./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:17:41,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:17:41,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:17:41,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:17:41,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:17:41,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:17:41,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:17:41,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:17:41,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:17:41,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:17:41,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:17:41,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:17:41,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:17:41,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:17:41,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:17:41,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:17:41,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:17:41,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:17:41,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:17:41,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:17:41,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:17:41,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:17:41,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:17:41,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:17:41,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:17:41,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:17:41,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:17:41,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:17:41,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:17:41,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:17:41,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:17:41,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:17:41,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:17:41,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:17:41,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:17:41,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:17:41,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:17:41,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:17:41,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:17:41,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:17:41,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:17:41,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:17:41,802 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:17:41,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:17:41,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:17:41,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:17:41,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:17:41,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:17:41,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:17:41,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:17:41,804 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:17:41,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:17:41,804 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:17:41,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:17:41,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:17:41,806 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:17:41,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:17:41,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:17:41,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:17:41,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:17:41,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:17:41,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:17:41,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:17:41,808 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:17:41,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:17:41,808 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:17:41,808 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:17:42,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:17:42,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:17:42,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:17:42,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:17:42,108 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:17:42,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-31 01:17:43,291 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:17:43,497 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:17:43,503 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-31 01:17:43,509 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac0d47a9/0f2125975ed04e4ba59196d4644e9f78/FLAGee658c597 [2023-08-31 01:17:43,528 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac0d47a9/0f2125975ed04e4ba59196d4644e9f78 [2023-08-31 01:17:43,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:17:43,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:17:43,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:17:43,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:17:43,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:17:43,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2322e046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43, skipping insertion in model container [2023-08-31 01:17:43,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:17:43,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:17:43,719 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-31 01:17:43,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:17:43,743 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:17:43,777 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-31 01:17:43,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:17:43,788 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:17:43,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43 WrapperNode [2023-08-31 01:17:43,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:17:43,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:17:43,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:17:43,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:17:43,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,844 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-31 01:17:43,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:17:43,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:17:43,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:17:43,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:17:43,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:17:43,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:17:43,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:17:43,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:17:43,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (1/1) ... [2023-08-31 01:17:43,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:17:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:43,931 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) [2023-08-31 01:17:43,945 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 [2023-08-31 01:17:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:17:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:17:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:17:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:17:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:17:43,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:17:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:17:43,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:17:43,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:17:43,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:17:43,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:17:43,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:17:43,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:17:43,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:17:43,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:17:43,963 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:17:44,115 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:17:44,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:17:44,740 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:17:44,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:17:44,753 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 01:17:44,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:17:44 BoogieIcfgContainer [2023-08-31 01:17:44,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:17:44,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:17:44,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:17:44,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:17:44,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:17:43" (1/3) ... [2023-08-31 01:17:44,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45249ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:17:44, skipping insertion in model container [2023-08-31 01:17:44,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:17:43" (2/3) ... [2023-08-31 01:17:44,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45249ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:17:44, skipping insertion in model container [2023-08-31 01:17:44,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:17:44" (3/3) ... [2023-08-31 01:17:44,761 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-08-31 01:17:44,766 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:17:44,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:17:44,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:17:44,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:17:44,920 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:17:44,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 717 transitions, 1458 flow [2023-08-31 01:17:45,202 INFO L130 PetriNetUnfolder]: 73/714 cut-off events. [2023-08-31 01:17:45,202 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:17:45,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 714 events. 73/714 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2388 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-31 01:17:45,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 717 transitions, 1458 flow [2023-08-31 01:17:45,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 704 transitions, 1426 flow [2023-08-31 01:17:45,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:17:45,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-31 01:17:45,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 704 transitions, 1426 flow [2023-08-31 01:17:45,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 704 transitions, 1426 flow [2023-08-31 01:17:45,392 INFO L130 PetriNetUnfolder]: 73/704 cut-off events. [2023-08-31 01:17:45,393 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:17:45,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 704 events. 73/704 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-08-31 01:17:45,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-08-31 01:18:07,477 INFO L134 LiptonReduction]: Checked pairs total: 150057 [2023-08-31 01:18:07,478 INFO L136 LiptonReduction]: Total number of compositions: 891 [2023-08-31 01:18:07,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:18:07,499 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bbc631e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:18:07,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:18:07,506 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-08-31 01:18:07,506 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:18:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:07,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:07,508 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)] === [2023-08-31 01:18:07,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1427696023, now seen corresponding path program 1 times [2023-08-31 01:18:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:07,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497609124] [2023-08-31 01:18:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:07,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:07,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497609124] [2023-08-31 01:18:07,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497609124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:07,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:18:07,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340249484] [2023-08-31 01:18:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:07,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:18:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:18:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:18:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 661 out of 1608 [2023-08-31 01:18:07,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:07,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:07,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 661 of 1608 [2023-08-31 01:18:07,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:08,365 INFO L130 PetriNetUnfolder]: 2608/3503 cut-off events. [2023-08-31 01:18:08,366 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-31 01:18:08,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7267 conditions, 3503 events. 2608/3503 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12504 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6748. Up to 3501 conditions per place. [2023-08-31 01:18:08,378 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-31 01:18:08,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 218 flow [2023-08-31 01:18:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:18:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:18:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2037 transitions. [2023-08-31 01:18:08,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-08-31 01:18:08,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2037 transitions. [2023-08-31 01:18:08,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2037 transitions. [2023-08-31 01:18:08,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:08,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2037 transitions. [2023-08-31 01:18:08,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 679.0) internal successors, (2037), 3 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:08,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:08,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:08,415 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2037 transitions. [2023-08-31 01:18:08,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 218 flow [2023-08-31 01:18:08,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:18:08,420 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 132 flow [2023-08-31 01:18:08,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2023-08-31 01:18:08,424 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-31 01:18:08,424 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 132 flow [2023-08-31 01:18:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:08,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:08,425 INFO L208 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] [2023-08-31 01:18:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:18:08,426 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)] === [2023-08-31 01:18:08,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2065041558, now seen corresponding path program 1 times [2023-08-31 01:18:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435094949] [2023-08-31 01:18:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:18:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:08,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435094949] [2023-08-31 01:18:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435094949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042746889] [2023-08-31 01:18:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:08,594 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) [2023-08-31 01:18:08,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:18:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:18:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:18:08,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:18:08,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042746889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:08,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-31 01:18:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648297896] [2023-08-31 01:18:08,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:18:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:18:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:18:08,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-31 01:18:08,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:08,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:08,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-31 01:18:08,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:09,388 INFO L130 PetriNetUnfolder]: 2608/3512 cut-off events. [2023-08-31 01:18:09,388 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 01:18:09,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 3512 events. 2608/3512 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12508 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7112. Up to 3501 conditions per place. [2023-08-31 01:18:09,398 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 44 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2023-08-31 01:18:09,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 286 flow [2023-08-31 01:18:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:18:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:18:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3998 transitions. [2023-08-31 01:18:09,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2023-08-31 01:18:09,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3998 transitions. [2023-08-31 01:18:09,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3998 transitions. [2023-08-31 01:18:09,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:09,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3998 transitions. [2023-08-31 01:18:09,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 666.3333333333334) internal successors, (3998), 6 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:09,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:09,424 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:09,425 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 132 flow. Second operand 6 states and 3998 transitions. [2023-08-31 01:18:09,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 286 flow [2023-08-31 01:18:09,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:09,426 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 222 flow [2023-08-31 01:18:09,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-31 01:18:09,427 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-31 01:18:09,427 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 222 flow [2023-08-31 01:18:09,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:09,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:09,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:09,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:18:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:09,636 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)] === [2023-08-31 01:18:09,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash 773664469, now seen corresponding path program 2 times [2023-08-31 01:18:09,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064289834] [2023-08-31 01:18:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:18:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:09,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064289834] [2023-08-31 01:18:09,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064289834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:09,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969621466] [2023-08-31 01:18:09,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:18:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:09,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:09,837 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) [2023-08-31 01:18:09,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:18:09,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:18:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:18:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:18:11,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:18:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969621466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:11,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:18:11,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 01:18:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541171097] [2023-08-31 01:18:11,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:11,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:18:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-31 01:18:11,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:11,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:11,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-31 01:18:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:12,278 INFO L130 PetriNetUnfolder]: 2934/4017 cut-off events. [2023-08-31 01:18:12,278 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-31 01:18:12,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8213 conditions, 4017 events. 2934/4017 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15676 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8125. Up to 3431 conditions per place. [2023-08-31 01:18:12,292 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 96 selfloop transitions, 2 changer transitions 7/105 dead transitions. [2023-08-31 01:18:12,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 536 flow [2023-08-31 01:18:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3289 transitions. [2023-08-31 01:18:12,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090796019900497 [2023-08-31 01:18:12,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3289 transitions. [2023-08-31 01:18:12,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3289 transitions. [2023-08-31 01:18:12,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:12,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3289 transitions. [2023-08-31 01:18:12,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 657.8) internal successors, (3289), 5 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:12,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:12,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:12,333 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 222 flow. Second operand 5 states and 3289 transitions. [2023-08-31 01:18:12,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 536 flow [2023-08-31 01:18:12,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 512 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:12,339 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 213 flow [2023-08-31 01:18:12,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-31 01:18:12,340 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-31 01:18:12,340 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 213 flow [2023-08-31 01:18:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:12,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:12,343 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:12,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:12,547 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,SelfDestructingSolverStorable2 [2023-08-31 01:18:12,548 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)] === [2023-08-31 01:18:12,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1680310845, now seen corresponding path program 3 times [2023-08-31 01:18:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748425664] [2023-08-31 01:18:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:18:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748425664] [2023-08-31 01:18:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748425664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398404960] [2023-08-31 01:18:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:18:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:12,702 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) [2023-08-31 01:18:12,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:18:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:18:12,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:18:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 01:18:13,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:18:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398404960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:13,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:18:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-08-31 01:18:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500680325] [2023-08-31 01:18:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:18:13,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-08-31 01:18:13,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:13,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:13,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-08-31 01:18:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:15,051 INFO L130 PetriNetUnfolder]: 3124/4357 cut-off events. [2023-08-31 01:18:15,052 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2023-08-31 01:18:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 4357 events. 3124/4357 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18094 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9371. Up to 3869 conditions per place. [2023-08-31 01:18:15,073 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 100 selfloop transitions, 3 changer transitions 7/110 dead transitions. [2023-08-31 01:18:15,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 555 flow [2023-08-31 01:18:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3293 transitions. [2023-08-31 01:18:15,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095771144278607 [2023-08-31 01:18:15,080 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3293 transitions. [2023-08-31 01:18:15,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3293 transitions. [2023-08-31 01:18:15,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:15,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3293 transitions. [2023-08-31 01:18:15,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.6) internal successors, (3293), 5 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,108 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 213 flow. Second operand 5 states and 3293 transitions. [2023-08-31 01:18:15,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 555 flow [2023-08-31 01:18:15,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 546 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 01:18:15,112 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 230 flow [2023-08-31 01:18:15,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-31 01:18:15,113 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-08-31 01:18:15,113 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 230 flow [2023-08-31 01:18:15,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:15,115 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:15,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:15,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:15,320 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)] === [2023-08-31 01:18:15,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257897, now seen corresponding path program 4 times [2023-08-31 01:18:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:15,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381910549] [2023-08-31 01:18:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:18:15,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381910549] [2023-08-31 01:18:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381910549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761436470] [2023-08-31 01:18:15,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:18:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:15,480 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) [2023-08-31 01:18:15,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:18:15,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:18:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:18:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:18:15,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-31 01:18:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761436470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:15,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 01:18:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415823277] [2023-08-31 01:18:15,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:18:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:18:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:18:15,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-31 01:18:15,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:15,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-31 01:18:15,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:16,476 INFO L130 PetriNetUnfolder]: 3123/4352 cut-off events. [2023-08-31 01:18:16,477 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2023-08-31 01:18:16,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 4352 events. 3123/4352 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17812 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 9879. Up to 4338 conditions per place. [2023-08-31 01:18:16,493 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 46 selfloop transitions, 18 changer transitions 0/64 dead transitions. [2023-08-31 01:18:16,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 376 flow [2023-08-31 01:18:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:18:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:18:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4650 transitions. [2023-08-31 01:18:16,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131130063965885 [2023-08-31 01:18:16,502 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4650 transitions. [2023-08-31 01:18:16,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4650 transitions. [2023-08-31 01:18:16,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:16,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4650 transitions. [2023-08-31 01:18:16,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 664.2857142857143) internal successors, (4650), 7 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:16,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:16,520 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:16,520 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 230 flow. Second operand 7 states and 4650 transitions. [2023-08-31 01:18:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 376 flow [2023-08-31 01:18:16,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 370 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:18:16,523 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 292 flow [2023-08-31 01:18:16,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-08-31 01:18:16,524 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-31 01:18:16,524 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 292 flow [2023-08-31 01:18:16,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:16,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:16,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:16,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 01:18:16,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:16,735 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)] === [2023-08-31 01:18:16,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -472303414, now seen corresponding path program 5 times [2023-08-31 01:18:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:16,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357556031] [2023-08-31 01:18:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:17,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:17,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357556031] [2023-08-31 01:18:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357556031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:18:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725334517] [2023-08-31 01:18:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:18:18,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-31 01:18:18,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:18,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:18,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-31 01:18:18,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:19,896 INFO L130 PetriNetUnfolder]: 7479/10347 cut-off events. [2023-08-31 01:18:19,896 INFO L131 PetriNetUnfolder]: For 1820/1820 co-relation queries the response was YES. [2023-08-31 01:18:19,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22274 conditions, 10347 events. 7479/10347 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 51307 event pairs, 1252 based on Foata normal form. 1/8396 useless extension candidates. Maximal degree in co-relation 22161. Up to 3749 conditions per place. [2023-08-31 01:18:19,926 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 156 selfloop transitions, 42 changer transitions 1/199 dead transitions. [2023-08-31 01:18:19,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 199 transitions, 1028 flow [2023-08-31 01:18:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:18:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:18:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4632 transitions. [2023-08-31 01:18:19,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115138592750533 [2023-08-31 01:18:19,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4632 transitions. [2023-08-31 01:18:19,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4632 transitions. [2023-08-31 01:18:19,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:19,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4632 transitions. [2023-08-31 01:18:19,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 661.7142857142857) internal successors, (4632), 7 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:19,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:19,952 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:19,952 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 292 flow. Second operand 7 states and 4632 transitions. [2023-08-31 01:18:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 199 transitions, 1028 flow [2023-08-31 01:18:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 199 transitions, 992 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-31 01:18:19,956 INFO L231 Difference]: Finished difference. Result has 71 places, 107 transitions, 583 flow [2023-08-31 01:18:19,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=71, PETRI_TRANSITIONS=107} [2023-08-31 01:18:19,957 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-31 01:18:19,957 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 107 transitions, 583 flow [2023-08-31 01:18:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:19,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:19,958 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:18:19,959 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)] === [2023-08-31 01:18:19,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 952440716, now seen corresponding path program 6 times [2023-08-31 01:18:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154093120] [2023-08-31 01:18:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:20,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154093120] [2023-08-31 01:18:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154093120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:20,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:18:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512222941] [2023-08-31 01:18:20,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:18:20,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-31 01:18:20,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:20,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:20,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-31 01:18:20,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:23,043 INFO L130 PetriNetUnfolder]: 9673/13376 cut-off events. [2023-08-31 01:18:23,043 INFO L131 PetriNetUnfolder]: For 9800/9800 co-relation queries the response was YES. [2023-08-31 01:18:23,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 13376 events. 9673/13376 cut-off events. For 9800/9800 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67067 event pairs, 2739 based on Foata normal form. 1/11107 useless extension candidates. Maximal degree in co-relation 38175. Up to 7196 conditions per place. [2023-08-31 01:18:23,095 INFO L137 encePairwiseOnDemand]: 1595/1608 looper letters, 151 selfloop transitions, 47 changer transitions 2/200 dead transitions. [2023-08-31 01:18:23,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 200 transitions, 1371 flow [2023-08-31 01:18:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3294 transitions. [2023-08-31 01:18:23,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097014925373134 [2023-08-31 01:18:23,102 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3294 transitions. [2023-08-31 01:18:23,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3294 transitions. [2023-08-31 01:18:23,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:23,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3294 transitions. [2023-08-31 01:18:23,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.8) internal successors, (3294), 5 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:23,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:23,114 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:23,114 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 583 flow. Second operand 5 states and 3294 transitions. [2023-08-31 01:18:23,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 200 transitions, 1371 flow [2023-08-31 01:18:23,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 200 transitions, 1363 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-31 01:18:23,177 INFO L231 Difference]: Finished difference. Result has 79 places, 144 transitions, 1035 flow [2023-08-31 01:18:23,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=79, PETRI_TRANSITIONS=144} [2023-08-31 01:18:23,178 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-31 01:18:23,178 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 144 transitions, 1035 flow [2023-08-31 01:18:23,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:23,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:23,179 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:18:23,179 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)] === [2023-08-31 01:18:23,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1010676078, now seen corresponding path program 7 times [2023-08-31 01:18:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:23,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346098203] [2023-08-31 01:18:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:23,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346098203] [2023-08-31 01:18:24,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346098203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:24,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:24,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:18:24,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746600439] [2023-08-31 01:18:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:24,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:24,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:18:24,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-31 01:18:24,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 144 transitions, 1035 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:24,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:24,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-31 01:18:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:26,405 INFO L130 PetriNetUnfolder]: 10088/14013 cut-off events. [2023-08-31 01:18:26,405 INFO L131 PetriNetUnfolder]: For 18963/18963 co-relation queries the response was YES. [2023-08-31 01:18:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44718 conditions, 14013 events. 10088/14013 cut-off events. For 18963/18963 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71621 event pairs, 4629 based on Foata normal form. 1/11640 useless extension candidates. Maximal degree in co-relation 44614. Up to 11506 conditions per place. [2023-08-31 01:18:26,456 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 198 selfloop transitions, 43 changer transitions 2/243 dead transitions. [2023-08-31 01:18:26,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 243 transitions, 2044 flow [2023-08-31 01:18:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3304 transitions. [2023-08-31 01:18:26,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109452736318408 [2023-08-31 01:18:26,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3304 transitions. [2023-08-31 01:18:26,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3304 transitions. [2023-08-31 01:18:26,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:26,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3304 transitions. [2023-08-31 01:18:26,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 660.8) internal successors, (3304), 5 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:26,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:26,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:26,473 INFO L175 Difference]: Start difference. First operand has 79 places, 144 transitions, 1035 flow. Second operand 5 states and 3304 transitions. [2023-08-31 01:18:26,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 243 transitions, 2044 flow [2023-08-31 01:18:26,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 243 transitions, 2032 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-31 01:18:26,592 INFO L231 Difference]: Finished difference. Result has 86 places, 171 transitions, 1464 flow [2023-08-31 01:18:26,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1464, PETRI_PLACES=86, PETRI_TRANSITIONS=171} [2023-08-31 01:18:26,593 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-08-31 01:18:26,593 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 171 transitions, 1464 flow [2023-08-31 01:18:26,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:26,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:26,594 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:26,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:18:26,594 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)] === [2023-08-31 01:18:26,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1354860510, now seen corresponding path program 8 times [2023-08-31 01:18:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180810516] [2023-08-31 01:18:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:26,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:27,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:27,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180810516] [2023-08-31 01:18:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180810516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:27,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:27,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:18:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992887246] [2023-08-31 01:18:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:27,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:18:27,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 636 out of 1608 [2023-08-31 01:18:27,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 171 transitions, 1464 flow. Second operand has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:27,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:27,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 636 of 1608 [2023-08-31 01:18:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:30,005 INFO L130 PetriNetUnfolder]: 10233/14236 cut-off events. [2023-08-31 01:18:30,005 INFO L131 PetriNetUnfolder]: For 27028/27028 co-relation queries the response was YES. [2023-08-31 01:18:30,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49716 conditions, 14236 events. 10233/14236 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74045 event pairs, 2601 based on Foata normal form. 1/11817 useless extension candidates. Maximal degree in co-relation 49608. Up to 7212 conditions per place. [2023-08-31 01:18:30,083 INFO L137 encePairwiseOnDemand]: 1597/1608 looper letters, 190 selfloop transitions, 47 changer transitions 2/239 dead transitions. [2023-08-31 01:18:30,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 239 transitions, 2269 flow [2023-08-31 01:18:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3299 transitions. [2023-08-31 01:18:30,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103233830845771 [2023-08-31 01:18:30,088 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3299 transitions. [2023-08-31 01:18:30,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3299 transitions. [2023-08-31 01:18:30,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:30,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3299 transitions. [2023-08-31 01:18:30,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,098 INFO L175 Difference]: Start difference. First operand has 86 places, 171 transitions, 1464 flow. Second operand 5 states and 3299 transitions. [2023-08-31 01:18:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 239 transitions, 2269 flow [2023-08-31 01:18:30,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 239 transitions, 2261 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-31 01:18:30,371 INFO L231 Difference]: Finished difference. Result has 92 places, 180 transitions, 1699 flow [2023-08-31 01:18:30,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=92, PETRI_TRANSITIONS=180} [2023-08-31 01:18:30,371 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-31 01:18:30,372 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 180 transitions, 1699 flow [2023-08-31 01:18:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 640.4) internal successors, (3202), 5 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:30,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:18:30,373 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)] === [2023-08-31 01:18:30,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1151516539, now seen corresponding path program 1 times [2023-08-31 01:18:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071132987] [2023-08-31 01:18:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071132987] [2023-08-31 01:18:30,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071132987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:30,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:30,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:18:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537942887] [2023-08-31 01:18:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:18:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:18:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:18:30,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:18:30,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 180 transitions, 1699 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:30,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:30,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:18:30,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:33,239 INFO L130 PetriNetUnfolder]: 14718/20390 cut-off events. [2023-08-31 01:18:33,239 INFO L131 PetriNetUnfolder]: For 46162/46162 co-relation queries the response was YES. [2023-08-31 01:18:33,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74089 conditions, 20390 events. 14718/20390 cut-off events. For 46162/46162 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 106906 event pairs, 5671 based on Foata normal form. 280/17004 useless extension candidates. Maximal degree in co-relation 73978. Up to 13705 conditions per place. [2023-08-31 01:18:33,321 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 223 selfloop transitions, 12 changer transitions 0/235 dead transitions. [2023-08-31 01:18:33,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 235 transitions, 2581 flow [2023-08-31 01:18:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:18:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:18:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2074 transitions. [2023-08-31 01:18:33,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-08-31 01:18:33,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2074 transitions. [2023-08-31 01:18:33,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2074 transitions. [2023-08-31 01:18:33,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:33,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2074 transitions. [2023-08-31 01:18:33,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 691.3333333333334) internal successors, (2074), 3 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:33,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:33,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:33,331 INFO L175 Difference]: Start difference. First operand has 92 places, 180 transitions, 1699 flow. Second operand 3 states and 2074 transitions. [2023-08-31 01:18:33,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 235 transitions, 2581 flow [2023-08-31 01:18:33,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 235 transitions, 2490 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:33,800 INFO L231 Difference]: Finished difference. Result has 94 places, 170 transitions, 1544 flow [2023-08-31 01:18:33,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=94, PETRI_TRANSITIONS=170} [2023-08-31 01:18:33,801 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-08-31 01:18:33,801 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 170 transitions, 1544 flow [2023-08-31 01:18:33,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:33,802 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:18:33,802 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)] === [2023-08-31 01:18:33,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash -977446447, now seen corresponding path program 1 times [2023-08-31 01:18:33,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594123196] [2023-08-31 01:18:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:33,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:33,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594123196] [2023-08-31 01:18:33,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594123196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:33,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:33,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:18:33,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811011405] [2023-08-31 01:18:33,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:33,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:18:33,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:18:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:18:33,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:18:33,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 170 transitions, 1544 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:33,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:33,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:18:33,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:37,696 INFO L130 PetriNetUnfolder]: 19754/27154 cut-off events. [2023-08-31 01:18:37,697 INFO L131 PetriNetUnfolder]: For 60626/60626 co-relation queries the response was YES. [2023-08-31 01:18:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95880 conditions, 27154 events. 19754/27154 cut-off events. For 60626/60626 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 142925 event pairs, 7741 based on Foata normal form. 0/22232 useless extension candidates. Maximal degree in co-relation 95768. Up to 20577 conditions per place. [2023-08-31 01:18:37,818 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 219 selfloop transitions, 8 changer transitions 0/227 dead transitions. [2023-08-31 01:18:37,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 227 transitions, 2405 flow [2023-08-31 01:18:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:18:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:18:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2072 transitions. [2023-08-31 01:18:37,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295190713101161 [2023-08-31 01:18:37,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2072 transitions. [2023-08-31 01:18:37,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2072 transitions. [2023-08-31 01:18:37,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:37,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2072 transitions. [2023-08-31 01:18:37,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 690.6666666666666) internal successors, (2072), 3 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:37,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:37,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:37,828 INFO L175 Difference]: Start difference. First operand has 94 places, 170 transitions, 1544 flow. Second operand 3 states and 2072 transitions. [2023-08-31 01:18:37,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 227 transitions, 2405 flow [2023-08-31 01:18:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 227 transitions, 2388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:38,289 INFO L231 Difference]: Finished difference. Result has 96 places, 171 transitions, 1562 flow [2023-08-31 01:18:38,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1562, PETRI_PLACES=96, PETRI_TRANSITIONS=171} [2023-08-31 01:18:38,289 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-08-31 01:18:38,289 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 171 transitions, 1562 flow [2023-08-31 01:18:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:18:38,290 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)] === [2023-08-31 01:18:38,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1136703417, now seen corresponding path program 1 times [2023-08-31 01:18:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650822940] [2023-08-31 01:18:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:38,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650822940] [2023-08-31 01:18:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650822940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:38,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:38,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:18:38,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180178323] [2023-08-31 01:18:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:38,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:18:38,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:18:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:18:38,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-08-31 01:18:38,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 171 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:38,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:38,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-08-31 01:18:38,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:42,448 INFO L130 PetriNetUnfolder]: 21302/29548 cut-off events. [2023-08-31 01:18:42,448 INFO L131 PetriNetUnfolder]: For 67464/67464 co-relation queries the response was YES. [2023-08-31 01:18:42,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103929 conditions, 29548 events. 21302/29548 cut-off events. For 67464/67464 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 161445 event pairs, 9453 based on Foata normal form. 0/25586 useless extension candidates. Maximal degree in co-relation 103816. Up to 24393 conditions per place. [2023-08-31 01:18:42,589 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 187 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-08-31 01:18:42,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 206 transitions, 2158 flow [2023-08-31 01:18:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:18:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:18:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2023-08-31 01:18:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-08-31 01:18:42,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2023-08-31 01:18:42,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2023-08-31 01:18:42,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:42,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2023-08-31 01:18:42,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:42,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:42,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:42,598 INFO L175 Difference]: Start difference. First operand has 96 places, 171 transitions, 1562 flow. Second operand 3 states and 2076 transitions. [2023-08-31 01:18:42,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 206 transitions, 2158 flow [2023-08-31 01:18:43,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 206 transitions, 2147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:43,336 INFO L231 Difference]: Finished difference. Result has 98 places, 164 transitions, 1534 flow [2023-08-31 01:18:43,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=98, PETRI_TRANSITIONS=164} [2023-08-31 01:18:43,337 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-08-31 01:18:43,337 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 164 transitions, 1534 flow [2023-08-31 01:18:43,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:43,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:43,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:18:43,338 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)] === [2023-08-31 01:18:43,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -345962665, now seen corresponding path program 1 times [2023-08-31 01:18:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:43,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918501292] [2023-08-31 01:18:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:43,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:43,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918501292] [2023-08-31 01:18:43,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918501292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:43,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590575260] [2023-08-31 01:18:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:43,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:43,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:18:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:18:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:43,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:44,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590575260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:44,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:44,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:18:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472500208] [2023-08-31 01:18:44,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:18:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:18:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:18:44,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:18:44,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 164 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:44,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:44,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:18:44,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:48,671 INFO L130 PetriNetUnfolder]: 21832/30378 cut-off events. [2023-08-31 01:18:48,672 INFO L131 PetriNetUnfolder]: For 89086/89086 co-relation queries the response was YES. [2023-08-31 01:18:48,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112234 conditions, 30378 events. 21832/30378 cut-off events. For 89086/89086 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 168731 event pairs, 6353 based on Foata normal form. 4/26240 useless extension candidates. Maximal degree in co-relation 112120. Up to 27534 conditions per place. [2023-08-31 01:18:48,839 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 176 selfloop transitions, 12 changer transitions 53/241 dead transitions. [2023-08-31 01:18:48,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 241 transitions, 2573 flow [2023-08-31 01:18:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:18:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:18:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2735 transitions. [2023-08-31 01:18:48,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252176616915423 [2023-08-31 01:18:48,843 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2735 transitions. [2023-08-31 01:18:48,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2735 transitions. [2023-08-31 01:18:48,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:48,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2735 transitions. [2023-08-31 01:18:48,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.75) internal successors, (2735), 4 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:48,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:48,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:48,851 INFO L175 Difference]: Start difference. First operand has 98 places, 164 transitions, 1534 flow. Second operand 4 states and 2735 transitions. [2023-08-31 01:18:48,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 241 transitions, 2573 flow [2023-08-31 01:18:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 241 transitions, 2532 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-31 01:18:49,545 INFO L231 Difference]: Finished difference. Result has 103 places, 154 transitions, 1463 flow [2023-08-31 01:18:49,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1463, PETRI_PLACES=103, PETRI_TRANSITIONS=154} [2023-08-31 01:18:49,546 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-08-31 01:18:49,546 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 154 transitions, 1463 flow [2023-08-31 01:18:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 667.0) internal successors, (4002), 6 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:49,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:49,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 01:18:49,753 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)] === [2023-08-31 01:18:49,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1281119567, now seen corresponding path program 2 times [2023-08-31 01:18:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350968107] [2023-08-31 01:18:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:49,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:18:50,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350968107] [2023-08-31 01:18:50,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350968107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:18:50,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:18:50,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:18:50,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715578839] [2023-08-31 01:18:50,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:18:50,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:18:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:18:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:18:50,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-08-31 01:18:50,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 154 transitions, 1463 flow. Second operand has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:50,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:50,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-08-31 01:18:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:55,047 INFO L130 PetriNetUnfolder]: 23686/33394 cut-off events. [2023-08-31 01:18:55,047 INFO L131 PetriNetUnfolder]: For 83084/83084 co-relation queries the response was YES. [2023-08-31 01:18:55,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116472 conditions, 33394 events. 23686/33394 cut-off events. For 83084/83084 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 193830 event pairs, 10465 based on Foata normal form. 4/29010 useless extension candidates. Maximal degree in co-relation 116370. Up to 25764 conditions per place. [2023-08-31 01:18:55,315 INFO L137 encePairwiseOnDemand]: 1598/1608 looper letters, 216 selfloop transitions, 25 changer transitions 37/278 dead transitions. [2023-08-31 01:18:55,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 278 transitions, 2720 flow [2023-08-31 01:18:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:18:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:18:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3417 transitions. [2023-08-31 01:18:55,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-31 01:18:55,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3417 transitions. [2023-08-31 01:18:55,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3417 transitions. [2023-08-31 01:18:55,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:55,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3417 transitions. [2023-08-31 01:18:55,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 683.4) internal successors, (3417), 5 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:55,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:55,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:55,327 INFO L175 Difference]: Start difference. First operand has 103 places, 154 transitions, 1463 flow. Second operand 5 states and 3417 transitions. [2023-08-31 01:18:55,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 278 transitions, 2720 flow [2023-08-31 01:18:55,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 278 transitions, 2671 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-31 01:18:55,970 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1399 flow [2023-08-31 01:18:55,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1399, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2023-08-31 01:18:55,970 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2023-08-31 01:18:55,970 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1399 flow [2023-08-31 01:18:55,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 659.8) internal successors, (3299), 5 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:55,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:55,971 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:18:55,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 01:18:55,971 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)] === [2023-08-31 01:18:55,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 774602130, now seen corresponding path program 1 times [2023-08-31 01:18:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:55,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628020552] [2023-08-31 01:18:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628020552] [2023-08-31 01:18:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628020552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723893733] [2023-08-31 01:18:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:57,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:57,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:57,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:57,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:18:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:18:57,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:18:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723893733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:58,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:58,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-08-31 01:18:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524820004] [2023-08-31 01:18:58,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:18:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:18:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:19:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 595 out of 1608 [2023-08-31 01:19:00,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1399 flow. Second operand has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:00,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:00,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 595 of 1608 [2023-08-31 01:19:00,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:18,034 INFO L130 PetriNetUnfolder]: 60488/84802 cut-off events. [2023-08-31 01:19:18,034 INFO L131 PetriNetUnfolder]: For 210570/210570 co-relation queries the response was YES. [2023-08-31 01:19:18,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300185 conditions, 84802 events. 60488/84802 cut-off events. For 210570/210570 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 550289 event pairs, 2556 based on Foata normal form. 95/73114 useless extension candidates. Maximal degree in co-relation 300067. Up to 20483 conditions per place. [2023-08-31 01:19:18,803 INFO L137 encePairwiseOnDemand]: 1584/1608 looper letters, 804 selfloop transitions, 372 changer transitions 215/1391 dead transitions. [2023-08-31 01:19:18,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 1391 transitions, 12469 flow [2023-08-31 01:19:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-31 01:19:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-31 01:19:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 33514 transitions. [2023-08-31 01:19:18,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894617819990956 [2023-08-31 01:19:18,832 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 33514 transitions. [2023-08-31 01:19:18,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 33514 transitions. [2023-08-31 01:19:18,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:18,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 33514 transitions. [2023-08-31 01:19:18,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 609.3454545454546) internal successors, (33514), 55 states have internal predecessors, (33514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:18,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:18,915 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 1608.0) internal successors, (90048), 56 states have internal predecessors, (90048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:18,916 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1399 flow. Second operand 55 states and 33514 transitions. [2023-08-31 01:19:18,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 1391 transitions, 12469 flow [2023-08-31 01:19:25,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1391 transitions, 12134 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-08-31 01:19:25,136 INFO L231 Difference]: Finished difference. Result has 202 places, 522 transitions, 6233 flow [2023-08-31 01:19:25,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=6233, PETRI_PLACES=202, PETRI_TRANSITIONS=522} [2023-08-31 01:19:25,137 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2023-08-31 01:19:25,137 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 522 transitions, 6233 flow [2023-08-31 01:19:25,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 599.0) internal successors, (11381), 19 states have internal predecessors, (11381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:25,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:25,138 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:19:25,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:19:25,343 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)] === [2023-08-31 01:19:25,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash 138443101, now seen corresponding path program 1 times [2023-08-31 01:19:25,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:25,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387704339] [2023-08-31 01:19:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:25,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387704339] [2023-08-31 01:19:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387704339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231988094] [2023-08-31 01:19:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:25,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:19:25,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:19:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:19:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:25,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:19:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231988094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:25,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:25,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 01:19:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955199295] [2023-08-31 01:19:25,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:25,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:19:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:19:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:19:26,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:19:26,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 522 transitions, 6233 flow. Second operand has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:26,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:26,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:19:26,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:43,233 INFO L130 PetriNetUnfolder]: 56846/79425 cut-off events. [2023-08-31 01:19:43,233 INFO L131 PetriNetUnfolder]: For 820434/820434 co-relation queries the response was YES. [2023-08-31 01:19:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415880 conditions, 79425 events. 56846/79425 cut-off events. For 820434/820434 co-relation queries the response was YES. Maximal size of possible extension queue 1911. Compared 509818 event pairs, 20760 based on Foata normal form. 2/71097 useless extension candidates. Maximal degree in co-relation 415718. Up to 78712 conditions per place. [2023-08-31 01:19:44,785 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 514 selfloop transitions, 17 changer transitions 34/565 dead transitions. [2023-08-31 01:19:44,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 565 transitions, 7799 flow [2023-08-31 01:19:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:19:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:19:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2722 transitions. [2023-08-31 01:19:44,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319651741293535 [2023-08-31 01:19:44,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2722 transitions. [2023-08-31 01:19:44,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2722 transitions. [2023-08-31 01:19:44,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:44,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2722 transitions. [2023-08-31 01:19:44,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.5) internal successors, (2722), 4 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:44,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:44,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:44,794 INFO L175 Difference]: Start difference. First operand has 202 places, 522 transitions, 6233 flow. Second operand 4 states and 2722 transitions. [2023-08-31 01:19:44,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 565 transitions, 7799 flow [2023-08-31 01:19:54,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 565 transitions, 7622 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-08-31 01:19:54,505 INFO L231 Difference]: Finished difference. Result has 182 places, 520 transitions, 6152 flow [2023-08-31 01:19:54,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6152, PETRI_PLACES=182, PETRI_TRANSITIONS=520} [2023-08-31 01:19:54,505 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2023-08-31 01:19:54,505 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 520 transitions, 6152 flow [2023-08-31 01:19:54,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 670.0) internal successors, (4020), 6 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:54,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:54,506 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:19:54,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:54,713 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)] === [2023-08-31 01:19:54,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1248017317, now seen corresponding path program 2 times [2023-08-31 01:19:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:54,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220380888] [2023-08-31 01:19:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:19:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220380888] [2023-08-31 01:19:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220380888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:19:55,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:19:55,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:19:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075669051] [2023-08-31 01:19:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:19:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:19:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:19:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:19:55,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-08-31 01:19:55,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 520 transitions, 6152 flow. Second operand has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:55,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:55,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-08-31 01:19:55,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:11,717 INFO L130 PetriNetUnfolder]: 56465/78816 cut-off events. [2023-08-31 01:20:11,717 INFO L131 PetriNetUnfolder]: For 749513/749513 co-relation queries the response was YES. [2023-08-31 01:20:12,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393717 conditions, 78816 events. 56465/78816 cut-off events. For 749513/749513 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 504732 event pairs, 27498 based on Foata normal form. 2/70516 useless extension candidates. Maximal degree in co-relation 393584. Up to 78291 conditions per place. [2023-08-31 01:20:13,092 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 508 selfloop transitions, 0 changer transitions 41/549 dead transitions. [2023-08-31 01:20:13,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 549 transitions, 7461 flow [2023-08-31 01:20:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:20:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:20:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2716 transitions. [2023-08-31 01:20:13,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-08-31 01:20:13,095 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2716 transitions. [2023-08-31 01:20:13,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2716 transitions. [2023-08-31 01:20:13,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:13,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2716 transitions. [2023-08-31 01:20:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:13,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:13,100 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:13,101 INFO L175 Difference]: Start difference. First operand has 182 places, 520 transitions, 6152 flow. Second operand 4 states and 2716 transitions. [2023-08-31 01:20:13,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 549 transitions, 7461 flow [2023-08-31 01:20:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 549 transitions, 7273 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-31 01:20:17,673 INFO L231 Difference]: Finished difference. Result has 176 places, 508 transitions, 5792 flow [2023-08-31 01:20:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5792, PETRI_PLACES=176, PETRI_TRANSITIONS=508} [2023-08-31 01:20:17,673 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2023-08-31 01:20:17,673 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 508 transitions, 5792 flow [2023-08-31 01:20:17,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:17,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:17,674 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:20:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:20:17,674 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)] === [2023-08-31 01:20:17,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1938677828, now seen corresponding path program 2 times [2023-08-31 01:20:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955195324] [2023-08-31 01:20:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:20:18,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:18,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955195324] [2023-08-31 01:20:18,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955195324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:18,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596138746] [2023-08-31 01:20:18,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:20:18,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:18,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:18,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:20:18,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:20:18,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:20:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:20:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:20:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:20:19,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596138746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:19,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:19,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 01:20:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195662173] [2023-08-31 01:20:19,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:19,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:20:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:20:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:20:19,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 644 out of 1608 [2023-08-31 01:20:19,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 508 transitions, 5792 flow. Second operand has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:19,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:19,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 644 of 1608 [2023-08-31 01:20:19,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:39,701 INFO L130 PetriNetUnfolder]: 67930/94369 cut-off events. [2023-08-31 01:20:39,701 INFO L131 PetriNetUnfolder]: For 786519/786519 co-relation queries the response was YES. [2023-08-31 01:20:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466426 conditions, 94369 events. 67930/94369 cut-off events. For 786519/786519 co-relation queries the response was YES. Maximal size of possible extension queue 2257. Compared 609638 event pairs, 6942 based on Foata normal form. 104/83461 useless extension candidates. Maximal degree in co-relation 466358. Up to 49209 conditions per place. [2023-08-31 01:20:41,321 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 644 selfloop transitions, 92 changer transitions 49/785 dead transitions. [2023-08-31 01:20:41,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 785 transitions, 9791 flow [2023-08-31 01:20:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:20:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:20:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5334 transitions. [2023-08-31 01:20:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146455223880597 [2023-08-31 01:20:41,325 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5334 transitions. [2023-08-31 01:20:41,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5334 transitions. [2023-08-31 01:20:41,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:41,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5334 transitions. [2023-08-31 01:20:41,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 666.75) internal successors, (5334), 8 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:41,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:41,339 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1608.0) internal successors, (14472), 9 states have internal predecessors, (14472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:41,339 INFO L175 Difference]: Start difference. First operand has 176 places, 508 transitions, 5792 flow. Second operand 8 states and 5334 transitions. [2023-08-31 01:20:41,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 785 transitions, 9791 flow [2023-08-31 01:20:47,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 785 transitions, 9400 flow, removed 136 selfloop flow, removed 8 redundant places. [2023-08-31 01:20:47,882 INFO L231 Difference]: Finished difference. Result has 171 places, 503 transitions, 5678 flow [2023-08-31 01:20:47,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=171, PETRI_TRANSITIONS=503} [2023-08-31 01:20:47,883 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2023-08-31 01:20:47,883 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 503 transitions, 5678 flow [2023-08-31 01:20:47,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 649.25) internal successors, (5194), 8 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:47,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:47,884 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:20:47,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:48,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:20:48,089 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)] === [2023-08-31 01:20:48,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash -42288596, now seen corresponding path program 3 times [2023-08-31 01:20:48,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:48,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49506500] [2023-08-31 01:20:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:20:49,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49506500] [2023-08-31 01:20:49,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49506500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934396561] [2023-08-31 01:20:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:20:49,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:49,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:20:49,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:20:49,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:20:49,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:20:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:20:50,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:20:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934396561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:20:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:20:50,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-08-31 01:20:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475232995] [2023-08-31 01:20:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:20:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:20:50,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:20:50,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:20:50,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 648 out of 1608 [2023-08-31 01:20:50,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 503 transitions, 5678 flow. Second operand has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:50,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:50,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 648 of 1608 [2023-08-31 01:20:50,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:09,973 INFO L130 PetriNetUnfolder]: 67509/93682 cut-off events. [2023-08-31 01:21:09,973 INFO L131 PetriNetUnfolder]: For 806584/806584 co-relation queries the response was YES. [2023-08-31 01:21:11,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479197 conditions, 93682 events. 67509/93682 cut-off events. For 806584/806584 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 603787 event pairs, 32241 based on Foata normal form. 52/82724 useless extension candidates. Maximal degree in co-relation 479130. Up to 90312 conditions per place. [2023-08-31 01:21:11,717 INFO L137 encePairwiseOnDemand]: 1603/1608 looper letters, 538 selfloop transitions, 35 changer transitions 40/613 dead transitions. [2023-08-31 01:21:11,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 613 transitions, 7731 flow [2023-08-31 01:21:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:21:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:21:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3350 transitions. [2023-08-31 01:21:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-31 01:21:11,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3350 transitions. [2023-08-31 01:21:11,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3350 transitions. [2023-08-31 01:21:11,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:11,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3350 transitions. [2023-08-31 01:21:11,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:11,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:11,726 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:11,726 INFO L175 Difference]: Start difference. First operand has 171 places, 503 transitions, 5678 flow. Second operand 5 states and 3350 transitions. [2023-08-31 01:21:11,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 613 transitions, 7731 flow [2023-08-31 01:21:16,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 613 transitions, 7684 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-31 01:21:16,971 INFO L231 Difference]: Finished difference. Result has 174 places, 501 transitions, 5674 flow [2023-08-31 01:21:16,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5635, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5674, PETRI_PLACES=174, PETRI_TRANSITIONS=501} [2023-08-31 01:21:16,972 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2023-08-31 01:21:16,972 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 501 transitions, 5674 flow [2023-08-31 01:21:16,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:16,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:16,973 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:21:16,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:21:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:17,177 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:21:17,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1646277518, now seen corresponding path program 1 times [2023-08-31 01:21:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:17,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108863703] [2023-08-31 01:21:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:21:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108863703] [2023-08-31 01:21:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108863703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:21:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912921719] [2023-08-31 01:21:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:21:17,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:21:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:21:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:21:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:21:18,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-31 01:21:18,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912921719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:18,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-31 01:21:18,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315796313] [2023-08-31 01:21:18,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:18,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:21:18,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:21:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:21:18,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 645 out of 1608 [2023-08-31 01:21:18,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 501 transitions, 5674 flow. Second operand has 11 states, 11 states have (on average 651.0909090909091) internal successors, (7162), 11 states have internal predecessors, (7162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:18,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:18,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 645 of 1608 [2023-08-31 01:21:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:40,022 INFO L130 PetriNetUnfolder]: 70298/98103 cut-off events. [2023-08-31 01:21:40,022 INFO L131 PetriNetUnfolder]: For 833376/833376 co-relation queries the response was YES. [2023-08-31 01:21:41,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498941 conditions, 98103 events. 70298/98103 cut-off events. For 833376/833376 co-relation queries the response was YES. Maximal size of possible extension queue 2371. Compared 643572 event pairs, 13419 based on Foata normal form. 47/86872 useless extension candidates. Maximal degree in co-relation 498873. Up to 47842 conditions per place. [2023-08-31 01:21:41,644 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 719 selfloop transitions, 78 changer transitions 44/841 dead transitions. [2023-08-31 01:21:41,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 841 transitions, 10289 flow [2023-08-31 01:21:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:21:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:21:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6010 transitions. [2023-08-31 01:21:41,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152846876727474 [2023-08-31 01:21:41,649 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6010 transitions. [2023-08-31 01:21:41,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6010 transitions. [2023-08-31 01:21:41,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:41,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6010 transitions. [2023-08-31 01:21:41,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 667.7777777777778) internal successors, (6010), 9 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1608.0) internal successors, (16080), 10 states have internal predecessors, (16080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,659 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1608.0) internal successors, (16080), 10 states have internal predecessors, (16080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:41,659 INFO L175 Difference]: Start difference. First operand has 174 places, 501 transitions, 5674 flow. Second operand 9 states and 6010 transitions. [2023-08-31 01:21:41,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 841 transitions, 10289 flow [2023-08-31 01:21:48,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 841 transitions, 10183 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-31 01:21:48,203 INFO L231 Difference]: Finished difference. Result has 181 places, 494 transitions, 5814 flow [2023-08-31 01:21:48,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=5495, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5814, PETRI_PLACES=181, PETRI_TRANSITIONS=494} [2023-08-31 01:21:48,203 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2023-08-31 01:21:48,204 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 494 transitions, 5814 flow [2023-08-31 01:21:48,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 651.0909090909091) internal successors, (7162), 11 states have internal predecessors, (7162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:48,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:48,205 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-31 01:21:48,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:21:48,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:48,409 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:21:48,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash 74568244, now seen corresponding path program 2 times [2023-08-31 01:21:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:48,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717761337] [2023-08-31 01:21:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-31 01:21:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:48,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717761337] [2023-08-31 01:21:48,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717761337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:21:48,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:21:48,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:21:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257176913] [2023-08-31 01:21:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:21:48,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:21:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:21:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:21:48,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 645 out of 1608 [2023-08-31 01:21:48,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 494 transitions, 5814 flow. Second operand has 5 states, 5 states have (on average 651.2) internal successors, (3256), 5 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:48,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:48,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 645 of 1608 [2023-08-31 01:21:48,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:09,623 INFO L130 PetriNetUnfolder]: 69974/97560 cut-off events. [2023-08-31 01:22:09,623 INFO L131 PetriNetUnfolder]: For 901563/901563 co-relation queries the response was YES. [2023-08-31 01:22:10,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515220 conditions, 97560 events. 69974/97560 cut-off events. For 901563/901563 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 639336 event pairs, 34078 based on Foata normal form. 1/86283 useless extension candidates. Maximal degree in co-relation 515152. Up to 94905 conditions per place. [2023-08-31 01:22:11,155 INFO L137 encePairwiseOnDemand]: 1602/1608 looper letters, 541 selfloop transitions, 33 changer transitions 17/591 dead transitions. [2023-08-31 01:22:11,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 591 transitions, 7688 flow [2023-08-31 01:22:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:22:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:22:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3316 transitions. [2023-08-31 01:22:11,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41243781094527365 [2023-08-31 01:22:11,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3316 transitions. [2023-08-31 01:22:11,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3316 transitions. [2023-08-31 01:22:11,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:11,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3316 transitions. [2023-08-31 01:22:11,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 663.2) internal successors, (3316), 5 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:11,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:11,164 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:11,164 INFO L175 Difference]: Start difference. First operand has 181 places, 494 transitions, 5814 flow. Second operand 5 states and 3316 transitions. [2023-08-31 01:22:11,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 591 transitions, 7688 flow