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:42:07,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1465338821, now seen corresponding path program 1 times [2022-07-22 21:42:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327313619] [2022-07-22 21:42:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:07,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327313619] [2022-07-22 21:42:07,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327313619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:07,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:07,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321569966] [2022-07-22 21:42:07,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:07,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:07,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 800 transitions, 1675 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:07,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:07,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:07,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:08,556 INFO L129 PetriNetUnfolder]: 292/3140 cut-off events. [2022-07-22 21:42:08,556 INFO L130 PetriNetUnfolder]: For 320/389 co-relation queries the response was YES. [2022-07-22 21:42:08,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3665 conditions, 3140 events. 292/3140 cut-off events. For 320/389 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28006 event pairs, 72 based on Foata normal form. 8/2876 useless extension candidates. Maximal degree in co-relation 3658. Up to 184 conditions per place. [2022-07-22 21:42:08,663 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 35 selfloop transitions, 4 changer transitions 0/816 dead transitions. [2022-07-22 21:42:08,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 816 transitions, 1800 flow [2022-07-22 21:42:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-22 21:42:08,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-22 21:42:08,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-22 21:42:08,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-22 21:42:08,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:08,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-22 21:42:08,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:08,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:08,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:08,681 INFO L186 Difference]: Start difference. First operand has 753 places, 800 transitions, 1675 flow. Second operand 3 states and 2416 transitions. [2022-07-22 21:42:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 816 transitions, 1800 flow [2022-07-22 21:42:08,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 816 transitions, 1788 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:42:08,695 INFO L242 Difference]: Finished difference. Result has 755 places, 803 transitions, 1707 flow [2022-07-22 21:42:08,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1707, PETRI_PLACES=755, PETRI_TRANSITIONS=803} [2022-07-22 21:42:08,697 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, -1 predicate places. [2022-07-22 21:42:08,697 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 803 transitions, 1707 flow [2022-07-22 21:42:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:08,699 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:08,699 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:08,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:42:08,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1042716161, now seen corresponding path program 2 times [2022-07-22 21:42:08,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223294490] [2022-07-22 21:42:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:08,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223294490] [2022-07-22 21:42:08,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223294490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:08,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:08,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348778694] [2022-07-22 21:42:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:08,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:08,765 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:08,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 803 transitions, 1707 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:08,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:08,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:08,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:09,522 INFO L129 PetriNetUnfolder]: 269/3037 cut-off events. [2022-07-22 21:42:09,523 INFO L130 PetriNetUnfolder]: For 592/650 co-relation queries the response was YES. [2022-07-22 21:42:09,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3646 conditions, 3037 events. 269/3037 cut-off events. For 592/650 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 26944 event pairs, 80 based on Foata normal form. 8/2792 useless extension candidates. Maximal degree in co-relation 3638. Up to 201 conditions per place. [2022-07-22 21:42:09,635 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 37 selfloop transitions, 5 changer transitions 0/818 dead transitions. [2022-07-22 21:42:09,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 818 transitions, 1837 flow [2022-07-22 21:42:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-22 21:42:09,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9463376419898158 [2022-07-22 21:42:09,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-22 21:42:09,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-22 21:42:09,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:09,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-22 21:42:09,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,653 INFO L186 Difference]: Start difference. First operand has 755 places, 803 transitions, 1707 flow. Second operand 3 states and 2416 transitions. [2022-07-22 21:42:09,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 818 transitions, 1837 flow [2022-07-22 21:42:09,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 818 transitions, 1833 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:09,669 INFO L242 Difference]: Finished difference. Result has 758 places, 805 transitions, 1752 flow [2022-07-22 21:42:09,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1752, PETRI_PLACES=758, PETRI_TRANSITIONS=805} [2022-07-22 21:42:09,672 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 2 predicate places. [2022-07-22 21:42:09,672 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 805 transitions, 1752 flow [2022-07-22 21:42:09,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,673 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:09,673 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:42:09,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1621645087, now seen corresponding path program 2 times [2022-07-22 21:42:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:09,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392240897] [2022-07-22 21:42:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:09,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392240897] [2022-07-22 21:42:09,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392240897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:09,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:09,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012440232] [2022-07-22 21:42:09,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:09,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:09,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 793 out of 851 [2022-07-22 21:42:09,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 805 transitions, 1752 flow. Second operand has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:09,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:09,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 793 of 851 [2022-07-22 21:42:09,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:11,237 INFO L129 PetriNetUnfolder]: 792/7438 cut-off events. [2022-07-22 21:42:11,237 INFO L130 PetriNetUnfolder]: For 835/927 co-relation queries the response was YES. [2022-07-22 21:42:11,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8401 conditions, 7438 events. 792/7438 cut-off events. For 835/927 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 78527 event pairs, 219 based on Foata normal form. 12/6646 useless extension candidates. Maximal degree in co-relation 8392. Up to 409 conditions per place. [2022-07-22 21:42:11,317 INFO L132 encePairwiseOnDemand]: 847/851 looper letters, 36 selfloop transitions, 4 changer transitions 0/817 dead transitions. [2022-07-22 21:42:11,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 817 transitions, 1864 flow [2022-07-22 21:42:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2415 transitions. [2022-07-22 21:42:11,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9459459459459459 [2022-07-22 21:42:11,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2415 transitions. [2022-07-22 21:42:11,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2415 transitions. [2022-07-22 21:42:11,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:11,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2415 transitions. [2022-07-22 21:42:11,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.0) internal successors, (2415), 3 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,333 INFO L186 Difference]: Start difference. First operand has 758 places, 805 transitions, 1752 flow. Second operand 3 states and 2415 transitions. [2022-07-22 21:42:11,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 817 transitions, 1864 flow [2022-07-22 21:42:11,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 817 transitions, 1848 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:42:11,346 INFO L242 Difference]: Finished difference. Result has 760 places, 805 transitions, 1768 flow [2022-07-22 21:42:11,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1768, PETRI_PLACES=760, PETRI_TRANSITIONS=805} [2022-07-22 21:42:11,348 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 4 predicate places. [2022-07-22 21:42:11,348 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 805 transitions, 1768 flow [2022-07-22 21:42:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 797.3333333333334) internal successors, (2392), 3 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:11,349 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:11,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:42:11,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1028007672, now seen corresponding path program 1 times [2022-07-22 21:42:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:11,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536842239] [2022-07-22 21:42:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:42:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536842239] [2022-07-22 21:42:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536842239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:11,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:11,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:42:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225334939] [2022-07-22 21:42:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:42:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:42:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:42:11,441 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 774 out of 851 [2022-07-22 21:42:11,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 805 transitions, 1768 flow. Second operand has 5 states, 5 states have (on average 779.4) internal successors, (3897), 5 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:11,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 774 of 851 [2022-07-22 21:42:11,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:11,754 INFO L129 PetriNetUnfolder]: 54/1036 cut-off events. [2022-07-22 21:42:11,754 INFO L130 PetriNetUnfolder]: For 136/174 co-relation queries the response was YES. [2022-07-22 21:42:11,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 1036 events. 54/1036 cut-off events. For 136/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5296 event pairs, 0 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 1190. Up to 55 conditions per place. [2022-07-22 21:42:11,789 INFO L132 encePairwiseOnDemand]: 836/851 looper letters, 39 selfloop transitions, 12 changer transitions 0/817 dead transitions. [2022-07-22 21:42:11,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 817 transitions, 1894 flow [2022-07-22 21:42:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:42:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:42:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3924 transitions. [2022-07-22 21:42:11,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9222091656874265 [2022-07-22 21:42:11,797 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3924 transitions. [2022-07-22 21:42:11,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3924 transitions. [2022-07-22 21:42:11,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:11,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3924 transitions. [2022-07-22 21:42:11,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 784.8) internal successors, (3924), 5 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 851.0) internal successors, (5106), 6 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 851.0) internal successors, (5106), 6 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,812 INFO L186 Difference]: Start difference. First operand has 760 places, 805 transitions, 1768 flow. Second operand 5 states and 3924 transitions. [2022-07-22 21:42:11,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 817 transitions, 1894 flow [2022-07-22 21:42:11,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 817 transitions, 1886 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:11,826 INFO L242 Difference]: Finished difference. Result has 764 places, 808 transitions, 1808 flow [2022-07-22 21:42:11,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1808, PETRI_PLACES=764, PETRI_TRANSITIONS=808} [2022-07-22 21:42:11,830 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 8 predicate places. [2022-07-22 21:42:11,830 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 808 transitions, 1808 flow [2022-07-22 21:42:11,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 779.4) internal successors, (3897), 5 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:11,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:11,831 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:11,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:42:11,832 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -152592993, now seen corresponding path program 1 times [2022-07-22 21:42:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:11,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792205944] [2022-07-22 21:42:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:42:11,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:11,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792205944] [2022-07-22 21:42:11,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792205944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:42:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659035495] [2022-07-22 21:42:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:11,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:42:11,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:42:11,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:42:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:42:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:42:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:42:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:42:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:42:12,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659035495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:42:12,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:42:12,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-22 21:42:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36508911] [2022-07-22 21:42:12,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:42:12,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:42:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:42:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:42:12,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 771 out of 851 [2022-07-22 21:42:12,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 808 transitions, 1808 flow. Second operand has 15 states, 15 states have (on average 775.0666666666667) internal successors, (11626), 15 states have internal predecessors, (11626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:12,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:12,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 771 of 851 [2022-07-22 21:42:12,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:12,964 INFO L129 PetriNetUnfolder]: 54/1060 cut-off events. [2022-07-22 21:42:12,965 INFO L130 PetriNetUnfolder]: For 127/164 co-relation queries the response was YES. [2022-07-22 21:42:12,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 1060 events. 54/1060 cut-off events. For 127/164 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5257 event pairs, 0 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 1260. Up to 46 conditions per place. [2022-07-22 21:42:12,998 INFO L132 encePairwiseOnDemand]: 827/851 looper letters, 42 selfloop transitions, 33 changer transitions 0/838 dead transitions. [2022-07-22 21:42:12,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 838 transitions, 2024 flow [2022-07-22 21:42:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:42:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:42:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 8562 transitions. [2022-07-22 21:42:13,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9146458711676103 [2022-07-22 21:42:13,014 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 8562 transitions. [2022-07-22 21:42:13,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 8562 transitions. [2022-07-22 21:42:13,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:13,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 8562 transitions. [2022-07-22 21:42:13,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 778.3636363636364) internal successors, (8562), 11 states have internal predecessors, (8562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:13,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 851.0) internal successors, (10212), 12 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:13,046 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 851.0) internal successors, (10212), 12 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:13,047 INFO L186 Difference]: Start difference. First operand has 764 places, 808 transitions, 1808 flow. Second operand 11 states and 8562 transitions. [2022-07-22 21:42:13,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 838 transitions, 2024 flow [2022-07-22 21:42:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 838 transitions, 2006 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:42:13,061 INFO L242 Difference]: Finished difference. Result has 774 places, 826 transitions, 1957 flow [2022-07-22 21:42:13,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1957, PETRI_PLACES=774, PETRI_TRANSITIONS=826} [2022-07-22 21:42:13,063 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 18 predicate places. [2022-07-22 21:42:13,063 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 826 transitions, 1957 flow [2022-07-22 21:42:13,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 775.0666666666667) internal successors, (11626), 15 states have internal predecessors, (11626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:13,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:13,075 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:13,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:42:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:13,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -220081363, now seen corresponding path program 2 times [2022-07-22 21:42:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:13,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042122052] [2022-07-22 21:42:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 21:42:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042122052] [2022-07-22 21:42:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042122052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:42:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70832671] [2022-07-22 21:42:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:42:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:42:13,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:42:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:42:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:42:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:42:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:42:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:42:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 21:42:13,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:42:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70832671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:13,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:42:13,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-22 21:42:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225737557] [2022-07-22 21:42:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:42:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:42:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:42:13,730 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 755 out of 851 [2022-07-22 21:42:13,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 826 transitions, 1957 flow. Second operand has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:13,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:13,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 755 of 851 [2022-07-22 21:42:13,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:15,669 INFO L129 PetriNetUnfolder]: 1439/7059 cut-off events. [2022-07-22 21:42:15,669 INFO L130 PetriNetUnfolder]: For 3251/3619 co-relation queries the response was YES. [2022-07-22 21:42:15,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11045 conditions, 7059 events. 1439/7059 cut-off events. For 3251/3619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 74434 event pairs, 703 based on Foata normal form. 4/6478 useless extension candidates. Maximal degree in co-relation 11031. Up to 1306 conditions per place. [2022-07-22 21:42:15,902 INFO L132 encePairwiseOnDemand]: 838/851 looper letters, 111 selfloop transitions, 23 changer transitions 2/896 dead transitions. [2022-07-22 21:42:15,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 896 transitions, 2413 flow [2022-07-22 21:42:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5414 transitions. [2022-07-22 21:42:15,912 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9088467349336915 [2022-07-22 21:42:15,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5414 transitions. [2022-07-22 21:42:15,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5414 transitions. [2022-07-22 21:42:15,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:15,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5414 transitions. [2022-07-22 21:42:15,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 773.4285714285714) internal successors, (5414), 7 states have internal predecessors, (5414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:15,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:15,934 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:15,934 INFO L186 Difference]: Start difference. First operand has 774 places, 826 transitions, 1957 flow. Second operand 7 states and 5414 transitions. [2022-07-22 21:42:15,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 896 transitions, 2413 flow [2022-07-22 21:42:15,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 896 transitions, 2388 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-22 21:42:15,955 INFO L242 Difference]: Finished difference. Result has 780 places, 838 transitions, 2035 flow [2022-07-22 21:42:15,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2035, PETRI_PLACES=780, PETRI_TRANSITIONS=838} [2022-07-22 21:42:15,958 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 24 predicate places. [2022-07-22 21:42:15,958 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 838 transitions, 2035 flow [2022-07-22 21:42:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:15,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:15,961 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:15,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:42:16,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 21:42:16,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1347170811, now seen corresponding path program 3 times [2022-07-22 21:42:16,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:16,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527950948] [2022-07-22 21:42:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 21:42:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:16,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527950948] [2022-07-22 21:42:16,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527950948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:42:16,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462718854] [2022-07-22 21:42:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:42:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:42:16,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:42:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:42:16,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 21:42:16,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:42:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:42:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:42:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 21:42:16,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:42:16,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462718854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:16,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:42:16,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-22 21:42:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628099675] [2022-07-22 21:42:16,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:16,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:42:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:42:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:42:16,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 755 out of 851 [2022-07-22 21:42:16,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 838 transitions, 2035 flow. Second operand has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:16,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:16,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 755 of 851 [2022-07-22 21:42:16,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:19,061 INFO L129 PetriNetUnfolder]: 1616/9270 cut-off events. [2022-07-22 21:42:19,061 INFO L130 PetriNetUnfolder]: For 4815/5157 co-relation queries the response was YES. [2022-07-22 21:42:19,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13438 conditions, 9270 events. 1616/9270 cut-off events. For 4815/5157 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 105244 event pairs, 326 based on Foata normal form. 72/8651 useless extension candidates. Maximal degree in co-relation 13421. Up to 860 conditions per place. [2022-07-22 21:42:19,231 INFO L132 encePairwiseOnDemand]: 824/851 looper letters, 132 selfloop transitions, 42 changer transitions 3/937 dead transitions. [2022-07-22 21:42:19,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 937 transitions, 2763 flow [2022-07-22 21:42:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:42:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:42:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6949 transitions. [2022-07-22 21:42:19,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072986029507769 [2022-07-22 21:42:19,242 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6949 transitions. [2022-07-22 21:42:19,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6949 transitions. [2022-07-22 21:42:19,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:19,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6949 transitions. [2022-07-22 21:42:19,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 772.1111111111111) internal successors, (6949), 9 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:19,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 851.0) internal successors, (8510), 10 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:19,261 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 851.0) internal successors, (8510), 10 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:19,261 INFO L186 Difference]: Start difference. First operand has 780 places, 838 transitions, 2035 flow. Second operand 9 states and 6949 transitions. [2022-07-22 21:42:19,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 937 transitions, 2763 flow [2022-07-22 21:42:19,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 937 transitions, 2763 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:42:19,281 INFO L242 Difference]: Finished difference. Result has 792 places, 862 transitions, 2344 flow [2022-07-22 21:42:19,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2344, PETRI_PLACES=792, PETRI_TRANSITIONS=862} [2022-07-22 21:42:19,283 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 36 predicate places. [2022-07-22 21:42:19,283 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 862 transitions, 2344 flow [2022-07-22 21:42:19,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 758.6) internal successors, (3793), 5 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:19,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:19,284 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:19,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:42:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:19,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1558049619, now seen corresponding path program 4 times [2022-07-22 21:42:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569612756] [2022-07-22 21:42:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 21:42:19,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569612756] [2022-07-22 21:42:19,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569612756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:42:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566693850] [2022-07-22 21:42:19,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:42:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:42:19,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:42:19,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:42:19,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:42:19,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:42:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:42:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:42:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 21:42:19,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:42:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 21:42:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566693850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:42:20,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:42:20,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-07-22 21:42:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259945517] [2022-07-22 21:42:20,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:42:20,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:42:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:42:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:42:20,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 771 out of 851 [2022-07-22 21:42:20,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 862 transitions, 2344 flow. Second operand has 22 states, 22 states have (on average 774.6818181818181) internal successors, (17043), 22 states have internal predecessors, (17043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:20,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:20,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 771 of 851 [2022-07-22 21:42:20,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:20,892 INFO L129 PetriNetUnfolder]: 142/1950 cut-off events. [2022-07-22 21:42:20,892 INFO L130 PetriNetUnfolder]: For 1179/1316 co-relation queries the response was YES. [2022-07-22 21:42:20,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 1950 events. 142/1950 cut-off events. For 1179/1316 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 14117 event pairs, 9 based on Foata normal form. 6/1831 useless extension candidates. Maximal degree in co-relation 2800. Up to 75 conditions per place. [2022-07-22 21:42:20,954 INFO L132 encePairwiseOnDemand]: 827/851 looper letters, 54 selfloop transitions, 51 changer transitions 0/904 dead transitions. [2022-07-22 21:42:20,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 904 transitions, 2722 flow [2022-07-22 21:42:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:42:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:42:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 13218 transitions. [2022-07-22 21:42:20,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9136655837423101 [2022-07-22 21:42:20,974 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 13218 transitions. [2022-07-22 21:42:20,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 13218 transitions. [2022-07-22 21:42:20,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:20,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 13218 transitions. [2022-07-22 21:42:20,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 777.5294117647059) internal successors, (13218), 17 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:21,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 851.0) internal successors, (15318), 18 states have internal predecessors, (15318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:21,005 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 851.0) internal successors, (15318), 18 states have internal predecessors, (15318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:21,005 INFO L186 Difference]: Start difference. First operand has 792 places, 862 transitions, 2344 flow. Second operand 17 states and 13218 transitions. [2022-07-22 21:42:21,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 904 transitions, 2722 flow [2022-07-22 21:42:21,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 904 transitions, 2714 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:21,025 INFO L242 Difference]: Finished difference. Result has 809 places, 883 transitions, 2599 flow [2022-07-22 21:42:21,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2599, PETRI_PLACES=809, PETRI_TRANSITIONS=883} [2022-07-22 21:42:21,026 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 53 predicate places. [2022-07-22 21:42:21,027 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 883 transitions, 2599 flow [2022-07-22 21:42:21,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 774.6818181818181) internal successors, (17043), 22 states have internal predecessors, (17043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:21,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:21,029 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:21,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:42:21,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:42:21,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2100223413, now seen corresponding path program 5 times [2022-07-22 21:42:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:21,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483236898] [2022-07-22 21:42:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:21,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483236898] [2022-07-22 21:42:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483236898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:21,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191053203] [2022-07-22 21:42:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:21,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-22 21:42:21,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 883 transitions, 2599 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:21,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:21,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-22 21:42:21,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:23,639 INFO L129 PetriNetUnfolder]: 892/10458 cut-off events. [2022-07-22 21:42:23,640 INFO L130 PetriNetUnfolder]: For 1809/1960 co-relation queries the response was YES. [2022-07-22 21:42:23,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12318 conditions, 10458 events. 892/10458 cut-off events. For 1809/1960 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 112535 event pairs, 93 based on Foata normal form. 4/9428 useless extension candidates. Maximal degree in co-relation 12293. Up to 303 conditions per place. [2022-07-22 21:42:23,827 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 28 selfloop transitions, 4 changer transitions 0/892 dead transitions. [2022-07-22 21:42:23,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 892 transitions, 2685 flow [2022-07-22 21:42:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2403 transitions. [2022-07-22 21:42:23,832 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9412455934195064 [2022-07-22 21:42:23,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2403 transitions. [2022-07-22 21:42:23,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2403 transitions. [2022-07-22 21:42:23,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:23,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2403 transitions. [2022-07-22 21:42:23,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 801.0) internal successors, (2403), 3 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:23,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:23,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:23,838 INFO L186 Difference]: Start difference. First operand has 809 places, 883 transitions, 2599 flow. Second operand 3 states and 2403 transitions. [2022-07-22 21:42:23,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 892 transitions, 2685 flow [2022-07-22 21:42:23,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 803 places, 892 transitions, 2618 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-07-22 21:42:23,860 INFO L242 Difference]: Finished difference. Result has 804 places, 884 transitions, 2550 flow [2022-07-22 21:42:23,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=801, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2550, PETRI_PLACES=804, PETRI_TRANSITIONS=884} [2022-07-22 21:42:23,862 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 48 predicate places. [2022-07-22 21:42:23,862 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 884 transitions, 2550 flow [2022-07-22 21:42:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:23,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:23,863 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:42:23,863 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -727000354, now seen corresponding path program 1 times [2022-07-22 21:42:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943293685] [2022-07-22 21:42:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:23,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:23,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943293685] [2022-07-22 21:42:23,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943293685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:23,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:23,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250859559] [2022-07-22 21:42:23,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:23,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:23,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-22 21:42:23,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 884 transitions, 2550 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:23,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:23,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-22 21:42:23,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:26,512 INFO L129 PetriNetUnfolder]: 648/8930 cut-off events. [2022-07-22 21:42:26,513 INFO L130 PetriNetUnfolder]: For 2549/2836 co-relation queries the response was YES. [2022-07-22 21:42:26,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11349 conditions, 8930 events. 648/8930 cut-off events. For 2549/2836 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 91115 event pairs, 39 based on Foata normal form. 0/8232 useless extension candidates. Maximal degree in co-relation 11323. Up to 191 conditions per place. [2022-07-22 21:42:26,686 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 29 selfloop transitions, 4 changer transitions 0/894 dead transitions. [2022-07-22 21:42:26,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 894 transitions, 2641 flow [2022-07-22 21:42:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2404 transitions. [2022-07-22 21:42:26,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416372894633764 [2022-07-22 21:42:26,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2404 transitions. [2022-07-22 21:42:26,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2404 transitions. [2022-07-22 21:42:26,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:26,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2404 transitions. [2022-07-22 21:42:26,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 801.3333333333334) internal successors, (2404), 3 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:26,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:26,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:26,697 INFO L186 Difference]: Start difference. First operand has 804 places, 884 transitions, 2550 flow. Second operand 3 states and 2404 transitions. [2022-07-22 21:42:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 894 transitions, 2641 flow [2022-07-22 21:42:26,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 894 transitions, 2637 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:26,735 INFO L242 Difference]: Finished difference. Result has 806 places, 885 transitions, 2564 flow [2022-07-22 21:42:26,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2564, PETRI_PLACES=806, PETRI_TRANSITIONS=885} [2022-07-22 21:42:26,737 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 50 predicate places. [2022-07-22 21:42:26,737 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 885 transitions, 2564 flow [2022-07-22 21:42:26,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:26,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:26,739 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:26,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:42:26,739 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1159849994, now seen corresponding path program 1 times [2022-07-22 21:42:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:26,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630563672] [2022-07-22 21:42:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630563672] [2022-07-22 21:42:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630563672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:26,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:26,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:42:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506123308] [2022-07-22 21:42:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:26,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:42:26,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:42:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:42:26,843 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 790 out of 851 [2022-07-22 21:42:26,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 885 transitions, 2564 flow. Second operand has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:26,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:26,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 790 of 851 [2022-07-22 21:42:26,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:28,852 INFO L129 PetriNetUnfolder]: 1172/9283 cut-off events. [2022-07-22 21:42:28,852 INFO L130 PetriNetUnfolder]: For 1926/2314 co-relation queries the response was YES. [2022-07-22 21:42:29,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11453 conditions, 9283 events. 1172/9283 cut-off events. For 1926/2314 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 101492 event pairs, 390 based on Foata normal form. 2/8053 useless extension candidates. Maximal degree in co-relation 11426. Up to 934 conditions per place. [2022-07-22 21:42:29,052 INFO L132 encePairwiseOnDemand]: 846/851 looper letters, 27 selfloop transitions, 4 changer transitions 0/893 dead transitions. [2022-07-22 21:42:29,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 893 transitions, 2645 flow [2022-07-22 21:42:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:42:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:42:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2402 transitions. [2022-07-22 21:42:29,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9408538973756365 [2022-07-22 21:42:29,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2402 transitions. [2022-07-22 21:42:29,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2402 transitions. [2022-07-22 21:42:29,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:29,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2402 transitions. [2022-07-22 21:42:29,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 800.6666666666666) internal successors, (2402), 3 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:29,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:29,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 851.0) internal successors, (3404), 4 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:29,062 INFO L186 Difference]: Start difference. First operand has 806 places, 885 transitions, 2564 flow. Second operand 3 states and 2402 transitions. [2022-07-22 21:42:29,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 893 transitions, 2645 flow [2022-07-22 21:42:29,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 893 transitions, 2641 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:29,082 INFO L242 Difference]: Finished difference. Result has 808 places, 886 transitions, 2578 flow [2022-07-22 21:42:29,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2578, PETRI_PLACES=808, PETRI_TRANSITIONS=886} [2022-07-22 21:42:29,084 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 52 predicate places. [2022-07-22 21:42:29,084 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 886 transitions, 2578 flow [2022-07-22 21:42:29,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 793.6666666666666) internal successors, (2381), 3 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:29,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:29,085 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:29,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:42:29,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -86089824, now seen corresponding path program 1 times [2022-07-22 21:42:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:29,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104509686] [2022-07-22 21:42:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104509686] [2022-07-22 21:42:29,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104509686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:29,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:29,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482047860] [2022-07-22 21:42:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:29,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 758 out of 851 [2022-07-22 21:42:29,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 886 transitions, 2578 flow. Second operand has 6 states, 6 states have (on average 764.5) internal successors, (4587), 6 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:29,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:29,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 758 of 851 [2022-07-22 21:42:29,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:31,497 INFO L129 PetriNetUnfolder]: 595/8051 cut-off events. [2022-07-22 21:42:31,497 INFO L130 PetriNetUnfolder]: For 2064/2461 co-relation queries the response was YES. [2022-07-22 21:42:31,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10313 conditions, 8051 events. 595/8051 cut-off events. For 2064/2461 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 83175 event pairs, 52 based on Foata normal form. 26/7394 useless extension candidates. Maximal degree in co-relation 10285. Up to 435 conditions per place. [2022-07-22 21:42:31,781 INFO L132 encePairwiseOnDemand]: 845/851 looper letters, 55 selfloop transitions, 3 changer transitions 4/900 dead transitions. [2022-07-22 21:42:31,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 900 transitions, 2739 flow [2022-07-22 21:42:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5369 transitions. [2022-07-22 21:42:31,786 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9012925969447708 [2022-07-22 21:42:31,786 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5369 transitions. [2022-07-22 21:42:31,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5369 transitions. [2022-07-22 21:42:31,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:31,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5369 transitions. [2022-07-22 21:42:31,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 767.0) internal successors, (5369), 7 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:31,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:31,797 INFO L186 Difference]: Start difference. First operand has 808 places, 886 transitions, 2578 flow. Second operand 7 states and 5369 transitions. [2022-07-22 21:42:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 900 transitions, 2739 flow [2022-07-22 21:42:31,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 900 transitions, 2735 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:42:31,823 INFO L242 Difference]: Finished difference. Result has 818 places, 888 transitions, 2599 flow [2022-07-22 21:42:31,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=818, PETRI_TRANSITIONS=888} [2022-07-22 21:42:31,824 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 62 predicate places. [2022-07-22 21:42:31,825 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 888 transitions, 2599 flow [2022-07-22 21:42:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 764.5) internal successors, (4587), 6 states have internal predecessors, (4587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:31,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:31,826 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:42:31,826 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash 703092806, now seen corresponding path program 1 times [2022-07-22 21:42:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772761222] [2022-07-22 21:42:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:31,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:31,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:31,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772761222] [2022-07-22 21:42:31,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772761222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:31,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:31,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946508099] [2022-07-22 21:42:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:31,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:31,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:31,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-22 21:42:31,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 888 transitions, 2599 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:31,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:31,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-22 21:42:31,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:44,287 INFO L129 PetriNetUnfolder]: 8585/49260 cut-off events. [2022-07-22 21:42:44,287 INFO L130 PetriNetUnfolder]: For 40554/56446 co-relation queries the response was YES. [2022-07-22 21:42:44,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78648 conditions, 49260 events. 8585/49260 cut-off events. For 40554/56446 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 706252 event pairs, 3032 based on Foata normal form. 617/46700 useless extension candidates. Maximal degree in co-relation 78615. Up to 4529 conditions per place. [2022-07-22 21:42:45,254 INFO L132 encePairwiseOnDemand]: 838/851 looper letters, 212 selfloop transitions, 21 changer transitions 4/1034 dead transitions. [2022-07-22 21:42:45,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 1034 transitions, 3688 flow [2022-07-22 21:42:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:42:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:42:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5432 transitions. [2022-07-22 21:42:45,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9118683901292597 [2022-07-22 21:42:45,261 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5432 transitions. [2022-07-22 21:42:45,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5432 transitions. [2022-07-22 21:42:45,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:42:45,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5432 transitions. [2022-07-22 21:42:45,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 776.0) internal successors, (5432), 7 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:45,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:45,275 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 851.0) internal successors, (6808), 8 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:45,275 INFO L186 Difference]: Start difference. First operand has 818 places, 888 transitions, 2599 flow. Second operand 7 states and 5432 transitions. [2022-07-22 21:42:45,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 1034 transitions, 3688 flow [2022-07-22 21:42:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 1034 transitions, 3683 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:42:45,460 INFO L242 Difference]: Finished difference. Result has 824 places, 908 transitions, 2857 flow [2022-07-22 21:42:45,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=824, PETRI_TRANSITIONS=908} [2022-07-22 21:42:45,461 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 68 predicate places. [2022-07-22 21:42:45,462 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 908 transitions, 2857 flow [2022-07-22 21:42:45,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:45,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:42:45,463 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:42:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:42:45,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:42:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:42:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 528390626, now seen corresponding path program 2 times [2022-07-22 21:42:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:42:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974367588] [2022-07-22 21:42:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:42:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:42:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:42:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:42:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:42:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974367588] [2022-07-22 21:42:45,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974367588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:42:45,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:42:45,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:42:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210567639] [2022-07-22 21:42:45,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:42:45,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:42:45,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:42:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:42:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:42:45,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-22 21:42:45,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 908 transitions, 2857 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:42:45,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:42:45,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-22 21:42:45,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:42:59,950 INFO L129 PetriNetUnfolder]: 9390/56262 cut-off events. [2022-07-22 21:42:59,950 INFO L130 PetriNetUnfolder]: For 53739/62951 co-relation queries the response was YES. [2022-07-22 21:43:00,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91328 conditions, 56262 events. 9390/56262 cut-off events. For 53739/62951 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 832646 event pairs, 4757 based on Foata normal form. 297/53561 useless extension candidates. Maximal degree in co-relation 91293. Up to 8166 conditions per place. [2022-07-22 21:43:01,092 INFO L132 encePairwiseOnDemand]: 835/851 looper letters, 195 selfloop transitions, 35 changer transitions 4/1031 dead transitions. [2022-07-22 21:43:01,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1031 transitions, 3784 flow [2022-07-22 21:43:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:43:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:43:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4666 transitions. [2022-07-22 21:43:01,095 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9138268703486094 [2022-07-22 21:43:01,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4666 transitions. [2022-07-22 21:43:01,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4666 transitions. [2022-07-22 21:43:01,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:01,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4666 transitions. [2022-07-22 21:43:01,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 777.6666666666666) internal successors, (4666), 6 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 851.0) internal successors, (5957), 7 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 851.0) internal successors, (5957), 7 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,105 INFO L186 Difference]: Start difference. First operand has 824 places, 908 transitions, 2857 flow. Second operand 6 states and 4666 transitions. [2022-07-22 21:43:01,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1031 transitions, 3784 flow [2022-07-22 21:43:01,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 1031 transitions, 3764 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-22 21:43:01,308 INFO L242 Difference]: Finished difference. Result has 833 places, 931 transitions, 3162 flow [2022-07-22 21:43:01,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=851, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3162, PETRI_PLACES=833, PETRI_TRANSITIONS=931} [2022-07-22 21:43:01,310 INFO L279 CegarLoopForPetriNet]: 756 programPoint places, 77 predicate places. [2022-07-22 21:43:01,310 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 931 transitions, 3162 flow [2022-07-22 21:43:01,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:01,311 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:43:01,311 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:43:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash -779960328, now seen corresponding path program 3 times [2022-07-22 21:43:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:01,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680718581] [2022-07-22 21:43:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:01,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-07-22 21:43:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680718581] [2022-07-22 21:43:01,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680718581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:01,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:01,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:43:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253376717] [2022-07-22 21:43:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:43:01,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:43:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:43:01,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 851 [2022-07-22 21:43:01,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 931 transitions, 3162 flow. Second operand has 6 states, 6 states have (on average 751.6666666666666) internal successors, (4510), 6 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:01,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:01,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 851 [2022-07-22 21:43:01,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand