./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:12:52,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:12:52,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:12:52,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:12:52,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:12:52,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:12:52,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:12:52,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:12:52,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:12:52,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:12:52,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:12:52,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:12:52,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:12:52,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:12:52,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:12:52,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:12:52,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:12:52,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:12:52,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:12:52,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:12:52,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:12:52,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:12:52,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:12:52,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:12:52,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:12:52,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:12:52,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:12:52,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:12:52,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:12:52,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:12:52,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:12:52,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:12:52,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:12:52,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:12:52,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:12:52,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:12:52,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:12:52,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:12:52,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:12:52,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:12:52,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:12:52,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:12:52,308 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:12:52,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:12:52,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:12:52,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:12:52,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:12:52,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:12:52,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:12:52,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:12:52,311 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:12:52,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:12:52,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:12:52,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:12:52,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:12:52,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:12:52,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:12:52,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:12:52,315 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:12:52,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:12:52,315 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:12:52,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:12:52,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:12:52,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:12:52,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:12:52,589 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:12:52,589 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:12:52,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-09-01 12:12:53,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:12:53,651 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:12:53,652 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-09-01 12:12:53,661 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b33f67a/980c18785ce04834abc703fcdc739c0b/FLAGc943c4c24 [2023-09-01 12:12:53,674 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b33f67a/980c18785ce04834abc703fcdc739c0b [2023-09-01 12:12:53,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:12:53,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:12:53,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:12:53,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:12:53,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:12:53,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:53,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5635454f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53, skipping insertion in model container [2023-09-01 12:12:53,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:53,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:12:53,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:12:53,897 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-09-01 12:12:53,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:12:53,924 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:12:53,960 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-09-01 12:12:53,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:12:53,973 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:12:53,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53 WrapperNode [2023-09-01 12:12:53,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:12:53,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:12:53,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:12:53,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:12:53,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,042 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-09-01 12:12:54,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:12:54,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:12:54,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:12:54,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:12:54,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:12:54,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:12:54,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:12:54,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:12:54,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (1/1) ... [2023-09-01 12:12:54,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:12:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:12:54,124 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) [2023-09-01 12:12:54,131 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 [2023-09-01 12:12:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:12:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:12:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:12:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:12:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:12:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:12:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:12:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:12:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:12:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:12:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:12:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:12:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:12:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:12:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:12:54,162 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:12:54,257 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:12:54,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:12:54,835 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:12:54,849 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:12:54,850 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 12:12:54,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:12:54 BoogieIcfgContainer [2023-09-01 12:12:54,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:12:54,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:12:54,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:12:54,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:12:54,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:12:53" (1/3) ... [2023-09-01 12:12:54,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9841a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:12:54, skipping insertion in model container [2023-09-01 12:12:54,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:12:53" (2/3) ... [2023-09-01 12:12:54,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9841a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:12:54, skipping insertion in model container [2023-09-01 12:12:54,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:12:54" (3/3) ... [2023-09-01 12:12:54,858 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-09-01 12:12:54,863 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:12:54,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:12:54,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:12:54,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:12:55,008 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:12:55,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 717 transitions, 1458 flow [2023-09-01 12:12:55,276 INFO L130 PetriNetUnfolder]: 73/714 cut-off events. [2023-09-01 12:12:55,276 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:12:55,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 714 events. 73/714 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2388 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-09-01 12:12:55,289 INFO L82 GeneralOperation]: Start removeDead. Operand has 654 places, 717 transitions, 1458 flow [2023-09-01 12:12:55,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 704 transitions, 1426 flow [2023-09-01 12:12:55,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:12:55,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 704 transitions, 1426 flow [2023-09-01 12:12:55,314 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 704 transitions, 1426 flow [2023-09-01 12:12:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 704 transitions, 1426 flow [2023-09-01 12:12:55,452 INFO L130 PetriNetUnfolder]: 73/704 cut-off events. [2023-09-01 12:12:55,452 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:12:55,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 704 events. 73/704 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 532. Up to 2 conditions per place. [2023-09-01 12:12:55,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-09-01 12:13:17,812 INFO L134 LiptonReduction]: Checked pairs total: 150057 [2023-09-01 12:13:17,812 INFO L136 LiptonReduction]: Total number of compositions: 891 [2023-09-01 12:13:17,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:13:17,830 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;@38b46130, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:13:17,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:13:17,845 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-09-01 12:13:17,845 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:13:17,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:17,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:17,846 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)] === [2023-09-01 12:13:17,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1427696023, now seen corresponding path program 1 times [2023-09-01 12:13:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915286705] [2023-09-01 12:13:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:13:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915286705] [2023-09-01 12:13:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915286705] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:18,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179337315] [2023-09-01 12:13:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:13:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:13:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:13:18,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 661 out of 1608 [2023-09-01 12:13:18,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:18,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:18,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 661 of 1608 [2023-09-01 12:13:18,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:18,759 INFO L130 PetriNetUnfolder]: 2608/3503 cut-off events. [2023-09-01 12:13:18,759 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-09-01 12:13:18,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7267 conditions, 3503 events. 2608/3503 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12504 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6748. Up to 3501 conditions per place. [2023-09-01 12:13:18,770 INFO L137 encePairwiseOnDemand]: 1600/1608 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-09-01 12:13:18,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 218 flow [2023-09-01 12:13:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:13:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:13:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2037 transitions. [2023-09-01 12:13:18,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222636815920398 [2023-09-01 12:13:18,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2037 transitions. [2023-09-01 12:13:18,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2037 transitions. [2023-09-01 12:13:18,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:18,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2037 transitions. [2023-09-01 12:13:18,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 679.0) internal successors, (2037), 3 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:18,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:18,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:18,805 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 114 flow. Second operand 3 states and 2037 transitions. [2023-09-01 12:13:18,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 218 flow [2023-09-01 12:13:18,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:13:18,811 INFO L231 Difference]: Finished difference. Result has 43 places, 50 transitions, 132 flow [2023-09-01 12:13:18,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=50} [2023-09-01 12:13:18,814 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-09-01 12:13:18,814 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 50 transitions, 132 flow [2023-09-01 12:13:18,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 667.3333333333334) internal successors, (2002), 3 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:18,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:18,815 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] [2023-09-01 12:13:18,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:13:18,816 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)] === [2023-09-01 12:13:18,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2065041558, now seen corresponding path program 1 times [2023-09-01 12:13:18,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:18,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397273818] [2023-09-01 12:13:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:13:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397273818] [2023-09-01 12:13:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397273818] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929720480] [2023-09-01 12:13:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:18,928 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) [2023-09-01 12:13:18,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:13:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:13:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:13:19,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:13:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:13:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929720480] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:13:19,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:13:19,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-09-01 12:13:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160521752] [2023-09-01 12:13:19,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:13:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:13:19,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:13:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:13:19,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-09-01 12:13:19,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:19,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:19,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-09-01 12:13:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:19,790 INFO L130 PetriNetUnfolder]: 2608/3512 cut-off events. [2023-09-01 12:13:19,791 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 12:13:19,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 3512 events. 2608/3512 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12508 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7112. Up to 3501 conditions per place. [2023-09-01 12:13:19,801 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 44 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2023-09-01 12:13:19,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 286 flow [2023-09-01 12:13:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:13:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:13:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3998 transitions. [2023-09-01 12:13:19,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41438640132669985 [2023-09-01 12:13:19,807 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3998 transitions. [2023-09-01 12:13:19,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3998 transitions. [2023-09-01 12:13:19,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:19,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3998 transitions. [2023-09-01 12:13:19,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 666.3333333333334) internal successors, (3998), 6 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:19,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:19,827 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1608.0) internal successors, (11256), 7 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:19,827 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 132 flow. Second operand 6 states and 3998 transitions. [2023-09-01 12:13:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 286 flow [2023-09-01 12:13:19,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:19,829 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 222 flow [2023-09-01 12:13:19,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-09-01 12:13:19,830 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-09-01 12:13:19,830 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 222 flow [2023-09-01 12:13:19,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:19,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:19,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:19,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:13:20,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:20,038 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)] === [2023-09-01 12:13:20,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash 773664469, now seen corresponding path program 2 times [2023-09-01 12:13:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:20,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762806617] [2023-09-01 12:13:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:20,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:13:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:20,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762806617] [2023-09-01 12:13:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762806617] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086320169] [2023-09-01 12:13:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:13:20,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:20,211 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) [2023-09-01 12:13:20,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:13:20,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:13:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:13:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:13:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:13:21,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:13:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086320169] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:21,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:13:21,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-09-01 12:13:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890346313] [2023-09-01 12:13:21,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:13:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-09-01 12:13:21,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:21,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:21,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-09-01 12:13:21,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:22,607 INFO L130 PetriNetUnfolder]: 2934/4017 cut-off events. [2023-09-01 12:13:22,608 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 12:13:22,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8213 conditions, 4017 events. 2934/4017 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15676 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8125. Up to 3431 conditions per place. [2023-09-01 12:13:22,620 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 96 selfloop transitions, 2 changer transitions 7/105 dead transitions. [2023-09-01 12:13:22,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 536 flow [2023-09-01 12:13:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3289 transitions. [2023-09-01 12:13:22,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090796019900497 [2023-09-01 12:13:22,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3289 transitions. [2023-09-01 12:13:22,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3289 transitions. [2023-09-01 12:13:22,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:22,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3289 transitions. [2023-09-01 12:13:22,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 657.8) internal successors, (3289), 5 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:22,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:22,640 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:22,640 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 222 flow. Second operand 5 states and 3289 transitions. [2023-09-01 12:13:22,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 536 flow [2023-09-01 12:13:22,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 512 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:22,643 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 213 flow [2023-09-01 12:13:22,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-09-01 12:13:22,644 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-09-01 12:13:22,644 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 213 flow [2023-09-01 12:13:22,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:22,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:22,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:22,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 12:13:22,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 12:13:22,850 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)] === [2023-09-01 12:13:22,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1680310845, now seen corresponding path program 3 times [2023-09-01 12:13:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549440774] [2023-09-01 12:13:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:13:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549440774] [2023-09-01 12:13:23,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549440774] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:23,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679227892] [2023-09-01 12:13:23,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:13:23,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:23,008 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) [2023-09-01 12:13:23,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:13:23,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:13:23,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:13:23,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:13:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:13:23,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:13:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679227892] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:23,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:13:23,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-09-01 12:13:23,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940629475] [2023-09-01 12:13:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:13:24,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 639 out of 1608 [2023-09-01 12:13:24,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:24,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:24,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 639 of 1608 [2023-09-01 12:13:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:25,123 INFO L130 PetriNetUnfolder]: 3124/4357 cut-off events. [2023-09-01 12:13:25,124 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2023-09-01 12:13:25,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 4357 events. 3124/4357 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18094 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9371. Up to 3869 conditions per place. [2023-09-01 12:13:25,162 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 100 selfloop transitions, 3 changer transitions 7/110 dead transitions. [2023-09-01 12:13:25,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 555 flow [2023-09-01 12:13:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3293 transitions. [2023-09-01 12:13:25,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095771144278607 [2023-09-01 12:13:25,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3293 transitions. [2023-09-01 12:13:25,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3293 transitions. [2023-09-01 12:13:25,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:25,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3293 transitions. [2023-09-01 12:13:25,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.6) internal successors, (3293), 5 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:25,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:25,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:25,182 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 213 flow. Second operand 5 states and 3293 transitions. [2023-09-01 12:13:25,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 555 flow [2023-09-01 12:13:25,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 546 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 12:13:25,185 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 230 flow [2023-09-01 12:13:25,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-09-01 12:13:25,185 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-09-01 12:13:25,186 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 230 flow [2023-09-01 12:13:25,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.4) internal successors, (3217), 5 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:25,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:25,187 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:25,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:13:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:25,392 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)] === [2023-09-01 12:13:25,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257897, now seen corresponding path program 4 times [2023-09-01 12:13:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705716746] [2023-09-01 12:13:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:13:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705716746] [2023-09-01 12:13:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705716746] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904955793] [2023-09-01 12:13:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:13:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:25,497 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) [2023-09-01 12:13:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:13:25,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:13:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:13:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:13:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:13:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:13:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:13:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904955793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:13:25,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:13:25,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 12:13:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426276367] [2023-09-01 12:13:25,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:13:25,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:13:25,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:13:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:13:25,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 1608 [2023-09-01 12:13:25,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:25,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:25,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 1608 [2023-09-01 12:13:25,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:26,456 INFO L130 PetriNetUnfolder]: 3123/4352 cut-off events. [2023-09-01 12:13:26,457 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2023-09-01 12:13:26,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9913 conditions, 4352 events. 3123/4352 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17812 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 9879. Up to 4338 conditions per place. [2023-09-01 12:13:26,475 INFO L137 encePairwiseOnDemand]: 1601/1608 looper letters, 46 selfloop transitions, 18 changer transitions 0/64 dead transitions. [2023-09-01 12:13:26,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 376 flow [2023-09-01 12:13:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:13:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:13:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4650 transitions. [2023-09-01 12:13:26,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131130063965885 [2023-09-01 12:13:26,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4650 transitions. [2023-09-01 12:13:26,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4650 transitions. [2023-09-01 12:13:26,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:26,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4650 transitions. [2023-09-01 12:13:26,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 664.2857142857143) internal successors, (4650), 7 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:26,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:26,504 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1608.0) internal successors, (12864), 8 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:26,504 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 230 flow. Second operand 7 states and 4650 transitions. [2023-09-01 12:13:26,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 376 flow [2023-09-01 12:13:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 370 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:13:26,509 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 292 flow [2023-09-01 12:13:26,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-09-01 12:13:26,513 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-09-01 12:13:26,513 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 292 flow [2023-09-01 12:13:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 657.5384615384615) internal successors, (8548), 13 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:26,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:13:26,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:26,723 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)] === [2023-09-01 12:13:26,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash -472303414, now seen corresponding path program 5 times [2023-09-01 12:13:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:26,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520805906] [2023-09-01 12:13:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:26,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:27,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520805906] [2023-09-01 12:13:27,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520805906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:27,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:27,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:13:27,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309300857] [2023-09-01 12:13:27,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:13:27,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-09-01 12:13:27,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:27,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:27,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-09-01 12:13:27,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:28,331 INFO L130 PetriNetUnfolder]: 3772/5412 cut-off events. [2023-09-01 12:13:28,332 INFO L131 PetriNetUnfolder]: For 1184/1184 co-relation queries the response was YES. [2023-09-01 12:13:28,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 5412 events. 3772/5412 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25238 event pairs, 2135 based on Foata normal form. 1/4567 useless extension candidates. Maximal degree in co-relation 11782. Up to 4014 conditions per place. [2023-09-01 12:13:28,347 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 121 selfloop transitions, 14 changer transitions 4/139 dead transitions. [2023-09-01 12:13:28,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 751 flow [2023-09-01 12:13:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3297 transitions. [2023-09-01 12:13:28,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41007462686567164 [2023-09-01 12:13:28,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3297 transitions. [2023-09-01 12:13:28,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3297 transitions. [2023-09-01 12:13:28,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:28,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3297 transitions. [2023-09-01 12:13:28,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.4) internal successors, (3297), 5 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:28,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:28,365 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:28,365 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 292 flow. Second operand 5 states and 3297 transitions. [2023-09-01 12:13:28,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 751 flow [2023-09-01 12:13:28,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 139 transitions, 715 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 12:13:28,368 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 372 flow [2023-09-01 12:13:28,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-09-01 12:13:28,369 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2023-09-01 12:13:28,369 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 372 flow [2023-09-01 12:13:28,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:28,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:28,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:28,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:13:28,370 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)] === [2023-09-01 12:13:28,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash 952440716, now seen corresponding path program 6 times [2023-09-01 12:13:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:28,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245122167] [2023-09-01 12:13:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245122167] [2023-09-01 12:13:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245122167] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:28,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:13:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652891967] [2023-09-01 12:13:28,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:13:29,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-09-01 12:13:29,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:29,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:29,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-09-01 12:13:29,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:30,492 INFO L130 PetriNetUnfolder]: 7026/9920 cut-off events. [2023-09-01 12:13:30,492 INFO L131 PetriNetUnfolder]: For 6866/6866 co-relation queries the response was YES. [2023-09-01 12:13:30,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24933 conditions, 9920 events. 7026/9920 cut-off events. For 6866/6866 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 49525 event pairs, 1967 based on Foata normal form. 1/8697 useless extension candidates. Maximal degree in co-relation 24834. Up to 4768 conditions per place. [2023-09-01 12:13:30,521 INFO L137 encePairwiseOnDemand]: 1593/1608 looper letters, 127 selfloop transitions, 43 changer transitions 3/173 dead transitions. [2023-09-01 12:13:30,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 173 transitions, 1042 flow [2023-09-01 12:13:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3318 transitions. [2023-09-01 12:13:30,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126865671641791 [2023-09-01 12:13:30,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3318 transitions. [2023-09-01 12:13:30,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3318 transitions. [2023-09-01 12:13:30,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:30,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3318 transitions. [2023-09-01 12:13:30,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 663.6) internal successors, (3318), 5 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:30,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:30,538 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:30,538 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 372 flow. Second operand 5 states and 3318 transitions. [2023-09-01 12:13:30,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 173 transitions, 1042 flow [2023-09-01 12:13:30,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 173 transitions, 1031 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:30,547 INFO L231 Difference]: Finished difference. Result has 73 places, 106 transitions, 711 flow [2023-09-01 12:13:30,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=711, PETRI_PLACES=73, PETRI_TRANSITIONS=106} [2023-09-01 12:13:30,548 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-09-01 12:13:30,548 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 106 transitions, 711 flow [2023-09-01 12:13:30,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:30,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:30,549 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:30,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:13:30,549 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)] === [2023-09-01 12:13:30,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1010676078, now seen corresponding path program 7 times [2023-09-01 12:13:30,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:30,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304398881] [2023-09-01 12:13:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:30,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304398881] [2023-09-01 12:13:30,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304398881] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:30,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:30,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:13:30,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146263565] [2023-09-01 12:13:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:30,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:13:31,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1608 [2023-09-01 12:13:31,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 106 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:31,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:31,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1608 [2023-09-01 12:13:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:32,675 INFO L130 PetriNetUnfolder]: 7335/10386 cut-off events. [2023-09-01 12:13:32,675 INFO L131 PetriNetUnfolder]: For 16920/16920 co-relation queries the response was YES. [2023-09-01 12:13:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31791 conditions, 10386 events. 7335/10386 cut-off events. For 16920/16920 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 52628 event pairs, 3757 based on Foata normal form. 1/9053 useless extension candidates. Maximal degree in co-relation 31689. Up to 8786 conditions per place. [2023-09-01 12:13:32,716 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 167 selfloop transitions, 19 changer transitions 3/189 dead transitions. [2023-09-01 12:13:32,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 189 transitions, 1471 flow [2023-09-01 12:13:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3291 transitions. [2023-09-01 12:13:32,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40932835820895525 [2023-09-01 12:13:32,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3291 transitions. [2023-09-01 12:13:32,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3291 transitions. [2023-09-01 12:13:32,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:32,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3291 transitions. [2023-09-01 12:13:32,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 658.2) internal successors, (3291), 5 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:32,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:32,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:32,733 INFO L175 Difference]: Start difference. First operand has 73 places, 106 transitions, 711 flow. Second operand 5 states and 3291 transitions. [2023-09-01 12:13:32,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 189 transitions, 1471 flow [2023-09-01 12:13:32,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 189 transitions, 1453 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-09-01 12:13:32,769 INFO L231 Difference]: Finished difference. Result has 80 places, 122 transitions, 904 flow [2023-09-01 12:13:32,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=80, PETRI_TRANSITIONS=122} [2023-09-01 12:13:32,769 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2023-09-01 12:13:32,769 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 122 transitions, 904 flow [2023-09-01 12:13:32,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 639.4) internal successors, (3197), 5 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:32,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:32,770 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:13:32,771 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)] === [2023-09-01 12:13:32,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1354860510, now seen corresponding path program 8 times [2023-09-01 12:13:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233631921] [2023-09-01 12:13:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:32,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233631921] [2023-09-01 12:13:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233631921] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:13:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553668762] [2023-09-01 12:13:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:33,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:13:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:13:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:13:33,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 634 out of 1608 [2023-09-01 12:13:33,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 122 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 638.4) internal successors, (3192), 5 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:33,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:33,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 634 of 1608 [2023-09-01 12:13:33,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:35,126 INFO L130 PetriNetUnfolder]: 7800/11126 cut-off events. [2023-09-01 12:13:35,127 INFO L131 PetriNetUnfolder]: For 25716/25716 co-relation queries the response was YES. [2023-09-01 12:13:35,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 11126 events. 7800/11126 cut-off events. For 25716/25716 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57874 event pairs, 3450 based on Foata normal form. 1/9741 useless extension candidates. Maximal degree in co-relation 38799. Up to 8455 conditions per place. [2023-09-01 12:13:35,168 INFO L137 encePairwiseOnDemand]: 1596/1608 looper letters, 174 selfloop transitions, 40 changer transitions 4/218 dead transitions. [2023-09-01 12:13:35,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 218 transitions, 1838 flow [2023-09-01 12:13:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:13:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:13:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3301 transitions. [2023-09-01 12:13:35,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105721393034826 [2023-09-01 12:13:35,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3301 transitions. [2023-09-01 12:13:35,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3301 transitions. [2023-09-01 12:13:35,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:35,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3301 transitions. [2023-09-01 12:13:35,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 660.2) internal successors, (3301), 5 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:35,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:35,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:35,187 INFO L175 Difference]: Start difference. First operand has 80 places, 122 transitions, 904 flow. Second operand 5 states and 3301 transitions. [2023-09-01 12:13:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 218 transitions, 1838 flow [2023-09-01 12:13:35,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 218 transitions, 1816 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:35,245 INFO L231 Difference]: Finished difference. Result has 86 places, 145 transitions, 1288 flow [2023-09-01 12:13:35,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1288, PETRI_PLACES=86, PETRI_TRANSITIONS=145} [2023-09-01 12:13:35,246 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-09-01 12:13:35,246 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 145 transitions, 1288 flow [2023-09-01 12:13:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 638.4) internal successors, (3192), 5 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:35,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:35,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:35,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:13:35,247 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)] === [2023-09-01 12:13:35,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2050180737, now seen corresponding path program 1 times [2023-09-01 12:13:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:35,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661236420] [2023-09-01 12:13:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:35,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661236420] [2023-09-01 12:13:35,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661236420] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:35,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:35,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:35,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496914486] [2023-09-01 12:13:35,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:35,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:13:35,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:13:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:13:35,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:13:35,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 145 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:35,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:35,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:13:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:37,574 INFO L130 PetriNetUnfolder]: 9909/14036 cut-off events. [2023-09-01 12:13:37,575 INFO L131 PetriNetUnfolder]: For 48456/48456 co-relation queries the response was YES. [2023-09-01 12:13:37,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51285 conditions, 14036 events. 9909/14036 cut-off events. For 48456/48456 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 73262 event pairs, 4598 based on Foata normal form. 206/12412 useless extension candidates. Maximal degree in co-relation 51176. Up to 10987 conditions per place. [2023-09-01 12:13:37,632 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 192 selfloop transitions, 6 changer transitions 0/198 dead transitions. [2023-09-01 12:13:37,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 198 transitions, 2083 flow [2023-09-01 12:13:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:13:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:13:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2072 transitions. [2023-09-01 12:13:37,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295190713101161 [2023-09-01 12:13:37,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2072 transitions. [2023-09-01 12:13:37,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2072 transitions. [2023-09-01 12:13:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:37,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2072 transitions. [2023-09-01 12:13:37,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 690.6666666666666) internal successors, (2072), 3 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:37,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:37,641 INFO L175 Difference]: Start difference. First operand has 86 places, 145 transitions, 1288 flow. Second operand 3 states and 2072 transitions. [2023-09-01 12:13:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 198 transitions, 2083 flow [2023-09-01 12:13:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 2063 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:37,737 INFO L231 Difference]: Finished difference. Result has 88 places, 142 transitions, 1256 flow [2023-09-01 12:13:37,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1256, PETRI_PLACES=88, PETRI_TRANSITIONS=142} [2023-09-01 12:13:37,737 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2023-09-01 12:13:37,737 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 142 transitions, 1256 flow [2023-09-01 12:13:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:37,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:37,738 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:13:37,738 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)] === [2023-09-01 12:13:37,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 763817431, now seen corresponding path program 1 times [2023-09-01 12:13:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084124720] [2023-09-01 12:13:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:37,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:37,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084124720] [2023-09-01 12:13:37,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084124720] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:37,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:37,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:37,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894676002] [2023-09-01 12:13:37,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:13:37,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:13:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:13:37,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:13:37,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 142 transitions, 1256 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:37,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:37,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:13:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:40,204 INFO L130 PetriNetUnfolder]: 12294/17373 cut-off events. [2023-09-01 12:13:40,204 INFO L131 PetriNetUnfolder]: For 54974/54974 co-relation queries the response was YES. [2023-09-01 12:13:40,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64321 conditions, 17373 events. 12294/17373 cut-off events. For 54974/54974 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 92936 event pairs, 5850 based on Foata normal form. 0/15447 useless extension candidates. Maximal degree in co-relation 64211. Up to 14217 conditions per place. [2023-09-01 12:13:40,283 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 179 selfloop transitions, 9 changer transitions 0/188 dead transitions. [2023-09-01 12:13:40,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 188 transitions, 1949 flow [2023-09-01 12:13:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:13:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:13:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2023-09-01 12:13:40,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034825870646765 [2023-09-01 12:13:40,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2023-09-01 12:13:40,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2023-09-01 12:13:40,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:40,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2023-09-01 12:13:40,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:40,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:40,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:40,292 INFO L175 Difference]: Start difference. First operand has 88 places, 142 transitions, 1256 flow. Second operand 3 states and 2076 transitions. [2023-09-01 12:13:40,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 188 transitions, 1949 flow [2023-09-01 12:13:40,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 188 transitions, 1940 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:40,417 INFO L231 Difference]: Finished difference. Result has 90 places, 141 transitions, 1275 flow [2023-09-01 12:13:40,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1275, PETRI_PLACES=90, PETRI_TRANSITIONS=141} [2023-09-01 12:13:40,417 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2023-09-01 12:13:40,417 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 141 transitions, 1275 flow [2023-09-01 12:13:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:40,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:40,418 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:40,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 12:13:40,418 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)] === [2023-09-01 12:13:40,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash 937813535, now seen corresponding path program 1 times [2023-09-01 12:13:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091450520] [2023-09-01 12:13:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:40,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:40,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091450520] [2023-09-01 12:13:40,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091450520] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:40,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724130916] [2023-09-01 12:13:40,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:13:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:13:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:13:40,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 1608 [2023-09-01 12:13:40,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 141 transitions, 1275 flow. Second operand has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:40,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:40,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 1608 [2023-09-01 12:13:40,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:44,250 INFO L130 PetriNetUnfolder]: 17332/24411 cut-off events. [2023-09-01 12:13:44,250 INFO L131 PetriNetUnfolder]: For 81239/81239 co-relation queries the response was YES. [2023-09-01 12:13:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93256 conditions, 24411 events. 17332/24411 cut-off events. For 81239/81239 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 133043 event pairs, 8161 based on Foata normal form. 412/21791 useless extension candidates. Maximal degree in co-relation 93145. Up to 16188 conditions per place. [2023-09-01 12:13:44,377 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 182 selfloop transitions, 8 changer transitions 0/190 dead transitions. [2023-09-01 12:13:44,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 190 transitions, 2024 flow [2023-09-01 12:13:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:13:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:13:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2074 transitions. [2023-09-01 12:13:44,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-09-01 12:13:44,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2074 transitions. [2023-09-01 12:13:44,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2074 transitions. [2023-09-01 12:13:44,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:44,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2074 transitions. [2023-09-01 12:13:44,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 691.3333333333334) internal successors, (2074), 3 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:44,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:44,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1608.0) internal successors, (6432), 4 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:44,385 INFO L175 Difference]: Start difference. First operand has 90 places, 141 transitions, 1275 flow. Second operand 3 states and 2074 transitions. [2023-09-01 12:13:44,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 190 transitions, 2024 flow [2023-09-01 12:13:44,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 190 transitions, 1995 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:44,556 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1237 flow [2023-09-01 12:13:44,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1237, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2023-09-01 12:13:44,557 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-09-01 12:13:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1237 flow [2023-09-01 12:13:44,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:44,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 12:13:44,558 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)] === [2023-09-01 12:13:44,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 146834425, now seen corresponding path program 1 times [2023-09-01 12:13:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154386261] [2023-09-01 12:13:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:13:44,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154386261] [2023-09-01 12:13:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154386261] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:44,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:44,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:44,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884420637] [2023-09-01 12:13:44,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:44,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:13:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:13:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:13:44,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:13:44,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1237 flow. Second operand has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:44,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:44,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:13:44,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:48,446 INFO L130 PetriNetUnfolder]: 17806/25153 cut-off events. [2023-09-01 12:13:48,446 INFO L131 PetriNetUnfolder]: For 79892/79892 co-relation queries the response was YES. [2023-09-01 12:13:48,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95789 conditions, 25153 events. 17806/25153 cut-off events. For 79892/79892 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 142677 event pairs, 4930 based on Foata normal form. 4/21961 useless extension candidates. Maximal degree in co-relation 95677. Up to 22762 conditions per place. [2023-09-01 12:13:48,566 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 166 selfloop transitions, 11 changer transitions 29/206 dead transitions. [2023-09-01 12:13:48,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 206 transitions, 2100 flow [2023-09-01 12:13:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:13:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:13:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2735 transitions. [2023-09-01 12:13:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252176616915423 [2023-09-01 12:13:48,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2735 transitions. [2023-09-01 12:13:48,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2735 transitions. [2023-09-01 12:13:48,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:48,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2735 transitions. [2023-09-01 12:13:48,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.75) internal successors, (2735), 4 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:48,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:48,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:48,576 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1237 flow. Second operand 4 states and 2735 transitions. [2023-09-01 12:13:48,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 206 transitions, 2100 flow [2023-09-01 12:13:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 206 transitions, 2084 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:13:48,707 INFO L231 Difference]: Finished difference. Result has 97 places, 143 transitions, 1338 flow [2023-09-01 12:13:48,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1338, PETRI_PLACES=97, PETRI_TRANSITIONS=143} [2023-09-01 12:13:48,708 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2023-09-01 12:13:48,708 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 143 transitions, 1338 flow [2023-09-01 12:13:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:48,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:48,709 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:48,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 12:13:48,709 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)] === [2023-09-01 12:13:48,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1281119567, now seen corresponding path program 2 times [2023-09-01 12:13:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109699073] [2023-09-01 12:13:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:13:48,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:48,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109699073] [2023-09-01 12:13:48,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109699073] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:13:48,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:13:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:13:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646238238] [2023-09-01 12:13:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:13:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:13:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:13:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:13:48,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:13:48,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 143 transitions, 1338 flow. Second operand has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:48,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:48,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:13:48,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:52,140 INFO L130 PetriNetUnfolder]: 16909/23851 cut-off events. [2023-09-01 12:13:52,140 INFO L131 PetriNetUnfolder]: For 77336/77336 co-relation queries the response was YES. [2023-09-01 12:13:52,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90507 conditions, 23851 events. 16909/23851 cut-off events. For 77336/77336 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 131000 event pairs, 10297 based on Foata normal form. 5/20840 useless extension candidates. Maximal degree in co-relation 90439. Up to 21826 conditions per place. [2023-09-01 12:13:52,280 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 155 selfloop transitions, 4 changer transitions 37/196 dead transitions. [2023-09-01 12:13:52,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 196 transitions, 1991 flow [2023-09-01 12:13:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:13:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:13:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2733 transitions. [2023-09-01 12:13:52,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42490671641791045 [2023-09-01 12:13:52,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2733 transitions. [2023-09-01 12:13:52,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2733 transitions. [2023-09-01 12:13:52,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:52,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2733 transitions. [2023-09-01 12:13:52,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 683.25) internal successors, (2733), 4 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:52,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:52,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:52,290 INFO L175 Difference]: Start difference. First operand has 97 places, 143 transitions, 1338 flow. Second operand 4 states and 2733 transitions. [2023-09-01 12:13:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 196 transitions, 1991 flow [2023-09-01 12:13:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 196 transitions, 1976 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:13:52,445 INFO L231 Difference]: Finished difference. Result has 98 places, 131 transitions, 1196 flow [2023-09-01 12:13:52,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1196, PETRI_PLACES=98, PETRI_TRANSITIONS=131} [2023-09-01 12:13:52,446 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-09-01 12:13:52,446 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 131 transitions, 1196 flow [2023-09-01 12:13:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:52,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:52,447 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:52,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 12:13:52,447 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)] === [2023-09-01 12:13:52,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash -244449536, now seen corresponding path program 1 times [2023-09-01 12:13:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:52,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697983236] [2023-09-01 12:13:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697983236] [2023-09-01 12:13:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697983236] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832045922] [2023-09-01 12:13:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:52,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:52,778 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) [2023-09-01 12:13:52,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:13:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:13:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:53,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:13:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:53,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832045922] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:13:53,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:13:53,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2023-09-01 12:13:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608346593] [2023-09-01 12:13:53,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:13:53,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:13:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:13:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:13:53,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 638 out of 1608 [2023-09-01 12:13:53,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 131 transitions, 1196 flow. Second operand has 9 states, 9 states have (on average 645.6666666666666) internal successors, (5811), 9 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:53,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:53,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 638 of 1608 [2023-09-01 12:13:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:57,063 INFO L130 PetriNetUnfolder]: 17414/24697 cut-off events. [2023-09-01 12:13:57,063 INFO L131 PetriNetUnfolder]: For 77476/77476 co-relation queries the response was YES. [2023-09-01 12:13:57,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93462 conditions, 24697 events. 17414/24697 cut-off events. For 77476/77476 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 137965 event pairs, 3924 based on Foata normal form. 4/21597 useless extension candidates. Maximal degree in co-relation 93391. Up to 11141 conditions per place. [2023-09-01 12:13:57,194 INFO L137 encePairwiseOnDemand]: 1594/1608 looper letters, 259 selfloop transitions, 62 changer transitions 35/356 dead transitions. [2023-09-01 12:13:57,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 356 transitions, 3292 flow [2023-09-01 12:13:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:13:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:13:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 9176 transitions. [2023-09-01 12:13:57,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076048329779673 [2023-09-01 12:13:57,205 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 9176 transitions. [2023-09-01 12:13:57,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 9176 transitions. [2023-09-01 12:13:57,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:57,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 9176 transitions. [2023-09-01 12:13:57,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 655.4285714285714) internal successors, (9176), 14 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:57,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1608.0) internal successors, (24120), 15 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:57,223 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1608.0) internal successors, (24120), 15 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:57,223 INFO L175 Difference]: Start difference. First operand has 98 places, 131 transitions, 1196 flow. Second operand 14 states and 9176 transitions. [2023-09-01 12:13:57,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 356 transitions, 3292 flow [2023-09-01 12:13:57,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 356 transitions, 3250 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-09-01 12:13:57,431 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1745 flow [2023-09-01 12:13:57,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1745, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2023-09-01 12:13:57,431 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 66 predicate places. [2023-09-01 12:13:57,431 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1745 flow [2023-09-01 12:13:57,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 645.6666666666666) internal successors, (5811), 9 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:57,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:13:57,432 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:13:57,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:13:57,636 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,SelfDestructingSolverStorable14 [2023-09-01 12:13:57,637 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)] === [2023-09-01 12:13:57,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:13:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash 939975353, now seen corresponding path program 1 times [2023-09-01 12:13:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:13:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469750740] [2023-09-01 12:13:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:13:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:57,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:13:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469750740] [2023-09-01 12:13:57,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469750740] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:13:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429294603] [2023-09-01 12:13:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:13:57,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:13:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:13:57,812 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) [2023-09-01 12:13:57,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:13:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:13:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:13:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:13:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:58,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:13:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:13:58,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429294603] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:13:58,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:13:58,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 12:13:58,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564851829] [2023-09-01 12:13:58,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:13:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:13:58,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:13:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:13:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 12:13:58,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:13:58,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1745 flow. Second operand has 6 states, 6 states have (on average 667.6666666666666) internal successors, (4006), 6 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:58,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:13:58,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:13:58,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:01,649 INFO L130 PetriNetUnfolder]: 17516/24962 cut-off events. [2023-09-01 12:14:01,649 INFO L131 PetriNetUnfolder]: For 100253/100253 co-relation queries the response was YES. [2023-09-01 12:14:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98038 conditions, 24962 events. 17516/24962 cut-off events. For 100253/100253 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 141460 event pairs, 3642 based on Foata normal form. 3/21839 useless extension candidates. Maximal degree in co-relation 97966. Up to 20872 conditions per place. [2023-09-01 12:14:01,807 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 149 selfloop transitions, 12 changer transitions 63/224 dead transitions. [2023-09-01 12:14:01,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 224 transitions, 2603 flow [2023-09-01 12:14:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:14:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:14:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2741 transitions. [2023-09-01 12:14:01,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42615049751243783 [2023-09-01 12:14:01,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2741 transitions. [2023-09-01 12:14:01,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2741 transitions. [2023-09-01 12:14:01,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:01,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2741 transitions. [2023-09-01 12:14:01,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 685.25) internal successors, (2741), 4 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:01,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:01,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:01,817 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1745 flow. Second operand 4 states and 2741 transitions. [2023-09-01 12:14:01,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 224 transitions, 2603 flow [2023-09-01 12:14:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 224 transitions, 2533 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-09-01 12:14:02,248 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1435 flow [2023-09-01 12:14:02,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1435, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2023-09-01 12:14:02,249 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2023-09-01 12:14:02,249 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1435 flow [2023-09-01 12:14:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 667.6666666666666) internal successors, (4006), 6 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:02,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:14:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:14:02,457 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)] === [2023-09-01 12:14:02,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2101200279, now seen corresponding path program 2 times [2023-09-01 12:14:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:02,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521912491] [2023-09-01 12:14:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:14:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:02,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521912491] [2023-09-01 12:14:02,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521912491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:02,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:02,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:14:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458383675] [2023-09-01 12:14:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:02,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:14:02,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:14:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:14:02,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 660 out of 1608 [2023-09-01 12:14:02,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1435 flow. Second operand has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:02,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:02,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 660 of 1608 [2023-09-01 12:14:02,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:05,779 INFO L130 PetriNetUnfolder]: 15133/21478 cut-off events. [2023-09-01 12:14:05,780 INFO L131 PetriNetUnfolder]: For 79389/79389 co-relation queries the response was YES. [2023-09-01 12:14:05,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80846 conditions, 21478 events. 15133/21478 cut-off events. For 79389/79389 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 117789 event pairs, 8830 based on Foata normal form. 4/18652 useless extension candidates. Maximal degree in co-relation 80784. Up to 18757 conditions per place. [2023-09-01 12:14:05,880 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 128 selfloop transitions, 3 changer transitions 58/189 dead transitions. [2023-09-01 12:14:05,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 2126 flow [2023-09-01 12:14:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:14:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:14:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2737 transitions. [2023-09-01 12:14:05,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552860696517414 [2023-09-01 12:14:05,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2737 transitions. [2023-09-01 12:14:05,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2737 transitions. [2023-09-01 12:14:05,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:05,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2737 transitions. [2023-09-01 12:14:05,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 684.25) internal successors, (2737), 4 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:05,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:05,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:05,889 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1435 flow. Second operand 4 states and 2737 transitions. [2023-09-01 12:14:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 2126 flow [2023-09-01 12:14:05,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2056 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-09-01 12:14:05,997 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1011 flow [2023-09-01 12:14:05,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1011, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2023-09-01 12:14:05,998 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2023-09-01 12:14:05,998 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1011 flow [2023-09-01 12:14:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 667.5) internal successors, (2670), 4 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:05,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:05,998 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:05,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 12:14:05,999 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)] === [2023-09-01 12:14:05,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2049052014, now seen corresponding path program 2 times [2023-09-01 12:14:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476853747] [2023-09-01 12:14:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:14:06,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476853747] [2023-09-01 12:14:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476853747] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:06,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:06,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:14:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483827807] [2023-09-01 12:14:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:06,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:14:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:14:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:14:06,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 1608 [2023-09-01 12:14:06,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1011 flow. Second operand has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:06,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:06,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 1608 [2023-09-01 12:14:06,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:09,326 INFO L130 PetriNetUnfolder]: 13744/19200 cut-off events. [2023-09-01 12:14:09,326 INFO L131 PetriNetUnfolder]: For 60014/60014 co-relation queries the response was YES. [2023-09-01 12:14:09,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71251 conditions, 19200 events. 13744/19200 cut-off events. For 60014/60014 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 99419 event pairs, 3970 based on Foata normal form. 1/16577 useless extension candidates. Maximal degree in co-relation 71215. Up to 10228 conditions per place. [2023-09-01 12:14:09,431 INFO L137 encePairwiseOnDemand]: 1598/1608 looper letters, 140 selfloop transitions, 30 changer transitions 21/191 dead transitions. [2023-09-01 12:14:09,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 191 transitions, 1813 flow [2023-09-01 12:14:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:14:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:14:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3356 transitions. [2023-09-01 12:14:09,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174129353233831 [2023-09-01 12:14:09,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3356 transitions. [2023-09-01 12:14:09,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3356 transitions. [2023-09-01 12:14:09,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:09,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3356 transitions. [2023-09-01 12:14:09,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 671.2) internal successors, (3356), 5 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:09,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:09,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:09,442 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1011 flow. Second operand 5 states and 3356 transitions. [2023-09-01 12:14:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 191 transitions, 1813 flow [2023-09-01 12:14:09,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 191 transitions, 1682 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-09-01 12:14:09,601 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 1055 flow [2023-09-01 12:14:09,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1055, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2023-09-01 12:14:09,602 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 56 predicate places. [2023-09-01 12:14:09,602 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 1055 flow [2023-09-01 12:14:09,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:09,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:09,602 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:09,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 12:14:09,602 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)] === [2023-09-01 12:14:09,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1385030174, now seen corresponding path program 3 times [2023-09-01 12:14:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002010313] [2023-09-01 12:14:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:14:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002010313] [2023-09-01 12:14:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002010313] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:09,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:09,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:14:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901547746] [2023-09-01 12:14:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:09,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:14:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:14:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:14:09,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 646 out of 1608 [2023-09-01 12:14:09,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 115 transitions, 1055 flow. Second operand has 5 states, 5 states have (on average 652.0) internal successors, (3260), 5 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:09,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:09,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 646 of 1608 [2023-09-01 12:14:09,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:12,668 INFO L130 PetriNetUnfolder]: 13803/19295 cut-off events. [2023-09-01 12:14:12,668 INFO L131 PetriNetUnfolder]: For 54068/54068 co-relation queries the response was YES. [2023-09-01 12:14:12,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70466 conditions, 19295 events. 13803/19295 cut-off events. For 54068/54068 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 100053 event pairs, 4074 based on Foata normal form. 3/16634 useless extension candidates. Maximal degree in co-relation 70433. Up to 10414 conditions per place. [2023-09-01 12:14:12,768 INFO L137 encePairwiseOnDemand]: 1597/1608 looper letters, 141 selfloop transitions, 29 changer transitions 10/180 dead transitions. [2023-09-01 12:14:12,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1718 flow [2023-09-01 12:14:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:14:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:14:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3341 transitions. [2023-09-01 12:14:12,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41554726368159206 [2023-09-01 12:14:12,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3341 transitions. [2023-09-01 12:14:12,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3341 transitions. [2023-09-01 12:14:12,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:12,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3341 transitions. [2023-09-01 12:14:12,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 668.2) internal successors, (3341), 5 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:12,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:12,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1608.0) internal successors, (9648), 6 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:12,779 INFO L175 Difference]: Start difference. First operand has 102 places, 115 transitions, 1055 flow. Second operand 5 states and 3341 transitions. [2023-09-01 12:14:12,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1718 flow [2023-09-01 12:14:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 180 transitions, 1672 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-09-01 12:14:12,896 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 1027 flow [2023-09-01 12:14:12,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1027, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2023-09-01 12:14:12,897 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-09-01 12:14:12,897 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 1027 flow [2023-09-01 12:14:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 652.0) internal successors, (3260), 5 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:12,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:12,898 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 12:14:12,898 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)] === [2023-09-01 12:14:12,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1385637435, now seen corresponding path program 1 times [2023-09-01 12:14:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327864490] [2023-09-01 12:14:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 12:14:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:13,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327864490] [2023-09-01 12:14:13,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327864490] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:13,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:13,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:14:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406555940] [2023-09-01 12:14:13,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:13,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:14:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:14:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:14:13,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-09-01 12:14:13,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 1027 flow. Second operand has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:13,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:13,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-09-01 12:14:13,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:15,782 INFO L130 PetriNetUnfolder]: 13589/18915 cut-off events. [2023-09-01 12:14:15,782 INFO L131 PetriNetUnfolder]: For 68131/68131 co-relation queries the response was YES. [2023-09-01 12:14:15,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76499 conditions, 18915 events. 13589/18915 cut-off events. For 68131/68131 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 96930 event pairs, 8294 based on Foata normal form. 34/16323 useless extension candidates. Maximal degree in co-relation 76466. Up to 18039 conditions per place. [2023-09-01 12:14:15,886 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 133 selfloop transitions, 6 changer transitions 3/142 dead transitions. [2023-09-01 12:14:15,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1435 flow [2023-09-01 12:14:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:14:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:14:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2722 transitions. [2023-09-01 12:14:15,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319651741293535 [2023-09-01 12:14:15,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2722 transitions. [2023-09-01 12:14:15,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2722 transitions. [2023-09-01 12:14:15,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:15,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2722 transitions. [2023-09-01 12:14:15,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.5) internal successors, (2722), 4 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:15,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:15,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:15,895 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 1027 flow. Second operand 4 states and 2722 transitions. [2023-09-01 12:14:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1435 flow [2023-09-01 12:14:16,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 1312 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-09-01 12:14:16,048 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 900 flow [2023-09-01 12:14:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=900, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2023-09-01 12:14:16,048 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-09-01 12:14:16,049 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 900 flow [2023-09-01 12:14:16,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:16,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:16,049 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:16,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 12:14:16,050 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)] === [2023-09-01 12:14:16,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1997501473, now seen corresponding path program 2 times [2023-09-01 12:14:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010568097] [2023-09-01 12:14:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 12:14:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:16,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010568097] [2023-09-01 12:14:16,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010568097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:16,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:16,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:14:16,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124355973] [2023-09-01 12:14:16,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:16,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:14:16,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:14:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:14:16,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 662 out of 1608 [2023-09-01 12:14:16,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 900 flow. Second operand has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:16,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:16,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 662 of 1608 [2023-09-01 12:14:16,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:18,962 INFO L130 PetriNetUnfolder]: 13367/18525 cut-off events. [2023-09-01 12:14:18,962 INFO L131 PetriNetUnfolder]: For 51781/51781 co-relation queries the response was YES. [2023-09-01 12:14:19,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70249 conditions, 18525 events. 13367/18525 cut-off events. For 51781/51781 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 93742 event pairs, 8230 based on Foata normal form. 6/15959 useless extension candidates. Maximal degree in co-relation 70220. Up to 18039 conditions per place. [2023-09-01 12:14:19,062 INFO L137 encePairwiseOnDemand]: 1605/1608 looper letters, 129 selfloop transitions, 1 changer transitions 8/138 dead transitions. [2023-09-01 12:14:19,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1277 flow [2023-09-01 12:14:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:14:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:14:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2720 transitions. [2023-09-01 12:14:19,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228855721393035 [2023-09-01 12:14:19,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2720 transitions. [2023-09-01 12:14:19,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2720 transitions. [2023-09-01 12:14:19,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:19,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2720 transitions. [2023-09-01 12:14:19,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:19,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:19,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:19,075 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 900 flow. Second operand 4 states and 2720 transitions. [2023-09-01 12:14:19,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1277 flow [2023-09-01 12:14:19,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 1275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:14:19,182 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 840 flow [2023-09-01 12:14:19,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2023-09-01 12:14:19,182 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-09-01 12:14:19,183 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 840 flow [2023-09-01 12:14:19,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:19,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:19,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 12:14:19,183 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)] === [2023-09-01 12:14:19,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1082557347, now seen corresponding path program 3 times [2023-09-01 12:14:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:19,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312834311] [2023-09-01 12:14:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:14:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:19,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312834311] [2023-09-01 12:14:19,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312834311] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:14:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:14:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:14:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970068604] [2023-09-01 12:14:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:14:19,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:14:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:14:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:14:19,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 663 out of 1608 [2023-09-01 12:14:19,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 840 flow. Second operand has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:19,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:19,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 663 of 1608 [2023-09-01 12:14:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:21,961 INFO L130 PetriNetUnfolder]: 13084/18059 cut-off events. [2023-09-01 12:14:21,961 INFO L131 PetriNetUnfolder]: For 48835/48835 co-relation queries the response was YES. [2023-09-01 12:14:22,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 18059 events. 13084/18059 cut-off events. For 48835/48835 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 90097 event pairs, 2975 based on Foata normal form. 10/15587 useless extension candidates. Maximal degree in co-relation 68418. Up to 17847 conditions per place. [2023-09-01 12:14:22,071 INFO L137 encePairwiseOnDemand]: 1604/1608 looper letters, 111 selfloop transitions, 4 changer transitions 7/122 dead transitions. [2023-09-01 12:14:22,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 1099 flow [2023-09-01 12:14:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:14:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:14:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2719 transitions. [2023-09-01 12:14:22,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227300995024876 [2023-09-01 12:14:22,073 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2719 transitions. [2023-09-01 12:14:22,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2719 transitions. [2023-09-01 12:14:22,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:14:22,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2719 transitions. [2023-09-01 12:14:22,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 679.75) internal successors, (2719), 4 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:22,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:22,079 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1608.0) internal successors, (8040), 5 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:22,079 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 840 flow. Second operand 4 states and 2719 transitions. [2023-09-01 12:14:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 1099 flow [2023-09-01 12:14:22,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1041 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 12:14:22,333 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 694 flow [2023-09-01 12:14:22,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=694, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2023-09-01 12:14:22,333 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-09-01 12:14:22,333 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 694 flow [2023-09-01 12:14:22,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 671.0) internal successors, (2684), 4 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:22,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:14:22,334 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:14:22,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 12:14:22,334 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)] === [2023-09-01 12:14:22,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:14:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash 275559464, now seen corresponding path program 1 times [2023-09-01 12:14:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:14:22,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89900101] [2023-09-01 12:14:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:22,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:14:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:14:24,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:14:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89900101] [2023-09-01 12:14:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89900101] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:14:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185584183] [2023-09-01 12:14:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:14:24,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:14:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:14:24,229 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) [2023-09-01 12:14:24,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:14:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:14:24,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:14:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:14:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:14:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-09-01 12:14:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:14:25,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:14:26,667 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (forall ((~ends_with_6~0.base Int) (v_ArrVal_1507 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507) ~ends_with_6~0.base) c_~ends_with_6~0.offset) 256))))) (and (forall ((v_ArrVal_1507 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507))) (or (= (mod (select (select .cse0 c_~ends_with_2~0.base) (+ c_~i_13~0 c_~ends_with_2~0.offset)) 256) 0) (forall ((~ends_with_6~0.base Int)) (< 0 (mod (select (select .cse0 ~ends_with_6~0.base) c_~ends_with_6~0.offset) 256)))))) (or (< c_~i_13~0 4) .cse1) (or (= (mod (mod c_~break_14~0 256) 4294967296) 0) .cse1) (forall ((~ends_with_6~0.base Int) (v_ArrVal_1507 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1507) ~ends_with_6~0.base))) (or (= (mod (select .cse2 (+ c_~i_13~0 c_~ends_with_6~0.offset)) 256) 0) (< 0 (mod (select .cse2 c_~ends_with_6~0.offset) 256))))))) is different from false [2023-09-01 12:14:26,956 INFO L321 Elim1Store]: treesize reduction 11, result has 83.1 percent of original size [2023-09-01 12:14:26,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 158 [2023-09-01 12:14:26,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:14:26,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 93 [2023-09-01 12:14:26,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:14:26,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 85 [2023-09-01 12:14:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:14:27,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185584183] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:14:27,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:14:27,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 39 [2023-09-01 12:14:27,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798321468] [2023-09-01 12:14:27,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:14:27,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 12:14:27,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:14:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 12:14:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1292, Unknown=5, NotChecked=74, Total=1560 [2023-09-01 12:14:27,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 1608 [2023-09-01 12:14:27,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 694 flow. Second operand has 40 states, 40 states have (on average 532.75) internal successors, (21310), 40 states have internal predecessors, (21310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:14:27,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:14:27,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 1608 [2023-09-01 12:14:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:14:30,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:14:32,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:14:35,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:14:37,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:14:42,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:15:04,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:15:16,869 INFO L130 PetriNetUnfolder]: 84937/117506 cut-off events. [2023-09-01 12:15:16,870 INFO L131 PetriNetUnfolder]: For 223705/223705 co-relation queries the response was YES. [2023-09-01 12:15:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428478 conditions, 117506 events. 84937/117506 cut-off events. For 223705/223705 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 762522 event pairs, 6725 based on Foata normal form. 9/100430 useless extension candidates. Maximal degree in co-relation 428451. Up to 31160 conditions per place. [2023-09-01 12:15:17,768 INFO L137 encePairwiseOnDemand]: 1575/1608 looper letters, 2058 selfloop transitions, 685 changer transitions 555/3298 dead transitions. [2023-09-01 12:15:17,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 3298 transitions, 26913 flow [2023-09-01 12:15:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-09-01 12:15:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2023-09-01 12:15:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 75785 transitions. [2023-09-01 12:15:17,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390645692401303 [2023-09-01 12:15:17,813 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 75785 transitions. [2023-09-01 12:15:17,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 75785 transitions. [2023-09-01 12:15:17,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:17,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 75785 transitions. [2023-09-01 12:15:17,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 545.2158273381295) internal successors, (75785), 139 states have internal predecessors, (75785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:17,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 1608.0) internal successors, (225120), 140 states have internal predecessors, (225120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:18,007 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 1608.0) internal successors, (225120), 140 states have internal predecessors, (225120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:18,007 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 694 flow. Second operand 139 states and 75785 transitions. [2023-09-01 12:15:18,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 3298 transitions, 26913 flow [2023-09-01 12:15:33,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 3298 transitions, 26537 flow, removed 164 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:33,841 INFO L231 Difference]: Finished difference. Result has 322 places, 860 transitions, 8925 flow [2023-09-01 12:15:33,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1608, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=8925, PETRI_PLACES=322, PETRI_TRANSITIONS=860} [2023-09-01 12:15:33,842 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 276 predicate places. [2023-09-01 12:15:33,842 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 860 transitions, 8925 flow [2023-09-01 12:15:33,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 532.75) internal successors, (21310), 40 states have internal predecessors, (21310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:33,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:33,845 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:33,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:15:34,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:34,046 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)] === [2023-09-01 12:15:34,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash -923697284, now seen corresponding path program 2 times [2023-09-01 12:15:34,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:34,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360437831] [2023-09-01 12:15:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 12:15:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360437831] [2023-09-01 12:15:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360437831] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948176526] [2023-09-01 12:15:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:15:35,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:35,955 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) [2023-09-01 12:15:35,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:15:36,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:15:36,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:15:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:15:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:15:37,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-09-01 12:15:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:15:37,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:15:41,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:15:41,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 444 Killed by 15