./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-word-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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:13:40,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:13:40,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:13:40,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:13:40,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:13:40,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:13:40,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:13:40,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:13:40,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:13:40,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:13:40,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:13:40,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:13:40,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:13:40,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:13:40,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:13:40,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:13:40,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:13:40,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:13:40,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:13:40,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:13:40,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:13:40,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:13:40,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:13:40,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:13:40,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:13:40,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:13:40,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:13:40,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:13:40,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:13:40,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:13:40,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:13:40,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:13:40,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:13:40,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:13:40,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:13:40,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:13:40,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:13:40,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:13:40,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:13:40,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:13:40,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:13:40,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:13:40,966 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:13:40,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:13:40,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:13:40,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:13:40,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:13:40,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:13:40,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:13:40,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:13:40,969 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:13:40,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:13:40,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:13:40,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:13:40,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:13:40,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:13:40,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:13:40,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:13:40,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:13:40,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:13:40,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:13:40,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:13:40,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:13:40,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:13:40,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:13:40,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:13:40,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:13:40,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:13:40,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:13:40,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:13:40,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:13:40,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:13:40,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:13:40,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:13:40,975 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:13:40,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:13:40,975 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:13:40,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:13:41,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:13:41,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:13:41,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:13:41,315 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:13:41,316 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:13:41,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 19:13:42,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:13:42,659 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:13:42,660 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-30 19:13:42,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08deb7a7b/7561e1b97bda40a38fe32481b77df8af/FLAG89facc87b [2023-08-30 19:13:42,680 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08deb7a7b/7561e1b97bda40a38fe32481b77df8af [2023-08-30 19:13:42,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:13:42,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:13:42,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:13:42,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:13:42,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:13:42,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:42,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b757dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42, skipping insertion in model container [2023-08-30 19:13:42,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:42,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:13:42,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:13:42,870 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-word-subst.wvr.c[3345,3358] [2023-08-30 19:13:42,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:13:42,892 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:13:42,933 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-word-subst.wvr.c[3345,3358] [2023-08-30 19:13:42,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:13:42,962 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:13:42,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42 WrapperNode [2023-08-30 19:13:42,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:13:42,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:13:42,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:13:42,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:13:42,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:42,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,025 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 185 [2023-08-30 19:13:43,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:13:43,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:13:43,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:13:43,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:13:43,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:13:43,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:13:43,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:13:43,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:13:43,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (1/1) ... [2023-08-30 19:13:43,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:13:43,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:13:43,129 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) [2023-08-30 19:13:43,153 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 [2023-08-30 19:13:43,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:13:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:13:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:13:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:13:43,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:13:43,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:13:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:13:43,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:13:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:13:43,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:13:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:13:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:13:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:13:43,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:13:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:13:43,173 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:13:43,337 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:13:43,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:13:43,753 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:13:43,764 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:13:43,764 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 19:13:43,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:13:43 BoogieIcfgContainer [2023-08-30 19:13:43,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:13:43,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:13:43,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:13:43,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:13:43,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:13:42" (1/3) ... [2023-08-30 19:13:43,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a2e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:13:43, skipping insertion in model container [2023-08-30 19:13:43,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:13:42" (2/3) ... [2023-08-30 19:13:43,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a2e16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:13:43, skipping insertion in model container [2023-08-30 19:13:43,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:13:43" (3/3) ... [2023-08-30 19:13:43,773 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-08-30 19:13:43,784 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:13:43,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:13:43,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:13:43,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:13:43,900 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:13:43,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 297 transitions, 618 flow [2023-08-30 19:13:44,085 INFO L130 PetriNetUnfolder]: 29/294 cut-off events. [2023-08-30 19:13:44,086 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:13:44,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 294 events. 29/294 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-30 19:13:44,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 297 transitions, 618 flow [2023-08-30 19:13:44,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 284 transitions, 586 flow [2023-08-30 19:13:44,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:13:44,130 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 284 transitions, 586 flow [2023-08-30 19:13:44,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 284 transitions, 586 flow [2023-08-30 19:13:44,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 284 transitions, 586 flow [2023-08-30 19:13:44,190 INFO L130 PetriNetUnfolder]: 29/284 cut-off events. [2023-08-30 19:13:44,191 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:13:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 284 events. 29/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-30 19:13:44,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 19:13:51,934 INFO L134 LiptonReduction]: Checked pairs total: 9778 [2023-08-30 19:13:51,934 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-30 19:13:51,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:13:51,952 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;@c2349f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:13:51,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:13:51,959 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2023-08-30 19:13:51,959 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:13:51,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:51,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:13:51,960 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)] === [2023-08-30 19:13:51,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -767736383, now seen corresponding path program 1 times [2023-08-30 19:13:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298012270] [2023-08-30 19:13:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:52,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298012270] [2023-08-30 19:13:52,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298012270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:52,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:52,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:13:52,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166088288] [2023-08-30 19:13:52,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:52,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:13:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:13:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:13:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 594 [2023-08-30 19:13:52,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:52,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:52,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 594 [2023-08-30 19:13:52,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:52,751 INFO L130 PetriNetUnfolder]: 1126/1525 cut-off events. [2023-08-30 19:13:52,751 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 19:13:52,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1525 events. 1126/1525 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5006 event pairs, 489 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 2520. Up to 1127 conditions per place. [2023-08-30 19:13:52,760 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 35 selfloop transitions, 0 changer transitions 26/61 dead transitions. [2023-08-30 19:13:52,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 275 flow [2023-08-30 19:13:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:13:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:13:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-30 19:13:52,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214365881032546 [2023-08-30 19:13:52,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-30 19:13:52,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-30 19:13:52,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:52,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-30 19:13:52,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:52,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:52,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:52,807 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 877 transitions. [2023-08-30 19:13:52,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 275 flow [2023-08-30 19:13:52,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:13:52,815 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2023-08-30 19:13:52,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-30 19:13:52,821 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 19:13:52,821 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2023-08-30 19:13:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:52,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:52,822 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] [2023-08-30 19:13:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:13:52,824 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)] === [2023-08-30 19:13:52,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 232711153, now seen corresponding path program 1 times [2023-08-30 19:13:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:52,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471944166] [2023-08-30 19:13:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:52,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:53,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:53,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471944166] [2023-08-30 19:13:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471944166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564035498] [2023-08-30 19:13:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:53,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:53,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:53,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:53,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:53,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:54,042 INFO L130 PetriNetUnfolder]: 742/1039 cut-off events. [2023-08-30 19:13:54,043 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 19:13:54,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1039 events. 742/1039 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3759 event pairs, 47 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2112. Up to 750 conditions per place. [2023-08-30 19:13:54,047 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-08-30 19:13:54,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 327 flow [2023-08-30 19:13:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1383 transitions. [2023-08-30 19:13:54,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2023-08-30 19:13:54,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1383 transitions. [2023-08-30 19:13:54,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1383 transitions. [2023-08-30 19:13:54,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:54,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1383 transitions. [2023-08-30 19:13:54,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,061 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 5 states and 1383 transitions. [2023-08-30 19:13:54,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 327 flow [2023-08-30 19:13:54,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 323 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 19:13:54,063 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 91 flow [2023-08-30 19:13:54,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-30 19:13:54,064 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-30 19:13:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 91 flow [2023-08-30 19:13:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:54,066 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] [2023-08-30 19:13:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:13:54,066 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)] === [2023-08-30 19:13:54,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1633443233, now seen corresponding path program 2 times [2023-08-30 19:13:54,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:54,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749376092] [2023-08-30 19:13:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749376092] [2023-08-30 19:13:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749376092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:54,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:54,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431086861] [2023-08-30 19:13:54,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:54,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:54,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:54,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:54,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:54,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:54,936 INFO L130 PetriNetUnfolder]: 804/1161 cut-off events. [2023-08-30 19:13:54,936 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-30 19:13:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1161 events. 804/1161 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4107 event pairs, 393 based on Foata normal form. 1/929 useless extension candidates. Maximal degree in co-relation 2564. Up to 895 conditions per place. [2023-08-30 19:13:54,942 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 60 selfloop transitions, 3 changer transitions 10/73 dead transitions. [2023-08-30 19:13:54,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 333 flow [2023-08-30 19:13:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1378 transitions. [2023-08-30 19:13:54,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463973063973064 [2023-08-30 19:13:54,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1378 transitions. [2023-08-30 19:13:54,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1378 transitions. [2023-08-30 19:13:54,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:54,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1378 transitions. [2023-08-30 19:13:54,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,957 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 91 flow. Second operand 5 states and 1378 transitions. [2023-08-30 19:13:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 333 flow [2023-08-30 19:13:54,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 324 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 19:13:54,959 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2023-08-30 19:13:54,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-30 19:13:54,960 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 19:13:54,960 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2023-08-30 19:13:54,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:54,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:54,961 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] [2023-08-30 19:13:54,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:13:54,962 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)] === [2023-08-30 19:13:54,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash 335853887, now seen corresponding path program 3 times [2023-08-30 19:13:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801286228] [2023-08-30 19:13:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:55,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801286228] [2023-08-30 19:13:55,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801286228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:55,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:55,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603918186] [2023-08-30 19:13:55,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:55,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:55,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:55,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:55,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:55,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:55,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:55,906 INFO L130 PetriNetUnfolder]: 884/1293 cut-off events. [2023-08-30 19:13:55,906 INFO L131 PetriNetUnfolder]: For 758/758 co-relation queries the response was YES. [2023-08-30 19:13:55,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1293 events. 884/1293 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5286 event pairs, 77 based on Foata normal form. 1/1033 useless extension candidates. Maximal degree in co-relation 3033. Up to 904 conditions per place. [2023-08-30 19:13:55,913 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 67 selfloop transitions, 3 changer transitions 11/81 dead transitions. [2023-08-30 19:13:55,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 385 flow [2023-08-30 19:13:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1385 transitions. [2023-08-30 19:13:55,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2023-08-30 19:13:55,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1385 transitions. [2023-08-30 19:13:55,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1385 transitions. [2023-08-30 19:13:55,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:55,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1385 transitions. [2023-08-30 19:13:55,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:55,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:55,931 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:55,931 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 5 states and 1385 transitions. [2023-08-30 19:13:55,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 385 flow [2023-08-30 19:13:55,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 374 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 19:13:55,936 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 123 flow [2023-08-30 19:13:55,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-30 19:13:55,938 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-08-30 19:13:55,938 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 123 flow [2023-08-30 19:13:55,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:55,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:55,939 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] [2023-08-30 19:13:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 19:13:55,940 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)] === [2023-08-30 19:13:55,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -279052683, now seen corresponding path program 4 times [2023-08-30 19:13:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896480863] [2023-08-30 19:13:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896480863] [2023-08-30 19:13:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896480863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121014564] [2023-08-30 19:13:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:56,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:56,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:56,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:56,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:56,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:57,127 INFO L130 PetriNetUnfolder]: 983/1468 cut-off events. [2023-08-30 19:13:57,128 INFO L131 PetriNetUnfolder]: For 1519/1519 co-relation queries the response was YES. [2023-08-30 19:13:57,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1468 events. 983/1468 cut-off events. For 1519/1519 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5805 event pairs, 494 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 3591. Up to 1056 conditions per place. [2023-08-30 19:13:57,136 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 63 selfloop transitions, 4 changer transitions 11/78 dead transitions. [2023-08-30 19:13:57,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 398 flow [2023-08-30 19:13:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1380 transitions. [2023-08-30 19:13:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-08-30 19:13:57,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1380 transitions. [2023-08-30 19:13:57,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1380 transitions. [2023-08-30 19:13:57,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:57,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1380 transitions. [2023-08-30 19:13:57,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:57,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:57,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:57,149 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 123 flow. Second operand 5 states and 1380 transitions. [2023-08-30 19:13:57,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 398 flow [2023-08-30 19:13:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 382 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 19:13:57,154 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 148 flow [2023-08-30 19:13:57,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-30 19:13:57,155 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-30 19:13:57,155 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 148 flow [2023-08-30 19:13:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:57,156 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] [2023-08-30 19:13:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:13:57,156 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)] === [2023-08-30 19:13:57,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash -516534259, now seen corresponding path program 5 times [2023-08-30 19:13:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777881976] [2023-08-30 19:13:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777881976] [2023-08-30 19:13:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777881976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:57,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:57,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233175505] [2023-08-30 19:13:57,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:57,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:57,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:57,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:57,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:57,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:58,182 INFO L130 PetriNetUnfolder]: 977/1448 cut-off events. [2023-08-30 19:13:58,182 INFO L131 PetriNetUnfolder]: For 2082/2082 co-relation queries the response was YES. [2023-08-30 19:13:58,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1448 events. 977/1448 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5716 event pairs, 563 based on Foata normal form. 1/1156 useless extension candidates. Maximal degree in co-relation 3666. Up to 1179 conditions per place. [2023-08-30 19:13:58,191 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 4 changer transitions 10/79 dead transitions. [2023-08-30 19:13:58,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 407 flow [2023-08-30 19:13:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1382 transitions. [2023-08-30 19:13:58,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653198653198653 [2023-08-30 19:13:58,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1382 transitions. [2023-08-30 19:13:58,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1382 transitions. [2023-08-30 19:13:58,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:58,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1382 transitions. [2023-08-30 19:13:58,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.4) internal successors, (1382), 5 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:58,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:58,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:58,204 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 148 flow. Second operand 5 states and 1382 transitions. [2023-08-30 19:13:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 407 flow [2023-08-30 19:13:58,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 391 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 19:13:58,211 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 147 flow [2023-08-30 19:13:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-30 19:13:58,213 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-30 19:13:58,214 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 147 flow [2023-08-30 19:13:58,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:58,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:58,215 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] [2023-08-30 19:13:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 19:13:58,215 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)] === [2023-08-30 19:13:58,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1858424173, now seen corresponding path program 6 times [2023-08-30 19:13:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397836094] [2023-08-30 19:13:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397836094] [2023-08-30 19:13:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397836094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:58,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:58,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:58,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394325481] [2023-08-30 19:13:58,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:13:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:13:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:13:58,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-30 19:13:58,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:58,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:58,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-30 19:13:58,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:59,099 INFO L130 PetriNetUnfolder]: 964/1423 cut-off events. [2023-08-30 19:13:59,099 INFO L131 PetriNetUnfolder]: For 1843/1843 co-relation queries the response was YES. [2023-08-30 19:13:59,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1423 events. 964/1423 cut-off events. For 1843/1843 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5442 event pairs, 494 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 3579. Up to 1056 conditions per place. [2023-08-30 19:13:59,107 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 3 changer transitions 10/83 dead transitions. [2023-08-30 19:13:59,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 420 flow [2023-08-30 19:13:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:13:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:13:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1386 transitions. [2023-08-30 19:13:59,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 19:13:59,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1386 transitions. [2023-08-30 19:13:59,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1386 transitions. [2023-08-30 19:13:59,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:59,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1386 transitions. [2023-08-30 19:13:59,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,120 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 147 flow. Second operand 5 states and 1386 transitions. [2023-08-30 19:13:59,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 420 flow [2023-08-30 19:13:59,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 409 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:13:59,126 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-08-30 19:13:59,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-30 19:13:59,126 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-30 19:13:59,127 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-08-30 19:13:59,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:59,128 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] [2023-08-30 19:13:59,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 19:13:59,128 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)] === [2023-08-30 19:13:59,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash 31607289, now seen corresponding path program 1 times [2023-08-30 19:13:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:59,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555039466] [2023-08-30 19:13:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555039466] [2023-08-30 19:13:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555039466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:59,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:59,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:59,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501228438] [2023-08-30 19:13:59,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:59,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:13:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:13:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:13:59,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-30 19:13:59,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:59,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-30 19:13:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:59,495 INFO L130 PetriNetUnfolder]: 1250/1858 cut-off events. [2023-08-30 19:13:59,496 INFO L131 PetriNetUnfolder]: For 2993/2993 co-relation queries the response was YES. [2023-08-30 19:13:59,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1858 events. 1250/1858 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8228 event pairs, 82 based on Foata normal form. 42/1511 useless extension candidates. Maximal degree in co-relation 4546. Up to 1135 conditions per place. [2023-08-30 19:13:59,506 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-30 19:13:59,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 413 flow [2023-08-30 19:13:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:13:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:13:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-08-30 19:13:59,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47853535353535354 [2023-08-30 19:13:59,510 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-08-30 19:13:59,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-08-30 19:13:59,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:59,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-08-30 19:13:59,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,517 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 4 states and 1137 transitions. [2023-08-30 19:13:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 413 flow [2023-08-30 19:13:59,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 404 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 19:13:59,521 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 199 flow [2023-08-30 19:13:59,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 19:13:59,523 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-08-30 19:13:59,523 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 199 flow [2023-08-30 19:13:59,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:59,524 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] [2023-08-30 19:13:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 19:13:59,524 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)] === [2023-08-30 19:13:59,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 330536063, now seen corresponding path program 2 times [2023-08-30 19:13:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:59,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333968576] [2023-08-30 19:13:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333968576] [2023-08-30 19:13:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333968576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:59,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632902129] [2023-08-30 19:13:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:59,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:13:59,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:13:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:13:59,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-30 19:13:59,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:13:59,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-30 19:13:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:13:59,877 INFO L130 PetriNetUnfolder]: 1145/1709 cut-off events. [2023-08-30 19:13:59,878 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-08-30 19:13:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1709 events. 1145/1709 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7373 event pairs, 61 based on Foata normal form. 42/1388 useless extension candidates. Maximal degree in co-relation 4435. Up to 1028 conditions per place. [2023-08-30 19:13:59,887 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 72 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-08-30 19:13:59,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 496 flow [2023-08-30 19:13:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:13:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:13:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-08-30 19:13:59,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47769360269360267 [2023-08-30 19:13:59,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-08-30 19:13:59,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-08-30 19:13:59,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:13:59,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-08-30 19:13:59,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,898 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,898 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 199 flow. Second operand 4 states and 1135 transitions. [2023-08-30 19:13:59,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 496 flow [2023-08-30 19:13:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 19:13:59,904 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 284 flow [2023-08-30 19:13:59,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-30 19:13:59,905 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-30 19:13:59,905 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 284 flow [2023-08-30 19:13:59,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:13:59,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:13:59,906 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] [2023-08-30 19:13:59,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 19:13:59,906 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)] === [2023-08-30 19:13:59,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:13:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1419436303, now seen corresponding path program 1 times [2023-08-30 19:13:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:13:59,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249872880] [2023-08-30 19:13:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:13:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:13:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:13:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:13:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:13:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249872880] [2023-08-30 19:13:59,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249872880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:13:59,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:13:59,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:13:59,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379410271] [2023-08-30 19:13:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:13:59,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:13:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:13:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:13:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:00,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-30 19:14:00,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:00,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-30 19:14:00,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:00,292 INFO L130 PetriNetUnfolder]: 1135/1699 cut-off events. [2023-08-30 19:14:00,293 INFO L131 PetriNetUnfolder]: For 3195/3195 co-relation queries the response was YES. [2023-08-30 19:14:00,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1699 events. 1135/1699 cut-off events. For 3195/3195 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7225 event pairs, 319 based on Foata normal form. 10/1346 useless extension candidates. Maximal degree in co-relation 4753. Up to 1145 conditions per place. [2023-08-30 19:14:00,302 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 12 changer transitions 2/82 dead transitions. [2023-08-30 19:14:00,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 556 flow [2023-08-30 19:14:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:14:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:14:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-08-30 19:14:00,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-08-30 19:14:00,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-08-30 19:14:00,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-08-30 19:14:00,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:00,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-08-30 19:14:00,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,315 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,315 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 284 flow. Second operand 5 states and 1393 transitions. [2023-08-30 19:14:00,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 556 flow [2023-08-30 19:14:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 554 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 19:14:00,321 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 360 flow [2023-08-30 19:14:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-30 19:14:00,323 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-30 19:14:00,323 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 360 flow [2023-08-30 19:14:00,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:00,324 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] [2023-08-30 19:14:00,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 19:14:00,324 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)] === [2023-08-30 19:14:00,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 55249505, now seen corresponding path program 2 times [2023-08-30 19:14:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073600766] [2023-08-30 19:14:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073600766] [2023-08-30 19:14:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073600766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:00,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82796493] [2023-08-30 19:14:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:00,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:00,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:00,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-30 19:14:00,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 360 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:00,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-30 19:14:00,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:00,683 INFO L130 PetriNetUnfolder]: 1199/1801 cut-off events. [2023-08-30 19:14:00,683 INFO L131 PetriNetUnfolder]: For 4165/4165 co-relation queries the response was YES. [2023-08-30 19:14:00,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 1801 events. 1199/1801 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7972 event pairs, 220 based on Foata normal form. 16/1428 useless extension candidates. Maximal degree in co-relation 5147. Up to 1459 conditions per place. [2023-08-30 19:14:00,695 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 64 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-30 19:14:00,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 566 flow [2023-08-30 19:14:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:14:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:14:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1129 transitions. [2023-08-30 19:14:00,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751683501683502 [2023-08-30 19:14:00,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1129 transitions. [2023-08-30 19:14:00,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1129 transitions. [2023-08-30 19:14:00,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:00,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1129 transitions. [2023-08-30 19:14:00,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,706 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 360 flow. Second operand 4 states and 1129 transitions. [2023-08-30 19:14:00,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 566 flow [2023-08-30 19:14:00,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 541 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 19:14:00,714 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 383 flow [2023-08-30 19:14:00,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-30 19:14:00,716 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-30 19:14:00,716 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 383 flow [2023-08-30 19:14:00,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:00,717 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] [2023-08-30 19:14:00,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 19:14:00,717 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)] === [2023-08-30 19:14:00,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash -482211297, now seen corresponding path program 3 times [2023-08-30 19:14:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:00,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368789509] [2023-08-30 19:14:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:00,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368789509] [2023-08-30 19:14:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368789509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:00,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:00,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483820051] [2023-08-30 19:14:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:00,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:00,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-30 19:14:00,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:00,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:00,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-30 19:14:00,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:01,080 INFO L130 PetriNetUnfolder]: 1128/1686 cut-off events. [2023-08-30 19:14:01,081 INFO L131 PetriNetUnfolder]: For 4559/4559 co-relation queries the response was YES. [2023-08-30 19:14:01,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4950 conditions, 1686 events. 1128/1686 cut-off events. For 4559/4559 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7189 event pairs, 283 based on Foata normal form. 8/1331 useless extension candidates. Maximal degree in co-relation 4931. Up to 1318 conditions per place. [2023-08-30 19:14:01,093 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 73 selfloop transitions, 11 changer transitions 1/85 dead transitions. [2023-08-30 19:14:01,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 652 flow [2023-08-30 19:14:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:14:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:14:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-08-30 19:14:01,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-08-30 19:14:01,097 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-08-30 19:14:01,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-08-30 19:14:01,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:01,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-08-30 19:14:01,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,105 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 383 flow. Second operand 5 states and 1393 transitions. [2023-08-30 19:14:01,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 652 flow [2023-08-30 19:14:01,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 642 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 19:14:01,115 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 403 flow [2023-08-30 19:14:01,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-08-30 19:14:01,117 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-08-30 19:14:01,117 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 403 flow [2023-08-30 19:14:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:01,118 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] [2023-08-30 19:14:01,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 19:14:01,118 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)] === [2023-08-30 19:14:01,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1330484071, now seen corresponding path program 4 times [2023-08-30 19:14:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:01,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567203806] [2023-08-30 19:14:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:01,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567203806] [2023-08-30 19:14:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567203806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:01,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:01,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598753540] [2023-08-30 19:14:01,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:01,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-30 19:14:01,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:01,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-30 19:14:01,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:01,491 INFO L130 PetriNetUnfolder]: 1126/1690 cut-off events. [2023-08-30 19:14:01,492 INFO L131 PetriNetUnfolder]: For 5489/5489 co-relation queries the response was YES. [2023-08-30 19:14:01,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 1690 events. 1126/1690 cut-off events. For 5489/5489 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7250 event pairs, 240 based on Foata normal form. 14/1337 useless extension candidates. Maximal degree in co-relation 4975. Up to 1444 conditions per place. [2023-08-30 19:14:01,502 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 7 changer transitions 9/84 dead transitions. [2023-08-30 19:14:01,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 650 flow [2023-08-30 19:14:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:14:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:14:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1125 transitions. [2023-08-30 19:14:01,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2023-08-30 19:14:01,506 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1125 transitions. [2023-08-30 19:14:01,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1125 transitions. [2023-08-30 19:14:01,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:01,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1125 transitions. [2023-08-30 19:14:01,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,512 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,513 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 403 flow. Second operand 4 states and 1125 transitions. [2023-08-30 19:14:01,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 650 flow [2023-08-30 19:14:01,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 616 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 19:14:01,529 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 364 flow [2023-08-30 19:14:01,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-30 19:14:01,530 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-08-30 19:14:01,530 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 364 flow [2023-08-30 19:14:01,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:01,531 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] [2023-08-30 19:14:01,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 19:14:01,531 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)] === [2023-08-30 19:14:01,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1564960603, now seen corresponding path program 3 times [2023-08-30 19:14:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354648262] [2023-08-30 19:14:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:01,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354648262] [2023-08-30 19:14:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354648262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320414748] [2023-08-30 19:14:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:01,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-30 19:14:01,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:01,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-30 19:14:01,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:01,862 INFO L130 PetriNetUnfolder]: 973/1441 cut-off events. [2023-08-30 19:14:01,862 INFO L131 PetriNetUnfolder]: For 3305/3305 co-relation queries the response was YES. [2023-08-30 19:14:01,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1441 events. 973/1441 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5650 event pairs, 444 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4198. Up to 1130 conditions per place. [2023-08-30 19:14:01,870 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 85 selfloop transitions, 5 changer transitions 4/94 dead transitions. [2023-08-30 19:14:01,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 642 flow [2023-08-30 19:14:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:14:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:14:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1407 transitions. [2023-08-30 19:14:01,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47373737373737373 [2023-08-30 19:14:01,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1407 transitions. [2023-08-30 19:14:01,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1407 transitions. [2023-08-30 19:14:01,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:01,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1407 transitions. [2023-08-30 19:14:01,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.4) internal successors, (1407), 5 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,896 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 364 flow. Second operand 5 states and 1407 transitions. [2023-08-30 19:14:01,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 642 flow [2023-08-30 19:14:01,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 612 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 19:14:01,902 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 316 flow [2023-08-30 19:14:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-30 19:14:01,903 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-08-30 19:14:01,903 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 316 flow [2023-08-30 19:14:01,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:01,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:01,904 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] [2023-08-30 19:14:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 19:14:01,906 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)] === [2023-08-30 19:14:01,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash -831405779, now seen corresponding path program 4 times [2023-08-30 19:14:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:01,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435020948] [2023-08-30 19:14:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:01,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:01,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435020948] [2023-08-30 19:14:01,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435020948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:01,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:01,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:01,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148814060] [2023-08-30 19:14:01,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:01,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:01,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-30 19:14:02,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:02,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-30 19:14:02,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:02,210 INFO L130 PetriNetUnfolder]: 913/1335 cut-off events. [2023-08-30 19:14:02,210 INFO L131 PetriNetUnfolder]: For 2218/2218 co-relation queries the response was YES. [2023-08-30 19:14:02,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 1335 events. 913/1335 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5122 event pairs, 191 based on Foata normal form. 16/1054 useless extension candidates. Maximal degree in co-relation 3817. Up to 1209 conditions per place. [2023-08-30 19:14:02,218 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 56 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2023-08-30 19:14:02,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 464 flow [2023-08-30 19:14:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:14:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:14:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-08-30 19:14:02,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718013468013468 [2023-08-30 19:14:02,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-08-30 19:14:02,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-08-30 19:14:02,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:02,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-08-30 19:14:02,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,228 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,228 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 316 flow. Second operand 4 states and 1121 transitions. [2023-08-30 19:14:02,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 464 flow [2023-08-30 19:14:02,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 439 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 19:14:02,231 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 292 flow [2023-08-30 19:14:02,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 19:14:02,232 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-08-30 19:14:02,232 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 292 flow [2023-08-30 19:14:02,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:02,233 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] [2023-08-30 19:14:02,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 19:14:02,233 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)] === [2023-08-30 19:14:02,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash -262667675, now seen corresponding path program 5 times [2023-08-30 19:14:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:02,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700565677] [2023-08-30 19:14:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:02,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:02,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700565677] [2023-08-30 19:14:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700565677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:02,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713319626] [2023-08-30 19:14:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:02,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-30 19:14:02,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:02,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-30 19:14:02,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:02,509 INFO L130 PetriNetUnfolder]: 883/1283 cut-off events. [2023-08-30 19:14:02,509 INFO L131 PetriNetUnfolder]: For 1307/1307 co-relation queries the response was YES. [2023-08-30 19:14:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1283 events. 883/1283 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4715 event pairs, 497 based on Foata normal form. 4/1004 useless extension candidates. Maximal degree in co-relation 3679. Up to 1269 conditions per place. [2023-08-30 19:14:02,515 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 47 selfloop transitions, 0 changer transitions 8/55 dead transitions. [2023-08-30 19:14:02,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 398 flow [2023-08-30 19:14:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:14:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:14:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1103 transitions. [2023-08-30 19:14:02,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642255892255892 [2023-08-30 19:14:02,518 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1103 transitions. [2023-08-30 19:14:02,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1103 transitions. [2023-08-30 19:14:02,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:02,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1103 transitions. [2023-08-30 19:14:02,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.75) internal successors, (1103), 4 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,525 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 292 flow. Second operand 4 states and 1103 transitions. [2023-08-30 19:14:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 398 flow [2023-08-30 19:14:02,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 377 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 19:14:02,527 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 235 flow [2023-08-30 19:14:02,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-08-30 19:14:02,529 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-08-30 19:14:02,529 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 235 flow [2023-08-30 19:14:02,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:02,529 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] [2023-08-30 19:14:02,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 19:14:02,530 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)] === [2023-08-30 19:14:02,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:02,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1310580011, now seen corresponding path program 5 times [2023-08-30 19:14:02,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371701014] [2023-08-30 19:14:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:02,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371701014] [2023-08-30 19:14:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371701014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:02,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:14:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291885375] [2023-08-30 19:14:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:14:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:14:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:14:02,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-30 19:14:02,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:02,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-30 19:14:02,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:02,782 INFO L130 PetriNetUnfolder]: 803/1151 cut-off events. [2023-08-30 19:14:02,782 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2023-08-30 19:14:02,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1151 events. 803/1151 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3967 event pairs, 444 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 3204. Up to 1130 conditions per place. [2023-08-30 19:14:02,788 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 44 selfloop transitions, 0 changer transitions 10/54 dead transitions. [2023-08-30 19:14:02,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 344 flow [2023-08-30 19:14:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:14:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:14:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1104 transitions. [2023-08-30 19:14:02,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-08-30 19:14:02,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1104 transitions. [2023-08-30 19:14:02,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1104 transitions. [2023-08-30 19:14:02,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:02,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1104 transitions. [2023-08-30 19:14:02,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,797 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,797 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 235 flow. Second operand 4 states and 1104 transitions. [2023-08-30 19:14:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 344 flow [2023-08-30 19:14:02,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 341 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 19:14:02,799 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-08-30 19:14:02,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-30 19:14:02,800 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-30 19:14:02,800 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-08-30 19:14:02,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:02,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:02,801 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] [2023-08-30 19:14:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 19:14:02,801 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)] === [2023-08-30 19:14:02,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1757760381, now seen corresponding path program 1 times [2023-08-30 19:14:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:02,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929335201] [2023-08-30 19:14:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:03,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:03,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929335201] [2023-08-30 19:14:03,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929335201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:03,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:14:03,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 19:14:03,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670270651] [2023-08-30 19:14:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:03,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:14:03,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:14:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:14:03,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 594 [2023-08-30 19:14:03,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:03,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:03,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 594 [2023-08-30 19:14:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:04,638 INFO L130 PetriNetUnfolder]: 3096/4436 cut-off events. [2023-08-30 19:14:04,638 INFO L131 PetriNetUnfolder]: For 3284/3284 co-relation queries the response was YES. [2023-08-30 19:14:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 4436 events. 3096/4436 cut-off events. For 3284/3284 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20444 event pairs, 1032 based on Foata normal form. 1/3506 useless extension candidates. Maximal degree in co-relation 12384. Up to 693 conditions per place. [2023-08-30 19:14:04,658 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 219 selfloop transitions, 28 changer transitions 7/254 dead transitions. [2023-08-30 19:14:04,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 254 transitions, 1636 flow [2023-08-30 19:14:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:14:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:14:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2666 transitions. [2023-08-30 19:14:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44882154882154884 [2023-08-30 19:14:04,665 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2666 transitions. [2023-08-30 19:14:04,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2666 transitions. [2023-08-30 19:14:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:04,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2666 transitions. [2023-08-30 19:14:04,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 266.6) internal successors, (2666), 10 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:04,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:04,682 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:04,682 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 10 states and 2666 transitions. [2023-08-30 19:14:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 254 transitions, 1636 flow [2023-08-30 19:14:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 254 transitions, 1622 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 19:14:04,688 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 421 flow [2023-08-30 19:14:04,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=421, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-30 19:14:04,688 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-08-30 19:14:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 421 flow [2023-08-30 19:14:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:04,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:04,689 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, 1] [2023-08-30 19:14:04,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 19:14:04,690 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)] === [2023-08-30 19:14:04,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash -493399717, now seen corresponding path program 1 times [2023-08-30 19:14:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:04,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149216970] [2023-08-30 19:14:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:04,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149216970] [2023-08-30 19:14:04,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149216970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143779577] [2023-08-30 19:14:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:04,885 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) [2023-08-30 19:14:04,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:14:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 19:14:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:05,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:14:06,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:14:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:14:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143779577] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:08,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:14:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-30 19:14:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200113511] [2023-08-30 19:14:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:14:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:14:08,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:14:09,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:14:09,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:09,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:09,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:14:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:13,085 INFO L130 PetriNetUnfolder]: 6090/8974 cut-off events. [2023-08-30 19:14:13,085 INFO L131 PetriNetUnfolder]: For 10029/10029 co-relation queries the response was YES. [2023-08-30 19:14:13,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28590 conditions, 8974 events. 6090/8974 cut-off events. For 10029/10029 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50237 event pairs, 600 based on Foata normal form. 4/8079 useless extension candidates. Maximal degree in co-relation 28574. Up to 1372 conditions per place. [2023-08-30 19:14:13,140 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 380 selfloop transitions, 101 changer transitions 27/508 dead transitions. [2023-08-30 19:14:13,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 508 transitions, 3487 flow [2023-08-30 19:14:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:14:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:14:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5322 transitions. [2023-08-30 19:14:13,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725436179981633 [2023-08-30 19:14:13,152 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5322 transitions. [2023-08-30 19:14:13,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5322 transitions. [2023-08-30 19:14:13,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:13,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5322 transitions. [2023-08-30 19:14:13,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 241.9090909090909) internal successors, (5322), 22 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:13,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:13,179 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:13,179 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 421 flow. Second operand 22 states and 5322 transitions. [2023-08-30 19:14:13,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 508 transitions, 3487 flow [2023-08-30 19:14:13,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 508 transitions, 3485 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 19:14:13,199 INFO L231 Difference]: Finished difference. Result has 105 places, 173 transitions, 1537 flow [2023-08-30 19:14:13,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1537, PETRI_PLACES=105, PETRI_TRANSITIONS=173} [2023-08-30 19:14:13,200 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2023-08-30 19:14:13,200 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 173 transitions, 1537 flow [2023-08-30 19:14:13,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:13,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:13,202 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, 1] [2023-08-30 19:14:13,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:13,410 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)] === [2023-08-30 19:14:13,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash 773516305, now seen corresponding path program 2 times [2023-08-30 19:14:13,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:13,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733567704] [2023-08-30 19:14:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:13,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733567704] [2023-08-30 19:14:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733567704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:13,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409659296] [2023-08-30 19:14:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:14:13,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:13,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:13,620 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) [2023-08-30 19:14:13,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:14:13,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:14:13,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:14:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 19:14:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:14,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:14:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409659296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:14,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:14:14,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:14:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691893025] [2023-08-30 19:14:14,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:14,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:14:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:14:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:14:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:14:14,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 173 transitions, 1537 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:14,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:14,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:14:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:16,608 INFO L130 PetriNetUnfolder]: 6398/9419 cut-off events. [2023-08-30 19:14:16,608 INFO L131 PetriNetUnfolder]: For 39822/39822 co-relation queries the response was YES. [2023-08-30 19:14:16,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 9419 events. 6398/9419 cut-off events. For 39822/39822 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52722 event pairs, 912 based on Foata normal form. 49/8974 useless extension candidates. Maximal degree in co-relation 39955. Up to 3793 conditions per place. [2023-08-30 19:14:16,677 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 238 selfloop transitions, 124 changer transitions 10/372 dead transitions. [2023-08-30 19:14:16,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 372 transitions, 3591 flow [2023-08-30 19:14:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:14:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:14:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4004 transitions. [2023-08-30 19:14:16,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2023-08-30 19:14:16,683 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4004 transitions. [2023-08-30 19:14:16,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4004 transitions. [2023-08-30 19:14:16,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:16,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4004 transitions. [2023-08-30 19:14:16,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 250.25) internal successors, (4004), 16 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:16,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:16,701 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:16,702 INFO L175 Difference]: Start difference. First operand has 105 places, 173 transitions, 1537 flow. Second operand 16 states and 4004 transitions. [2023-08-30 19:14:16,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 372 transitions, 3591 flow [2023-08-30 19:14:16,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 372 transitions, 3511 flow, removed 40 selfloop flow, removed 0 redundant places. [2023-08-30 19:14:16,881 INFO L231 Difference]: Finished difference. Result has 129 places, 220 transitions, 2423 flow [2023-08-30 19:14:16,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2423, PETRI_PLACES=129, PETRI_TRANSITIONS=220} [2023-08-30 19:14:16,882 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-08-30 19:14:16,882 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 220 transitions, 2423 flow [2023-08-30 19:14:16,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:16,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:16,883 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, 1] [2023-08-30 19:14:16,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:17,089 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,SelfDestructingSolverStorable19 [2023-08-30 19:14:17,089 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)] === [2023-08-30 19:14:17,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1430753600, now seen corresponding path program 1 times [2023-08-30 19:14:17,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:17,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035941602] [2023-08-30 19:14:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035941602] [2023-08-30 19:14:17,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035941602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536435890] [2023-08-30 19:14:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:17,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:17,358 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) [2023-08-30 19:14:17,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:14:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:17,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 19:14:17,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:17,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:14:17,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:14:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:18,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:14:18,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:14:18,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:14:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536435890] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:20,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:14:20,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-30 19:14:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299678114] [2023-08-30 19:14:20,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:14:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:14:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:14:21,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:14:21,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 220 transitions, 2423 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:21,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:21,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:14:21,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:25,238 INFO L130 PetriNetUnfolder]: 9862/14530 cut-off events. [2023-08-30 19:14:25,239 INFO L131 PetriNetUnfolder]: For 86655/86655 co-relation queries the response was YES. [2023-08-30 19:14:25,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67775 conditions, 14530 events. 9862/14530 cut-off events. For 86655/86655 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 87462 event pairs, 613 based on Foata normal form. 5/13765 useless extension candidates. Maximal degree in co-relation 67732. Up to 3294 conditions per place. [2023-08-30 19:14:25,343 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 297 selfloop transitions, 214 changer transitions 16/527 dead transitions. [2023-08-30 19:14:25,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 527 transitions, 5996 flow [2023-08-30 19:14:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:14:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:14:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3630 transitions. [2023-08-30 19:14:25,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-30 19:14:25,349 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3630 transitions. [2023-08-30 19:14:25,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3630 transitions. [2023-08-30 19:14:25,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:25,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3630 transitions. [2023-08-30 19:14:25,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 242.0) internal successors, (3630), 15 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:25,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:25,362 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:25,362 INFO L175 Difference]: Start difference. First operand has 129 places, 220 transitions, 2423 flow. Second operand 15 states and 3630 transitions. [2023-08-30 19:14:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 527 transitions, 5996 flow [2023-08-30 19:14:25,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 527 transitions, 5296 flow, removed 274 selfloop flow, removed 8 redundant places. [2023-08-30 19:14:25,960 INFO L231 Difference]: Finished difference. Result has 146 places, 316 transitions, 3915 flow [2023-08-30 19:14:25,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3915, PETRI_PLACES=146, PETRI_TRANSITIONS=316} [2023-08-30 19:14:25,961 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-08-30 19:14:25,961 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 316 transitions, 3915 flow [2023-08-30 19:14:25,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:25,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:25,962 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, 1] [2023-08-30 19:14:25,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:26,168 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:14:26,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1629821531, now seen corresponding path program 3 times [2023-08-30 19:14:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103600954] [2023-08-30 19:14:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:26,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:26,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103600954] [2023-08-30 19:14:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103600954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611219345] [2023-08-30 19:14:26,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:14:26,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:26,354 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) [2023-08-30 19:14:26,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:14:26,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:14:26,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:14:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:14:26,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:27,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:14:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611219345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:27,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:14:27,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:14:27,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876641535] [2023-08-30 19:14:27,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:27,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:14:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:14:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:14:27,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-08-30 19:14:27,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 316 transitions, 3915 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:27,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:27,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-08-30 19:14:27,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:29,970 INFO L130 PetriNetUnfolder]: 9888/14677 cut-off events. [2023-08-30 19:14:29,970 INFO L131 PetriNetUnfolder]: For 112504/112504 co-relation queries the response was YES. [2023-08-30 19:14:30,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71383 conditions, 14677 events. 9888/14677 cut-off events. For 112504/112504 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 89023 event pairs, 1511 based on Foata normal form. 52/13927 useless extension candidates. Maximal degree in co-relation 71333. Up to 6687 conditions per place. [2023-08-30 19:14:30,087 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 254 selfloop transitions, 203 changer transitions 15/472 dead transitions. [2023-08-30 19:14:30,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 472 transitions, 6115 flow [2023-08-30 19:14:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:14:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:14:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3509 transitions. [2023-08-30 19:14:30,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421957671957672 [2023-08-30 19:14:30,093 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3509 transitions. [2023-08-30 19:14:30,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3509 transitions. [2023-08-30 19:14:30,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:30,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3509 transitions. [2023-08-30 19:14:30,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 250.64285714285714) internal successors, (3509), 14 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:30,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:30,108 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:30,109 INFO L175 Difference]: Start difference. First operand has 146 places, 316 transitions, 3915 flow. Second operand 14 states and 3509 transitions. [2023-08-30 19:14:30,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 472 transitions, 6115 flow [2023-08-30 19:14:31,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 472 transitions, 5957 flow, removed 79 selfloop flow, removed 0 redundant places. [2023-08-30 19:14:31,158 INFO L231 Difference]: Finished difference. Result has 167 places, 350 transitions, 4907 flow [2023-08-30 19:14:31,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4907, PETRI_PLACES=167, PETRI_TRANSITIONS=350} [2023-08-30 19:14:31,159 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 129 predicate places. [2023-08-30 19:14:31,159 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 350 transitions, 4907 flow [2023-08-30 19:14:31,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:31,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:31,160 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, 1] [2023-08-30 19:14:31,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:31,366 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:14:31,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1609186473, now seen corresponding path program 1 times [2023-08-30 19:14:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:31,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411433921] [2023-08-30 19:14:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:31,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:31,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411433921] [2023-08-30 19:14:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411433921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:31,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349422528] [2023-08-30 19:14:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:31,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:31,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:31,891 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) [2023-08-30 19:14:31,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:14:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 19:14:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:32,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:14:32,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:14:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:14:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349422528] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:33,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:14:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-08-30 19:14:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462529602] [2023-08-30 19:14:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:14:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:14:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:14:34,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-30 19:14:34,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 350 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:34,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:34,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-30 19:14:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:38,150 INFO L130 PetriNetUnfolder]: 13447/20065 cut-off events. [2023-08-30 19:14:38,150 INFO L131 PetriNetUnfolder]: For 177684/177684 co-relation queries the response was YES. [2023-08-30 19:14:38,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103138 conditions, 20065 events. 13447/20065 cut-off events. For 177684/177684 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 128669 event pairs, 3272 based on Foata normal form. 114/19117 useless extension candidates. Maximal degree in co-relation 103079. Up to 5325 conditions per place. [2023-08-30 19:14:38,277 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 366 selfloop transitions, 250 changer transitions 39/655 dead transitions. [2023-08-30 19:14:38,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 655 transitions, 9387 flow [2023-08-30 19:14:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:14:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:14:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3949 transitions. [2023-08-30 19:14:38,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41550925925925924 [2023-08-30 19:14:38,286 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3949 transitions. [2023-08-30 19:14:38,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3949 transitions. [2023-08-30 19:14:38,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:38,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3949 transitions. [2023-08-30 19:14:38,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 246.8125) internal successors, (3949), 16 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:38,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:38,300 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:38,300 INFO L175 Difference]: Start difference. First operand has 167 places, 350 transitions, 4907 flow. Second operand 16 states and 3949 transitions. [2023-08-30 19:14:38,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 655 transitions, 9387 flow [2023-08-30 19:14:39,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 655 transitions, 8962 flow, removed 120 selfloop flow, removed 7 redundant places. [2023-08-30 19:14:39,917 INFO L231 Difference]: Finished difference. Result has 182 places, 439 transitions, 6604 flow [2023-08-30 19:14:39,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6604, PETRI_PLACES=182, PETRI_TRANSITIONS=439} [2023-08-30 19:14:39,917 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2023-08-30 19:14:39,917 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 439 transitions, 6604 flow [2023-08-30 19:14:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:39,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:39,918 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, 1] [2023-08-30 19:14:39,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:40,119 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,SelfDestructingSolverStorable22 [2023-08-30 19:14:40,120 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:14:40,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1006698783, now seen corresponding path program 2 times [2023-08-30 19:14:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727007712] [2023-08-30 19:14:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:40,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727007712] [2023-08-30 19:14:40,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727007712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:40,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990978405] [2023-08-30 19:14:40,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:14:40,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:40,561 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) [2023-08-30 19:14:40,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:14:40,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:14:40,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:14:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:14:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:41,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:14:41,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990978405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:41,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:14:41,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-30 19:14:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551443232] [2023-08-30 19:14:41,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:41,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:14:41,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:41,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:14:41,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:14:41,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-08-30 19:14:41,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 439 transitions, 6604 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:41,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:41,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-08-30 19:14:41,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:44,842 INFO L130 PetriNetUnfolder]: 13377/19984 cut-off events. [2023-08-30 19:14:44,842 INFO L131 PetriNetUnfolder]: For 185888/185888 co-relation queries the response was YES. [2023-08-30 19:14:44,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105190 conditions, 19984 events. 13377/19984 cut-off events. For 185888/185888 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 128356 event pairs, 2638 based on Foata normal form. 327/19213 useless extension candidates. Maximal degree in co-relation 105125. Up to 8884 conditions per place. [2023-08-30 19:14:44,976 INFO L137 encePairwiseOnDemand]: 582/594 looper letters, 298 selfloop transitions, 284 changer transitions 20/602 dead transitions. [2023-08-30 19:14:44,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 602 transitions, 9626 flow [2023-08-30 19:14:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:14:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:14:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2311 transitions. [2023-08-30 19:14:44,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43228582117471004 [2023-08-30 19:14:44,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2311 transitions. [2023-08-30 19:14:44,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2311 transitions. [2023-08-30 19:14:44,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:44,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2311 transitions. [2023-08-30 19:14:44,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.77777777777777) internal successors, (2311), 9 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:44,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:44,986 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:44,987 INFO L175 Difference]: Start difference. First operand has 182 places, 439 transitions, 6604 flow. Second operand 9 states and 2311 transitions. [2023-08-30 19:14:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 602 transitions, 9626 flow [2023-08-30 19:14:47,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 602 transitions, 9395 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-08-30 19:14:47,332 INFO L231 Difference]: Finished difference. Result has 188 places, 484 transitions, 8077 flow [2023-08-30 19:14:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=188, PETRI_TRANSITIONS=484} [2023-08-30 19:14:47,332 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-08-30 19:14:47,332 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 484 transitions, 8077 flow [2023-08-30 19:14:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:47,333 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, 1] [2023-08-30 19:14:47,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:14:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:47,539 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:14:47,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1314180504, now seen corresponding path program 2 times [2023-08-30 19:14:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559384938] [2023-08-30 19:14:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559384938] [2023-08-30 19:14:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559384938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136925578] [2023-08-30 19:14:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:14:47,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:47,725 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) [2023-08-30 19:14:47,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:14:47,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:14:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:14:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 19:14:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:48,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:14:48,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136925578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:48,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:14:48,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:14:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360871567] [2023-08-30 19:14:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:14:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:14:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:14:48,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 594 [2023-08-30 19:14:48,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 484 transitions, 8077 flow. Second operand has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:48,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:48,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 594 [2023-08-30 19:14:48,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:14:52,812 INFO L130 PetriNetUnfolder]: 15608/22845 cut-off events. [2023-08-30 19:14:52,812 INFO L131 PetriNetUnfolder]: For 218392/218392 co-relation queries the response was YES. [2023-08-30 19:14:52,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128918 conditions, 22845 events. 15608/22845 cut-off events. For 218392/218392 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 143637 event pairs, 2781 based on Foata normal form. 14/21593 useless extension candidates. Maximal degree in co-relation 128851. Up to 12753 conditions per place. [2023-08-30 19:14:52,979 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 403 selfloop transitions, 294 changer transitions 14/711 dead transitions. [2023-08-30 19:14:52,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 711 transitions, 11946 flow [2023-08-30 19:14:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:14:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:14:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3492 transitions. [2023-08-30 19:14:52,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-08-30 19:14:52,985 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3492 transitions. [2023-08-30 19:14:52,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3492 transitions. [2023-08-30 19:14:52,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:14:52,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3492 transitions. [2023-08-30 19:14:52,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 249.42857142857142) internal successors, (3492), 14 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:52,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:52,995 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:52,996 INFO L175 Difference]: Start difference. First operand has 188 places, 484 transitions, 8077 flow. Second operand 14 states and 3492 transitions. [2023-08-30 19:14:52,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 711 transitions, 11946 flow [2023-08-30 19:14:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 711 transitions, 11287 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-30 19:14:54,936 INFO L231 Difference]: Finished difference. Result has 201 places, 558 transitions, 9468 flow [2023-08-30 19:14:54,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9468, PETRI_PLACES=201, PETRI_TRANSITIONS=558} [2023-08-30 19:14:54,937 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 163 predicate places. [2023-08-30 19:14:54,937 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 558 transitions, 9468 flow [2023-08-30 19:14:54,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:14:54,937 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, 1] [2023-08-30 19:14:54,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 19:14:55,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:55,138 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:14:55,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:14:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash 141783206, now seen corresponding path program 3 times [2023-08-30 19:14:55,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:14:55,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611566730] [2023-08-30 19:14:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:14:55,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:14:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:14:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:14:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:14:55,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611566730] [2023-08-30 19:14:55,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611566730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:14:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980259559] [2023-08-30 19:14:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:14:55,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:14:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:14:55,325 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) [2023-08-30 19:14:55,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:14:55,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:14:55,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:14:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:14:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:14:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:14:55,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:14:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980259559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:14:55,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:14:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:14:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241211619] [2023-08-30 19:14:55,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:14:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:14:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:14:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:14:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:14:56,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:14:56,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 558 transitions, 9468 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:14:56,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:14:56,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:14:56,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:00,899 INFO L130 PetriNetUnfolder]: 15712/23102 cut-off events. [2023-08-30 19:15:00,900 INFO L131 PetriNetUnfolder]: For 239582/239582 co-relation queries the response was YES. [2023-08-30 19:15:01,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130517 conditions, 23102 events. 15712/23102 cut-off events. For 239582/239582 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 146872 event pairs, 2491 based on Foata normal form. 126/21942 useless extension candidates. Maximal degree in co-relation 130446. Up to 12194 conditions per place. [2023-08-30 19:15:01,073 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 412 selfloop transitions, 329 changer transitions 10/751 dead transitions. [2023-08-30 19:15:01,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 751 transitions, 12718 flow [2023-08-30 19:15:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:15:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:15:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3756 transitions. [2023-08-30 19:15:01,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42154882154882156 [2023-08-30 19:15:01,078 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3756 transitions. [2023-08-30 19:15:01,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3756 transitions. [2023-08-30 19:15:01,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:01,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3756 transitions. [2023-08-30 19:15:01,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.4) internal successors, (3756), 15 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:01,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:01,089 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:01,090 INFO L175 Difference]: Start difference. First operand has 201 places, 558 transitions, 9468 flow. Second operand 15 states and 3756 transitions. [2023-08-30 19:15:01,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 751 transitions, 12718 flow [2023-08-30 19:15:03,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 751 transitions, 12595 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-30 19:15:03,178 INFO L231 Difference]: Finished difference. Result has 216 places, 594 transitions, 10798 flow [2023-08-30 19:15:03,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=9301, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10798, PETRI_PLACES=216, PETRI_TRANSITIONS=594} [2023-08-30 19:15:03,179 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 178 predicate places. [2023-08-30 19:15:03,179 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 594 transitions, 10798 flow [2023-08-30 19:15:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:03,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:03,179 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, 1] [2023-08-30 19:15:03,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 19:15:03,380 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,SelfDestructingSolverStorable25 [2023-08-30 19:15:03,380 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:15:03,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1833563647, now seen corresponding path program 3 times [2023-08-30 19:15:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:03,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432921496] [2023-08-30 19:15:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:03,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432921496] [2023-08-30 19:15:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432921496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285310345] [2023-08-30 19:15:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:15:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:04,038 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) [2023-08-30 19:15:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:15:04,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:15:04,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:15:04,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:15:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:15:04,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:04,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:15:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:15:04,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:15:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285310345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:15:04,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:15:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2023-08-30 19:15:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298637914] [2023-08-30 19:15:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:15:04,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:15:04,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:15:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:15:05,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 594 [2023-08-30 19:15:05,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 594 transitions, 10798 flow. Second operand has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:05,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:05,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 594 [2023-08-30 19:15:05,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:10,095 INFO L130 PetriNetUnfolder]: 16812/24689 cut-off events. [2023-08-30 19:15:10,095 INFO L131 PetriNetUnfolder]: For 315246/315246 co-relation queries the response was YES. [2023-08-30 19:15:10,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147547 conditions, 24689 events. 16812/24689 cut-off events. For 315246/315246 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 158717 event pairs, 2801 based on Foata normal form. 249/23544 useless extension candidates. Maximal degree in co-relation 147471. Up to 15629 conditions per place. [2023-08-30 19:15:10,326 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 474 selfloop transitions, 366 changer transitions 14/854 dead transitions. [2023-08-30 19:15:10,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 854 transitions, 15237 flow [2023-08-30 19:15:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 19:15:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 19:15:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5039 transitions. [2023-08-30 19:15:10,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241582491582492 [2023-08-30 19:15:10,333 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5039 transitions. [2023-08-30 19:15:10,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5039 transitions. [2023-08-30 19:15:10,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:10,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5039 transitions. [2023-08-30 19:15:10,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 251.95) internal successors, (5039), 20 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:10,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:10,350 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:10,350 INFO L175 Difference]: Start difference. First operand has 216 places, 594 transitions, 10798 flow. Second operand 20 states and 5039 transitions. [2023-08-30 19:15:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 854 transitions, 15237 flow [2023-08-30 19:15:13,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 854 transitions, 14881 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-08-30 19:15:13,201 INFO L231 Difference]: Finished difference. Result has 240 places, 695 transitions, 13614 flow [2023-08-30 19:15:13,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13614, PETRI_PLACES=240, PETRI_TRANSITIONS=695} [2023-08-30 19:15:13,202 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 202 predicate places. [2023-08-30 19:15:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 695 transitions, 13614 flow [2023-08-30 19:15:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:13,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:13,203 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, 1] [2023-08-30 19:15:13,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:15:13,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 19:15:13,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:15:13,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1459391252, now seen corresponding path program 4 times [2023-08-30 19:15:13,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:13,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595867024] [2023-08-30 19:15:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595867024] [2023-08-30 19:15:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595867024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896031597] [2023-08-30 19:15:13,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:15:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:13,589 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) [2023-08-30 19:15:13,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:15:13,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:15:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:15:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 19:15:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:15:14,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:14,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:15:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:14,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:15:14,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:14,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:15:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:15:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896031597] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:15,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:15:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-30 19:15:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998756777] [2023-08-30 19:15:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:15:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:15:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:15:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:15:16,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:15:16,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 695 transitions, 13614 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:16,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:16,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:15:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:24,475 INFO L130 PetriNetUnfolder]: 22729/33687 cut-off events. [2023-08-30 19:15:24,475 INFO L131 PetriNetUnfolder]: For 578241/578241 co-relation queries the response was YES. [2023-08-30 19:15:24,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225149 conditions, 33687 events. 22729/33687 cut-off events. For 578241/578241 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 231917 event pairs, 1601 based on Foata normal form. 19/31800 useless extension candidates. Maximal degree in co-relation 225062. Up to 9833 conditions per place. [2023-08-30 19:15:24,889 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 647 selfloop transitions, 421 changer transitions 29/1097 dead transitions. [2023-08-30 19:15:24,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1097 transitions, 21307 flow [2023-08-30 19:15:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:15:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:15:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3383 transitions. [2023-08-30 19:15:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068061568061568 [2023-08-30 19:15:24,893 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3383 transitions. [2023-08-30 19:15:24,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3383 transitions. [2023-08-30 19:15:24,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:24,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3383 transitions. [2023-08-30 19:15:24,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 241.64285714285714) internal successors, (3383), 14 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:24,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:24,904 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:24,904 INFO L175 Difference]: Start difference. First operand has 240 places, 695 transitions, 13614 flow. Second operand 14 states and 3383 transitions. [2023-08-30 19:15:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1097 transitions, 21307 flow [2023-08-30 19:15:31,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1097 transitions, 20587 flow, removed 67 selfloop flow, removed 6 redundant places. [2023-08-30 19:15:31,360 INFO L231 Difference]: Finished difference. Result has 253 places, 804 transitions, 16593 flow [2023-08-30 19:15:31,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16593, PETRI_PLACES=253, PETRI_TRANSITIONS=804} [2023-08-30 19:15:31,361 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-08-30 19:15:31,361 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 804 transitions, 16593 flow [2023-08-30 19:15:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:31,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:31,362 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, 1] [2023-08-30 19:15:31,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:15:31,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 19:15:31,566 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:15:31,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1550042883, now seen corresponding path program 4 times [2023-08-30 19:15:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:31,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220747669] [2023-08-30 19:15:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:31,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:31,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:31,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220747669] [2023-08-30 19:15:31,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220747669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:31,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354350296] [2023-08-30 19:15:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:15:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:31,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:15:31,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:15:31,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:15:31,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:15:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 19:15:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:15:32,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:32,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 78 [2023-08-30 19:15:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:15:32,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:32,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:15:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:15:33,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354350296] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:33,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:15:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-30 19:15:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043737744] [2023-08-30 19:15:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:15:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:15:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:15:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:15:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:15:33,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 804 transitions, 16593 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:33,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:33,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:15:33,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:15:41,672 INFO L130 PetriNetUnfolder]: 22650/33576 cut-off events. [2023-08-30 19:15:41,672 INFO L131 PetriNetUnfolder]: For 730957/730957 co-relation queries the response was YES. [2023-08-30 19:15:42,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233740 conditions, 33576 events. 22650/33576 cut-off events. For 730957/730957 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 230581 event pairs, 2937 based on Foata normal form. 2/31672 useless extension candidates. Maximal degree in co-relation 233648. Up to 13072 conditions per place. [2023-08-30 19:15:42,238 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 575 selfloop transitions, 431 changer transitions 9/1015 dead transitions. [2023-08-30 19:15:42,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1015 transitions, 21100 flow [2023-08-30 19:15:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:15:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:15:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3142 transitions. [2023-08-30 19:15:42,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068894068894069 [2023-08-30 19:15:42,241 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3142 transitions. [2023-08-30 19:15:42,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3142 transitions. [2023-08-30 19:15:42,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:15:42,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3142 transitions. [2023-08-30 19:15:42,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.69230769230768) internal successors, (3142), 13 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:42,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:42,251 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:42,251 INFO L175 Difference]: Start difference. First operand has 253 places, 804 transitions, 16593 flow. Second operand 13 states and 3142 transitions. [2023-08-30 19:15:42,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1015 transitions, 21100 flow [2023-08-30 19:15:52,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1015 transitions, 20699 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-08-30 19:15:52,183 INFO L231 Difference]: Finished difference. Result has 260 places, 808 transitions, 17294 flow [2023-08-30 19:15:52,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16309, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17294, PETRI_PLACES=260, PETRI_TRANSITIONS=808} [2023-08-30 19:15:52,184 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-30 19:15:52,185 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 808 transitions, 17294 flow [2023-08-30 19:15:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:52,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:15:52,185 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, 1] [2023-08-30 19:15:52,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 19:15:52,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:15:52,387 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:15:52,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:15:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash 749821040, now seen corresponding path program 5 times [2023-08-30 19:15:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:15:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772629769] [2023-08-30 19:15:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:15:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:15:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:15:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:15:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772629769] [2023-08-30 19:15:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772629769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6383865] [2023-08-30 19:15:52,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:15:52,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:15:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:15:52,561 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:15:52,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:15:52,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:15:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:15:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 19:15:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:15:53,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:53,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:15:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:15:53,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:15:53,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:15:53,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:15:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:15:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6383865] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:15:54,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:15:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-30 19:15:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273353675] [2023-08-30 19:15:54,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:15:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:15:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:15:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:15:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:15:54,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:15:54,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 808 transitions, 17294 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:15:54,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:15:54,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:15:54,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:16:02,503 INFO L130 PetriNetUnfolder]: 23804/35379 cut-off events. [2023-08-30 19:16:02,504 INFO L131 PetriNetUnfolder]: For 714179/714179 co-relation queries the response was YES. [2023-08-30 19:16:03,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247453 conditions, 35379 events. 23804/35379 cut-off events. For 714179/714179 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 246156 event pairs, 2771 based on Foata normal form. 21/33406 useless extension candidates. Maximal degree in co-relation 247361. Up to 15046 conditions per place. [2023-08-30 19:16:03,354 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 635 selfloop transitions, 402 changer transitions 28/1065 dead transitions. [2023-08-30 19:16:03,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1065 transitions, 22815 flow [2023-08-30 19:16:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:16:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:16:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3138 transitions. [2023-08-30 19:16:03,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063714063714064 [2023-08-30 19:16:03,358 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3138 transitions. [2023-08-30 19:16:03,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3138 transitions. [2023-08-30 19:16:03,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:16:03,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3138 transitions. [2023-08-30 19:16:03,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.3846153846154) internal successors, (3138), 13 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:03,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:03,368 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:03,368 INFO L175 Difference]: Start difference. First operand has 260 places, 808 transitions, 17294 flow. Second operand 13 states and 3138 transitions. [2023-08-30 19:16:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1065 transitions, 22815 flow [2023-08-30 19:16:13,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1065 transitions, 21880 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-08-30 19:16:13,470 INFO L231 Difference]: Finished difference. Result has 265 places, 851 transitions, 18672 flow [2023-08-30 19:16:13,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16449, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18672, PETRI_PLACES=265, PETRI_TRANSITIONS=851} [2023-08-30 19:16:13,471 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 227 predicate places. [2023-08-30 19:16:13,471 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 851 transitions, 18672 flow [2023-08-30 19:16:13,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:16:13,472 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, 1] [2023-08-30 19:16:13,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:16:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:16:13,672 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:16:13,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:16:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1153144357, now seen corresponding path program 5 times [2023-08-30 19:16:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:16:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606455177] [2023-08-30 19:16:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:16:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:16:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:16:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:16:13,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:16:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606455177] [2023-08-30 19:16:13,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606455177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:16:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982582783] [2023-08-30 19:16:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:16:13,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:16:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:16:13,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:16:13,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:16:13,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:16:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:16:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 19:16:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:16:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:16:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:16:14,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:16:14,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:16:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:16:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982582783] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:16:14,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:16:14,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-30 19:16:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373283700] [2023-08-30 19:16:14,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:16:14,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:16:14,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:16:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:16:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:16:15,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 594 [2023-08-30 19:16:15,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 851 transitions, 18672 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:15,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:16:15,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 594 [2023-08-30 19:16:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:16:24,532 INFO L130 PetriNetUnfolder]: 23805/35466 cut-off events. [2023-08-30 19:16:24,532 INFO L131 PetriNetUnfolder]: For 837453/837453 co-relation queries the response was YES. [2023-08-30 19:16:24,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255607 conditions, 35466 events. 23805/35466 cut-off events. For 837453/837453 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 247607 event pairs, 3077 based on Foata normal form. 6/33450 useless extension candidates. Maximal degree in co-relation 255510. Up to 13545 conditions per place. [2023-08-30 19:16:24,983 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 672 selfloop transitions, 403 changer transitions 19/1094 dead transitions. [2023-08-30 19:16:24,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1094 transitions, 24066 flow [2023-08-30 19:16:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:16:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:16:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3152 transitions. [2023-08-30 19:16:24,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081844081844082 [2023-08-30 19:16:24,986 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3152 transitions. [2023-08-30 19:16:24,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3152 transitions. [2023-08-30 19:16:24,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:16:24,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3152 transitions. [2023-08-30 19:16:24,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.46153846153845) internal successors, (3152), 13 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:24,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:24,994 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:24,994 INFO L175 Difference]: Start difference. First operand has 265 places, 851 transitions, 18672 flow. Second operand 13 states and 3152 transitions. [2023-08-30 19:16:24,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1094 transitions, 24066 flow [2023-08-30 19:16:36,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1094 transitions, 23313 flow, removed 167 selfloop flow, removed 8 redundant places. [2023-08-30 19:16:36,625 INFO L231 Difference]: Finished difference. Result has 274 places, 878 transitions, 19662 flow [2023-08-30 19:16:36,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18078, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19662, PETRI_PLACES=274, PETRI_TRANSITIONS=878} [2023-08-30 19:16:36,626 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 236 predicate places. [2023-08-30 19:16:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 878 transitions, 19662 flow [2023-08-30 19:16:36,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:16:36,627 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, 1] [2023-08-30 19:16:36,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 19:16:36,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 19:16:36,827 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:16:36,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:16:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1760226384, now seen corresponding path program 6 times [2023-08-30 19:16:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:16:36,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792150899] [2023-08-30 19:16:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:16:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:16:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:16:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:16:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:16:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792150899] [2023-08-30 19:16:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792150899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:16:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739746119] [2023-08-30 19:16:37,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:16:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:16:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:16:37,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:16:37,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 19:16:37,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:16:37,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:16:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:16:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:16:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:16:37,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:16:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739746119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:16:37,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:16:37,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:16:37,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042613685] [2023-08-30 19:16:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:16:37,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:16:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:16:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:16:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:16:38,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:16:38,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 878 transitions, 19662 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:38,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:16:38,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:16:38,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:16:46,604 INFO L130 PetriNetUnfolder]: 23600/35175 cut-off events. [2023-08-30 19:16:46,604 INFO L131 PetriNetUnfolder]: For 838763/838763 co-relation queries the response was YES. [2023-08-30 19:16:46,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254979 conditions, 35175 events. 23600/35175 cut-off events. For 838763/838763 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 245469 event pairs, 4435 based on Foata normal form. 42/33199 useless extension candidates. Maximal degree in co-relation 254879. Up to 21113 conditions per place. [2023-08-30 19:16:47,062 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 542 selfloop transitions, 495 changer transitions 9/1046 dead transitions. [2023-08-30 19:16:47,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1046 transitions, 23362 flow [2023-08-30 19:16:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:16:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:16:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3761 transitions. [2023-08-30 19:16:47,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42210998877665545 [2023-08-30 19:16:47,065 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3761 transitions. [2023-08-30 19:16:47,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3761 transitions. [2023-08-30 19:16:47,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:16:47,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3761 transitions. [2023-08-30 19:16:47,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.73333333333332) internal successors, (3761), 15 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:47,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:47,073 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:47,074 INFO L175 Difference]: Start difference. First operand has 274 places, 878 transitions, 19662 flow. Second operand 15 states and 3761 transitions. [2023-08-30 19:16:47,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1046 transitions, 23362 flow [2023-08-30 19:16:57,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1046 transitions, 22685 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-08-30 19:16:57,630 INFO L231 Difference]: Finished difference. Result has 286 places, 878 transitions, 20243 flow [2023-08-30 19:16:57,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18947, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20243, PETRI_PLACES=286, PETRI_TRANSITIONS=878} [2023-08-30 19:16:57,631 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 248 predicate places. [2023-08-30 19:16:57,631 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 878 transitions, 20243 flow [2023-08-30 19:16:57,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:57,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:16:57,632 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, 1] [2023-08-30 19:16:57,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 19:16:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:16:57,833 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:16:57,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:16:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1381273835, now seen corresponding path program 6 times [2023-08-30 19:16:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:16:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104116304] [2023-08-30 19:16:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:16:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:16:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:16:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:16:58,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:16:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104116304] [2023-08-30 19:16:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104116304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:16:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795873288] [2023-08-30 19:16:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:16:58,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:16:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:16:58,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:16:58,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 19:16:58,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:16:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:16:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:16:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:16:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:16:58,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:16:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795873288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:16:58,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:16:58,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:16:58,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288481418] [2023-08-30 19:16:58,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:16:58,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:16:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:16:58,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:16:58,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:16:59,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-08-30 19:16:59,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 878 transitions, 20243 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:16:59,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:16:59,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-08-30 19:16:59,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:17:07,597 INFO L130 PetriNetUnfolder]: 23379/34834 cut-off events. [2023-08-30 19:17:07,597 INFO L131 PetriNetUnfolder]: For 763903/763903 co-relation queries the response was YES. [2023-08-30 19:17:07,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251152 conditions, 34834 events. 23379/34834 cut-off events. For 763903/763903 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 241847 event pairs, 3563 based on Foata normal form. 37/32869 useless extension candidates. Maximal degree in co-relation 251047. Up to 18492 conditions per place. [2023-08-30 19:17:08,091 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 447 selfloop transitions, 547 changer transitions 11/1005 dead transitions. [2023-08-30 19:17:08,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1005 transitions, 23446 flow [2023-08-30 19:17:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:17:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:17:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3263 transitions. [2023-08-30 19:17:08,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225589225589226 [2023-08-30 19:17:08,093 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3263 transitions. [2023-08-30 19:17:08,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3263 transitions. [2023-08-30 19:17:08,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:17:08,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3263 transitions. [2023-08-30 19:17:08,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:08,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:08,101 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:08,101 INFO L175 Difference]: Start difference. First operand has 286 places, 878 transitions, 20243 flow. Second operand 13 states and 3263 transitions. [2023-08-30 19:17:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1005 transitions, 23446 flow [2023-08-30 19:17:17,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1005 transitions, 22628 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 19:17:17,949 INFO L231 Difference]: Finished difference. Result has 293 places, 881 transitions, 20713 flow [2023-08-30 19:17:17,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19353, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20713, PETRI_PLACES=293, PETRI_TRANSITIONS=881} [2023-08-30 19:17:17,950 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 255 predicate places. [2023-08-30 19:17:17,950 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 881 transitions, 20713 flow [2023-08-30 19:17:17,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:17,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:17:17,951 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, 1] [2023-08-30 19:17:17,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 19:17:18,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:17:18,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:17:18,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:17:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash -91455062, now seen corresponding path program 7 times [2023-08-30 19:17:18,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:17:18,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690744646] [2023-08-30 19:17:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:17:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:17:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:17:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:17:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:17:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690744646] [2023-08-30 19:17:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690744646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:17:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815127577] [2023-08-30 19:17:18,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:17:18,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:17:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:17:18,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:17:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 19:17:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:17:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 19:17:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:17:18,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:17:18,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-08-30 19:17:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:17:18,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:17:19,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:17:19,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:17:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:17:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815127577] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:17:20,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:17:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-30 19:17:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117090703] [2023-08-30 19:17:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:17:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:17:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:17:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:17:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2023-08-30 19:17:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-30 19:17:20,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 881 transitions, 20713 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:20,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:17:20,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-30 19:17:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:17:31,319 INFO L130 PetriNetUnfolder]: 23785/35596 cut-off events. [2023-08-30 19:17:31,319 INFO L131 PetriNetUnfolder]: For 791573/791573 co-relation queries the response was YES. [2023-08-30 19:17:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259730 conditions, 35596 events. 23785/35596 cut-off events. For 791573/791573 co-relation queries the response was YES. Maximal size of possible extension queue 1790. Compared 250623 event pairs, 2579 based on Foata normal form. 4/33598 useless extension candidates. Maximal degree in co-relation 259621. Up to 11880 conditions per place. [2023-08-30 19:17:31,703 INFO L137 encePairwiseOnDemand]: 577/594 looper letters, 493 selfloop transitions, 601 changer transitions 17/1111 dead transitions. [2023-08-30 19:17:31,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1111 transitions, 25815 flow [2023-08-30 19:17:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:17:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:17:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3829 transitions. [2023-08-30 19:17:31,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40288299663299665 [2023-08-30 19:17:31,706 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3829 transitions. [2023-08-30 19:17:31,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3829 transitions. [2023-08-30 19:17:31,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:17:31,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3829 transitions. [2023-08-30 19:17:31,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 239.3125) internal successors, (3829), 16 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:31,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:31,713 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:31,714 INFO L175 Difference]: Start difference. First operand has 293 places, 881 transitions, 20713 flow. Second operand 16 states and 3829 transitions. [2023-08-30 19:17:31,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1111 transitions, 25815 flow [2023-08-30 19:17:42,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1111 transitions, 24699 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-08-30 19:17:42,587 INFO L231 Difference]: Finished difference. Result has 304 places, 910 transitions, 21947 flow [2023-08-30 19:17:42,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19661, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21947, PETRI_PLACES=304, PETRI_TRANSITIONS=910} [2023-08-30 19:17:42,588 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 266 predicate places. [2023-08-30 19:17:42,588 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 910 transitions, 21947 flow [2023-08-30 19:17:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:17:42,589 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, 1] [2023-08-30 19:17:42,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 19:17:42,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 19:17:42,795 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:17:42,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:17:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash -187961245, now seen corresponding path program 4 times [2023-08-30 19:17:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:17:42,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881628653] [2023-08-30 19:17:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:17:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:17:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:17:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:17:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:17:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881628653] [2023-08-30 19:17:43,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881628653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:17:43,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005047617] [2023-08-30 19:17:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:17:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:17:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:17:43,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:17:43,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 19:17:43,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:17:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:17:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 19:17:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:17:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:17:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:17:43,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:17:43,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:17:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:17:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005047617] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:17:44,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:17:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2023-08-30 19:17:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607867141] [2023-08-30 19:17:44,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:17:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:17:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:17:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:17:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:17:45,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-30 19:17:45,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 910 transitions, 21947 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:45,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:17:45,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-30 19:17:45,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:17:56,033 INFO L130 PetriNetUnfolder]: 23718/35976 cut-off events. [2023-08-30 19:17:56,033 INFO L131 PetriNetUnfolder]: For 906504/906504 co-relation queries the response was YES. [2023-08-30 19:17:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256795 conditions, 35976 events. 23718/35976 cut-off events. For 906504/906504 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 260749 event pairs, 5803 based on Foata normal form. 586/34458 useless extension candidates. Maximal degree in co-relation 256682. Up to 11578 conditions per place. [2023-08-30 19:17:56,752 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 567 selfloop transitions, 563 changer transitions 45/1175 dead transitions. [2023-08-30 19:17:56,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1175 transitions, 27825 flow [2023-08-30 19:17:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:17:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:17:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4210 transitions. [2023-08-30 19:17:56,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169142404436522 [2023-08-30 19:17:56,757 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4210 transitions. [2023-08-30 19:17:56,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4210 transitions. [2023-08-30 19:17:56,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:17:56,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4210 transitions. [2023-08-30 19:17:56,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 247.64705882352942) internal successors, (4210), 17 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:56,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:56,764 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:17:56,764 INFO L175 Difference]: Start difference. First operand has 304 places, 910 transitions, 21947 flow. Second operand 17 states and 4210 transitions. [2023-08-30 19:17:56,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1175 transitions, 27825 flow [2023-08-30 19:18:08,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1175 transitions, 26725 flow, removed 103 selfloop flow, removed 8 redundant places. [2023-08-30 19:18:08,668 INFO L231 Difference]: Finished difference. Result has 320 places, 949 transitions, 23534 flow [2023-08-30 19:18:08,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=20976, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23534, PETRI_PLACES=320, PETRI_TRANSITIONS=949} [2023-08-30 19:18:08,669 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2023-08-30 19:18:08,669 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 949 transitions, 23534 flow [2023-08-30 19:18:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:08,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:08,670 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, 1] [2023-08-30 19:18:08,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 19:18:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:08,870 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:18:08,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:08,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1982050721, now seen corresponding path program 7 times [2023-08-30 19:18:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891654651] [2023-08-30 19:18:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:18:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:18:09,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:18:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891654651] [2023-08-30 19:18:09,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891654651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:18:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396812624] [2023-08-30 19:18:09,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:18:09,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:09,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:18:09,032 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:18:09,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 19:18:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:18:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:18:09,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:18:09,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 101 [2023-08-30 19:18:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:18:09,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:18:09,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:18:09,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:18:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:18:11,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396812624] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:18:11,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:18:11,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 11] total 28 [2023-08-30 19:18:11,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045092863] [2023-08-30 19:18:11,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:18:11,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:18:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:11,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:18:11,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-30 19:18:12,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 594 [2023-08-30 19:18:12,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 949 transitions, 23534 flow. Second operand has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:12,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:12,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 594 [2023-08-30 19:18:12,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:25,520 INFO L130 PetriNetUnfolder]: 23408/35373 cut-off events. [2023-08-30 19:18:25,520 INFO L131 PetriNetUnfolder]: For 958898/958898 co-relation queries the response was YES. [2023-08-30 19:18:25,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264964 conditions, 35373 events. 23408/35373 cut-off events. For 958898/958898 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 254271 event pairs, 3727 based on Foata normal form. 1/33270 useless extension candidates. Maximal degree in co-relation 264843. Up to 15123 conditions per place. [2023-08-30 19:18:26,066 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 666 selfloop transitions, 441 changer transitions 23/1130 dead transitions. [2023-08-30 19:18:26,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1130 transitions, 27588 flow [2023-08-30 19:18:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:18:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:18:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3856 transitions. [2023-08-30 19:18:26,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057239057239057 [2023-08-30 19:18:26,070 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3856 transitions. [2023-08-30 19:18:26,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3856 transitions. [2023-08-30 19:18:26,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:26,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3856 transitions. [2023-08-30 19:18:26,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:26,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:26,080 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:26,081 INFO L175 Difference]: Start difference. First operand has 320 places, 949 transitions, 23534 flow. Second operand 16 states and 3856 transitions. [2023-08-30 19:18:26,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1130 transitions, 27588 flow [2023-08-30 19:18:41,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1130 transitions, 27046 flow, removed 87 selfloop flow, removed 8 redundant places. [2023-08-30 19:18:41,943 INFO L231 Difference]: Finished difference. Result has 330 places, 960 transitions, 24189 flow [2023-08-30 19:18:41,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23008, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24189, PETRI_PLACES=330, PETRI_TRANSITIONS=960} [2023-08-30 19:18:41,944 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-08-30 19:18:41,944 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 960 transitions, 24189 flow [2023-08-30 19:18:41,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:41,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:18:41,945 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, 1] [2023-08-30 19:18:41,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 19:18:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:42,146 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:18:42,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:18:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1622135649, now seen corresponding path program 8 times [2023-08-30 19:18:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:18:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413729665] [2023-08-30 19:18:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:18:42,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:18:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:18:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:18:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:18:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413729665] [2023-08-30 19:18:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413729665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:18:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086627001] [2023-08-30 19:18:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:18:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:18:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:18:42,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:18:42,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 19:18:42,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:18:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:18:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 19:18:42,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:18:42,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:18:42,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:18:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:18:42,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:18:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086627001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:18:42,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:18:42,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:18:42,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405472100] [2023-08-30 19:18:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:18:42,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:18:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:18:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:18:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:18:43,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:18:43,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 960 transitions, 24189 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:43,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:18:43,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:18:43,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:18:53,696 INFO L130 PetriNetUnfolder]: 23246/35167 cut-off events. [2023-08-30 19:18:53,696 INFO L131 PetriNetUnfolder]: For 947672/947672 co-relation queries the response was YES. [2023-08-30 19:18:54,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267558 conditions, 35167 events. 23246/35167 cut-off events. For 947672/947672 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 252388 event pairs, 3657 based on Foata normal form. 53/33124 useless extension candidates. Maximal degree in co-relation 267435. Up to 17902 conditions per place. [2023-08-30 19:18:54,196 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 496 selfloop transitions, 598 changer transitions 25/1119 dead transitions. [2023-08-30 19:18:54,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1119 transitions, 27653 flow [2023-08-30 19:18:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:18:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:18:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4484 transitions. [2023-08-30 19:18:54,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41937897493453047 [2023-08-30 19:18:54,200 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4484 transitions. [2023-08-30 19:18:54,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4484 transitions. [2023-08-30 19:18:54,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:18:54,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4484 transitions. [2023-08-30 19:18:54,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 249.11111111111111) internal successors, (4484), 18 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:54,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:54,208 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:18:54,208 INFO L175 Difference]: Start difference. First operand has 330 places, 960 transitions, 24189 flow. Second operand 18 states and 4484 transitions. [2023-08-30 19:18:54,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1119 transitions, 27653 flow [2023-08-30 19:19:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1119 transitions, 26995 flow, removed 54 selfloop flow, removed 9 redundant places. [2023-08-30 19:19:08,533 INFO L231 Difference]: Finished difference. Result has 339 places, 960 transitions, 24844 flow [2023-08-30 19:19:08,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23510, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24844, PETRI_PLACES=339, PETRI_TRANSITIONS=960} [2023-08-30 19:19:08,534 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 301 predicate places. [2023-08-30 19:19:08,535 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 960 transitions, 24844 flow [2023-08-30 19:19:08,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:08,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:08,535 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, 1] [2023-08-30 19:19:08,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 19:19:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:19:08,736 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:19:08,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 857805660, now seen corresponding path program 8 times [2023-08-30 19:19:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:08,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552561630] [2023-08-30 19:19:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:08,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552561630] [2023-08-30 19:19:08,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552561630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:19:08,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984558267] [2023-08-30 19:19:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:19:08,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:19:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:19:08,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:19:08,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 19:19:09,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 19:19:09,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:19:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 19:19:09,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:19:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:19:09,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:19:09,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984558267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:19:09,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:19:09,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 15 [2023-08-30 19:19:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733430585] [2023-08-30 19:19:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:19:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:19:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:19:09,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:19:09,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 960 transitions, 24844 flow. Second operand has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:09,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:09,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:19:09,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:19,632 INFO L130 PetriNetUnfolder]: 22363/34077 cut-off events. [2023-08-30 19:19:19,632 INFO L131 PetriNetUnfolder]: For 979654/979654 co-relation queries the response was YES. [2023-08-30 19:19:20,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257250 conditions, 34077 events. 22363/34077 cut-off events. For 979654/979654 co-relation queries the response was YES. Maximal size of possible extension queue 1854. Compared 247425 event pairs, 3725 based on Foata normal form. 316/32313 useless extension candidates. Maximal degree in co-relation 257125. Up to 21107 conditions per place. [2023-08-30 19:19:20,446 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 624 selfloop transitions, 541 changer transitions 26/1191 dead transitions. [2023-08-30 19:19:20,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1191 transitions, 29571 flow [2023-08-30 19:19:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 19:19:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 19:19:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4531 transitions. [2023-08-30 19:19:20,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423774784885896 [2023-08-30 19:19:20,452 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4531 transitions. [2023-08-30 19:19:20,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4531 transitions. [2023-08-30 19:19:20,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:20,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4531 transitions. [2023-08-30 19:19:20,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 251.72222222222223) internal successors, (4531), 18 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,463 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:20,464 INFO L175 Difference]: Start difference. First operand has 339 places, 960 transitions, 24844 flow. Second operand 18 states and 4531 transitions. [2023-08-30 19:19:20,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1191 transitions, 29571 flow [2023-08-30 19:19:34,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1191 transitions, 28540 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-08-30 19:19:34,956 INFO L231 Difference]: Finished difference. Result has 350 places, 981 transitions, 25652 flow [2023-08-30 19:19:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23484, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25652, PETRI_PLACES=350, PETRI_TRANSITIONS=981} [2023-08-30 19:19:34,957 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 312 predicate places. [2023-08-30 19:19:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 981 transitions, 25652 flow [2023-08-30 19:19:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:34,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:19:34,958 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, 1] [2023-08-30 19:19:34,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 19:19:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 19:19:35,169 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:19:35,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:19:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1131905989, now seen corresponding path program 5 times [2023-08-30 19:19:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:19:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433300671] [2023-08-30 19:19:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:19:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:19:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:19:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:19:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433300671] [2023-08-30 19:19:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433300671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:19:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616719838] [2023-08-30 19:19:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:19:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:19:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:19:35,575 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:19:35,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 19:19:35,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:19:35,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:19:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 19:19:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:19:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:36,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:19:36,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:19:36,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:19:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:19:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616719838] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:19:37,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:19:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-08-30 19:19:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846439523] [2023-08-30 19:19:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:19:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:19:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:19:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:19:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:19:38,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-30 19:19:38,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 981 transitions, 25652 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:38,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:19:38,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-30 19:19:38,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:19:49,052 INFO L130 PetriNetUnfolder]: 22299/33910 cut-off events. [2023-08-30 19:19:49,053 INFO L131 PetriNetUnfolder]: For 1017741/1017741 co-relation queries the response was YES. [2023-08-30 19:19:49,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259913 conditions, 33910 events. 22299/33910 cut-off events. For 1017741/1017741 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 245138 event pairs, 5229 based on Foata normal form. 15/31845 useless extension candidates. Maximal degree in co-relation 259783. Up to 10842 conditions per place. [2023-08-30 19:19:49,508 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 570 selfloop transitions, 554 changer transitions 63/1187 dead transitions. [2023-08-30 19:19:49,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1187 transitions, 30300 flow [2023-08-30 19:19:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:19:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:19:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4194 transitions. [2023-08-30 19:19:49,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41532976827094475 [2023-08-30 19:19:49,512 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4194 transitions. [2023-08-30 19:19:49,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4194 transitions. [2023-08-30 19:19:49,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:19:49,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4194 transitions. [2023-08-30 19:19:49,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 246.7058823529412) internal successors, (4194), 17 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:49,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:49,522 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:19:49,522 INFO L175 Difference]: Start difference. First operand has 350 places, 981 transitions, 25652 flow. Second operand 17 states and 4194 transitions. [2023-08-30 19:19:49,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1187 transitions, 30300 flow [2023-08-30 19:20:02,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1187 transitions, 29307 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-08-30 19:20:02,578 INFO L231 Difference]: Finished difference. Result has 360 places, 957 transitions, 25119 flow [2023-08-30 19:20:02,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24680, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25119, PETRI_PLACES=360, PETRI_TRANSITIONS=957} [2023-08-30 19:20:02,579 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 322 predicate places. [2023-08-30 19:20:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 957 transitions, 25119 flow [2023-08-30 19:20:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:02,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:02,580 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, 1] [2023-08-30 19:20:02,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 19:20:02,781 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:02,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1496257113, now seen corresponding path program 6 times [2023-08-30 19:20:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074047482] [2023-08-30 19:20:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:03,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074047482] [2023-08-30 19:20:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074047482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000172242] [2023-08-30 19:20:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:20:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:03,176 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:20:03,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:20:03,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 19:20:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:20:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 19:20:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:03,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:20:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000172242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:03,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:20:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-30 19:20:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042876988] [2023-08-30 19:20:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:20:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:20:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:20:04,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-08-30 19:20:04,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 957 transitions, 25119 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:04,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:04,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-08-30 19:20:04,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:13,338 INFO L130 PetriNetUnfolder]: 22265/33767 cut-off events. [2023-08-30 19:20:13,339 INFO L131 PetriNetUnfolder]: For 1027068/1027068 co-relation queries the response was YES. [2023-08-30 19:20:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258412 conditions, 33767 events. 22265/33767 cut-off events. For 1027068/1027068 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 242254 event pairs, 5355 based on Foata normal form. 15/31668 useless extension candidates. Maximal degree in co-relation 258280. Up to 12820 conditions per place. [2023-08-30 19:20:13,799 INFO L137 encePairwiseOnDemand]: 583/594 looper letters, 467 selfloop transitions, 592 changer transitions 30/1089 dead transitions. [2023-08-30 19:20:13,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1089 transitions, 29065 flow [2023-08-30 19:20:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:20:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:20:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2310 transitions. [2023-08-30 19:20:13,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-30 19:20:13,802 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2310 transitions. [2023-08-30 19:20:13,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2310 transitions. [2023-08-30 19:20:13,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:13,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2310 transitions. [2023-08-30 19:20:13,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.6666666666667) internal successors, (2310), 9 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,806 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:13,806 INFO L175 Difference]: Start difference. First operand has 360 places, 957 transitions, 25119 flow. Second operand 9 states and 2310 transitions. [2023-08-30 19:20:13,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1089 transitions, 29065 flow [2023-08-30 19:20:27,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1089 transitions, 28460 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-30 19:20:27,101 INFO L231 Difference]: Finished difference. Result has 358 places, 969 transitions, 26430 flow [2023-08-30 19:20:27,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24514, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26430, PETRI_PLACES=358, PETRI_TRANSITIONS=969} [2023-08-30 19:20:27,102 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 320 predicate places. [2023-08-30 19:20:27,102 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 969 transitions, 26430 flow [2023-08-30 19:20:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:27,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:27,103 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, 1] [2023-08-30 19:20:27,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 19:20:27,304 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:27,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1657957736, now seen corresponding path program 9 times [2023-08-30 19:20:27,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:27,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033359575] [2023-08-30 19:20:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033359575] [2023-08-30 19:20:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033359575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453410359] [2023-08-30 19:20:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:20:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:27,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:27,466 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:20:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 19:20:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:20:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:20:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 19:20:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:27,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:20:27,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453410359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:20:27,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:20:27,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:20:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602625344] [2023-08-30 19:20:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:20:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:20:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:20:28,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:20:28,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 969 transitions, 26430 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:28,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:28,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:20:28,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:20:38,350 INFO L130 PetriNetUnfolder]: 22063/33348 cut-off events. [2023-08-30 19:20:38,350 INFO L131 PetriNetUnfolder]: For 1022972/1022972 co-relation queries the response was YES. [2023-08-30 19:20:38,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265553 conditions, 33348 events. 22063/33348 cut-off events. For 1022972/1022972 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 237870 event pairs, 3641 based on Foata normal form. 4/31238 useless extension candidates. Maximal degree in co-relation 265420. Up to 20787 conditions per place. [2023-08-30 19:20:38,869 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 620 selfloop transitions, 510 changer transitions 15/1145 dead transitions. [2023-08-30 19:20:38,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1145 transitions, 30506 flow [2023-08-30 19:20:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:20:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:20:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4252 transitions. [2023-08-30 19:20:38,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42107347989700933 [2023-08-30 19:20:38,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4252 transitions. [2023-08-30 19:20:38,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4252 transitions. [2023-08-30 19:20:38,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:20:38,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4252 transitions. [2023-08-30 19:20:38,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 250.11764705882354) internal successors, (4252), 17 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,883 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:38,883 INFO L175 Difference]: Start difference. First operand has 358 places, 969 transitions, 26430 flow. Second operand 17 states and 4252 transitions. [2023-08-30 19:20:38,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1145 transitions, 30506 flow [2023-08-30 19:20:54,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1145 transitions, 29330 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-30 19:20:54,628 INFO L231 Difference]: Finished difference. Result has 368 places, 970 transitions, 26325 flow [2023-08-30 19:20:54,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=25278, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26325, PETRI_PLACES=368, PETRI_TRANSITIONS=970} [2023-08-30 19:20:54,629 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 330 predicate places. [2023-08-30 19:20:54,629 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 970 transitions, 26325 flow [2023-08-30 19:20:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:54,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:20:54,630 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, 1] [2023-08-30 19:20:54,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 19:20:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:54,836 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:20:54,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:20:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 485061456, now seen corresponding path program 10 times [2023-08-30 19:20:54,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:20:54,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201120083] [2023-08-30 19:20:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:20:54,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:20:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:20:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:20:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201120083] [2023-08-30 19:20:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201120083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272402477] [2023-08-30 19:20:54,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:20:54,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:20:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:20:54,983 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:20:54,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 19:20:55,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:20:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:20:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 19:20:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:20:55,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:20:55,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-08-30 19:20:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:20:55,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:20:55,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:20:55,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-30 19:20:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:20:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272402477] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 19:20:56,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 19:20:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 11] total 24 [2023-08-30 19:20:56,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987914078] [2023-08-30 19:20:56,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:20:56,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:20:56,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:20:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:20:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-30 19:20:57,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 594 [2023-08-30 19:20:57,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 970 transitions, 26325 flow. Second operand has 8 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:20:57,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:20:57,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 594 [2023-08-30 19:20:57,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:21:23,296 INFO L130 PetriNetUnfolder]: 48741/73393 cut-off events. [2023-08-30 19:21:23,296 INFO L131 PetriNetUnfolder]: For 2301921/2301921 co-relation queries the response was YES. [2023-08-30 19:21:24,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570425 conditions, 73393 events. 48741/73393 cut-off events. For 2301921/2301921 co-relation queries the response was YES. Maximal size of possible extension queue 3685. Compared 575758 event pairs, 5734 based on Foata normal form. 5/68840 useless extension candidates. Maximal degree in co-relation 570293. Up to 27290 conditions per place. [2023-08-30 19:21:24,954 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 1274 selfloop transitions, 1714 changer transitions 23/3011 dead transitions. [2023-08-30 19:21:24,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 3011 transitions, 86789 flow [2023-08-30 19:21:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:21:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:21:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 6644 transitions. [2023-08-30 19:21:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301994301994302 [2023-08-30 19:21:24,958 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 6644 transitions. [2023-08-30 19:21:24,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 6644 transitions. [2023-08-30 19:21:24,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:21:24,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 6644 transitions. [2023-08-30 19:21:24,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 255.53846153846155) internal successors, (6644), 26 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:24,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 594.0) internal successors, (16038), 27 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:24,969 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 594.0) internal successors, (16038), 27 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:21:24,969 INFO L175 Difference]: Start difference. First operand has 368 places, 970 transitions, 26325 flow. Second operand 26 states and 6644 transitions. [2023-08-30 19:21:24,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 3011 transitions, 86789 flow [2023-08-30 19:22:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 3011 transitions, 83949 flow, removed 48 selfloop flow, removed 10 redundant places. [2023-08-30 19:22:27,845 INFO L231 Difference]: Finished difference. Result has 402 places, 2390 transitions, 73220 flow [2023-08-30 19:22:27,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=25456, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=73220, PETRI_PLACES=402, PETRI_TRANSITIONS=2390} [2023-08-30 19:22:27,846 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 364 predicate places. [2023-08-30 19:22:27,846 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 2390 transitions, 73220 flow [2023-08-30 19:22:27,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:27,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:22:27,846 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, 1] [2023-08-30 19:22:27,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 19:22:28,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:28,047 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:22:28,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:22:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -859825455, now seen corresponding path program 9 times [2023-08-30 19:22:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:22:28,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829471982] [2023-08-30 19:22:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:22:28,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:22:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:22:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:22:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:22:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829471982] [2023-08-30 19:22:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829471982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:22:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370692784] [2023-08-30 19:22:28,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:22:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:22:28,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:22:28,185 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:22:28,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 19:22:28,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 19:22:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:22:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 19:22:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:22:28,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:22:28,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-30 19:22:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:22:28,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 19:22:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370692784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:22:28,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 19:22:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-30 19:22:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955090720] [2023-08-30 19:22:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:22:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:22:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:22:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:22:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-08-30 19:22:29,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-30 19:22:29,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 2390 transitions, 73220 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:22:29,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:22:29,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-30 19:22:29,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:23:02,804 INFO L130 PetriNetUnfolder]: 48684/73375 cut-off events. [2023-08-30 19:23:02,805 INFO L131 PetriNetUnfolder]: For 2861864/2861864 co-relation queries the response was YES. [2023-08-30 19:23:04,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624709 conditions, 73375 events. 48684/73375 cut-off events. For 2861864/2861864 co-relation queries the response was YES. Maximal size of possible extension queue 3674. Compared 573621 event pairs, 6953 based on Foata normal form. 8/68825 useless extension candidates. Maximal degree in co-relation 624560. Up to 37016 conditions per place. [2023-08-30 19:23:04,763 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 999 selfloop transitions, 1589 changer transitions 28/2616 dead transitions. [2023-08-30 19:23:04,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2616 transitions, 80945 flow [2023-08-30 19:23:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:23:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:23:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4241 transitions. [2023-08-30 19:23:04,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41998415527827293 [2023-08-30 19:23:04,767 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4241 transitions. [2023-08-30 19:23:04,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4241 transitions. [2023-08-30 19:23:04,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:23:04,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4241 transitions. [2023-08-30 19:23:04,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 249.47058823529412) internal successors, (4241), 17 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:04,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:04,775 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:23:04,775 INFO L175 Difference]: Start difference. First operand has 402 places, 2390 transitions, 73220 flow. Second operand 17 states and 4241 transitions. [2023-08-30 19:23:04,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2616 transitions, 80945 flow