./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.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 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:44:04,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:44:04,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:44:04,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:44:04,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:44:04,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:44:04,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:44:04,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:44:04,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:44:04,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:44:04,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:44:04,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:44:04,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:44:04,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:44:04,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:44:04,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:44:04,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:44:04,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:44:04,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:44:04,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:44:04,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:44:04,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:44:04,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:44:04,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:44:04,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:44:04,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:44:04,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:44:04,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:44:04,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:44:04,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:44:04,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:44:04,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:44:04,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:44:04,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:44:04,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:44:04,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:44:04,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:44:04,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:44:04,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:44:04,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:44:04,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:44:04,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:44:04,730 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:44:04,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:44:04,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:44:04,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:44:04,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:44:04,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:44:04,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:44:04,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:44:04,733 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:44:04,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:44:04,733 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:44:04,734 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:44:04,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:44:04,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:44:04,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:44:04,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:44:04,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:44:04,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:44:04,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:44:04,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:44:04,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:44:04,737 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:44:04,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:44:04,737 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:44:04,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:44:04,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:44:04,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:44:05,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:44:05,002 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:44:05,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:44:05,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-08-31 01:44:05,966 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:44:06,129 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:44:06,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-08-31 01:44:06,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e825e49a/bb21403c63aa4545a7cd4da25861e864/FLAG8c2bb58b0 [2023-08-31 01:44:06,146 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e825e49a/bb21403c63aa4545a7cd4da25861e864 [2023-08-31 01:44:06,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:44:06,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:44:06,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:44:06,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:44:06,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:44:06,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b67034c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06, skipping insertion in model container [2023-08-31 01:44:06,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:44:06,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:44:06,282 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/mult-flipped-dist.wvr.c[2135,2148] [2023-08-31 01:44:06,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:44:06,291 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:44:06,303 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/mult-flipped-dist.wvr.c[2135,2148] [2023-08-31 01:44:06,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:44:06,322 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:44:06,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06 WrapperNode [2023-08-31 01:44:06,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:44:06,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:44:06,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:44:06,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:44:06,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,345 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-08-31 01:44:06,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:44:06,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:44:06,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:44:06,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:44:06,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:44:06,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:44:06,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:44:06,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:44:06,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (1/1) ... [2023-08-31 01:44:06,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:44:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:06,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:44:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:44:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:44:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:44:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:44:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:44:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:44:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:44:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:44:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:44:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:44:06,434 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:44:06,501 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:44:06,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:44:06,636 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:44:06,641 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:44:06,642 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 01:44:06,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:44:06 BoogieIcfgContainer [2023-08-31 01:44:06,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:44:06,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:44:06,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:44:06,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:44:06,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:44:06" (1/3) ... [2023-08-31 01:44:06,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65520b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:44:06, skipping insertion in model container [2023-08-31 01:44:06,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:44:06" (2/3) ... [2023-08-31 01:44:06,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65520b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:44:06, skipping insertion in model container [2023-08-31 01:44:06,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:44:06" (3/3) ... [2023-08-31 01:44:06,668 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-08-31 01:44:06,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:44:06,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:44:06,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:44:06,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:44:06,751 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:44:06,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2023-08-31 01:44:06,846 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-08-31 01:44:06,846 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:44:06,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-31 01:44:06,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2023-08-31 01:44:06,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 202 flow [2023-08-31 01:44:06,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:44:06,868 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-31 01:44:06,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 202 flow [2023-08-31 01:44:06,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 202 flow [2023-08-31 01:44:06,887 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-08-31 01:44:06,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:44:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-31 01:44:06,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-31 01:44:08,788 INFO L134 LiptonReduction]: Checked pairs total: 1312 [2023-08-31 01:44:08,788 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-31 01:44:08,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:44:08,810 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;@4142e1fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:44:08,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:44:08,821 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-31 01:44:08,821 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:44:08,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:08,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:08,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:08,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1620298547, now seen corresponding path program 1 times [2023-08-31 01:44:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645808621] [2023-08-31 01:44:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645808621] [2023-08-31 01:44:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645808621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:09,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:09,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 01:44:09,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244217618] [2023-08-31 01:44:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:09,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:44:09,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:44:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:44:09,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 181 [2023-08-31 01:44:09,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:09,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 181 [2023-08-31 01:44:09,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:09,475 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2023-08-31 01:44:09,476 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-31 01:44:09,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1602 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-31 01:44:09,482 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-08-31 01:44:09,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-08-31 01:44:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:44:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:44:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-31 01:44:09,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569060773480663 [2023-08-31 01:44:09,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-31 01:44:09,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-31 01:44:09,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:09,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-31 01:44:09,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,509 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 309 transitions. [2023-08-31 01:44:09,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-08-31 01:44:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:44:09,514 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-08-31 01:44:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-31 01:44:09,517 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-08-31 01:44:09,518 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-08-31 01:44:09,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:09,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:09,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:44:09,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:09,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash -622319524, now seen corresponding path program 1 times [2023-08-31 01:44:09,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148018111] [2023-08-31 01:44:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148018111] [2023-08-31 01:44:09,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148018111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:09,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:44:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880281738] [2023-08-31 01:44:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:09,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:44:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:44:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:44:09,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:09,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:09,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:09,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:09,861 INFO L130 PetriNetUnfolder]: 486/764 cut-off events. [2023-08-31 01:44:09,861 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-08-31 01:44:09,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 764 events. 486/764 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3182 event pairs, 137 based on Foata normal form. 68/826 useless extension candidates. Maximal degree in co-relation 420. Up to 391 conditions per place. [2023-08-31 01:44:09,864 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2023-08-31 01:44:09,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 62 transitions, 298 flow [2023-08-31 01:44:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:44:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:44:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2023-08-31 01:44:09,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-08-31 01:44:09,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2023-08-31 01:44:09,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2023-08-31 01:44:09,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:09,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2023-08-31 01:44:09,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,869 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 480 transitions. [2023-08-31 01:44:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 62 transitions, 298 flow [2023-08-31 01:44:09,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:09,871 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 119 flow [2023-08-31 01:44:09,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-31 01:44:09,871 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-31 01:44:09,872 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 119 flow [2023-08-31 01:44:09,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:09,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:44:09,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:09,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1535831546, now seen corresponding path program 2 times [2023-08-31 01:44:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764525914] [2023-08-31 01:44:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764525914] [2023-08-31 01:44:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764525914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:09,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:09,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:44:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932393466] [2023-08-31 01:44:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:44:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:44:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:44:09,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-31 01:44:09,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:09,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:09,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-31 01:44:09,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:10,048 INFO L130 PetriNetUnfolder]: 469/738 cut-off events. [2023-08-31 01:44:10,048 INFO L131 PetriNetUnfolder]: For 864/985 co-relation queries the response was YES. [2023-08-31 01:44:10,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 738 events. 469/738 cut-off events. For 864/985 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3069 event pairs, 103 based on Foata normal form. 124/839 useless extension candidates. Maximal degree in co-relation 842. Up to 458 conditions per place. [2023-08-31 01:44:10,052 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 41 selfloop transitions, 5 changer transitions 5/54 dead transitions. [2023-08-31 01:44:10,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 311 flow [2023-08-31 01:44:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:44:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:44:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-31 01:44:10,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-08-31 01:44:10,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-31 01:44:10,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-31 01:44:10,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:10,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-31 01:44:10,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,057 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 119 flow. Second operand 4 states and 392 transitions. [2023-08-31 01:44:10,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 311 flow [2023-08-31 01:44:10,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 301 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:10,061 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 145 flow [2023-08-31 01:44:10,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-31 01:44:10,062 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-31 01:44:10,064 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 145 flow [2023-08-31 01:44:10,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:10,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:10,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:44:10,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:10,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1297497348, now seen corresponding path program 1 times [2023-08-31 01:44:10,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550051417] [2023-08-31 01:44:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:10,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550051417] [2023-08-31 01:44:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550051417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:10,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:44:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350386172] [2023-08-31 01:44:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:44:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:44:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:44:10,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:10,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:10,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:10,345 INFO L130 PetriNetUnfolder]: 623/1049 cut-off events. [2023-08-31 01:44:10,345 INFO L131 PetriNetUnfolder]: For 2754/2858 co-relation queries the response was YES. [2023-08-31 01:44:10,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1049 events. 623/1049 cut-off events. For 2754/2858 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5075 event pairs, 191 based on Foata normal form. 164/1201 useless extension candidates. Maximal degree in co-relation 1674. Up to 527 conditions per place. [2023-08-31 01:44:10,350 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 59 selfloop transitions, 6 changer transitions 6/73 dead transitions. [2023-08-31 01:44:10,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 458 flow [2023-08-31 01:44:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:44:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:44:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2023-08-31 01:44:10,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532596685082873 [2023-08-31 01:44:10,351 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2023-08-31 01:44:10,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2023-08-31 01:44:10,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:10,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2023-08-31 01:44:10,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,354 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 145 flow. Second operand 5 states and 482 transitions. [2023-08-31 01:44:10,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 458 flow [2023-08-31 01:44:10,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 449 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:10,358 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 200 flow [2023-08-31 01:44:10,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-31 01:44:10,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-31 01:44:10,359 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 200 flow [2023-08-31 01:44:10,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:10,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:10,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:44:10,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:10,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -612746414, now seen corresponding path program 2 times [2023-08-31 01:44:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:10,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104237016] [2023-08-31 01:44:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104237016] [2023-08-31 01:44:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104237016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:10,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:10,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:44:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843024707] [2023-08-31 01:44:10,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:44:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:44:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:44:10,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-31 01:44:10,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:10,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-31 01:44:10,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:10,544 INFO L130 PetriNetUnfolder]: 839/1400 cut-off events. [2023-08-31 01:44:10,544 INFO L131 PetriNetUnfolder]: For 4717/5125 co-relation queries the response was YES. [2023-08-31 01:44:10,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1400 events. 839/1400 cut-off events. For 4717/5125 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7425 event pairs, 349 based on Foata normal form. 284/1615 useless extension candidates. Maximal degree in co-relation 2061. Up to 835 conditions per place. [2023-08-31 01:44:10,551 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 48 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-08-31 01:44:10,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 527 flow [2023-08-31 01:44:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:44:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:44:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2023-08-31 01:44:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537292817679558 [2023-08-31 01:44:10,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 389 transitions. [2023-08-31 01:44:10,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 389 transitions. [2023-08-31 01:44:10,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:10,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 389 transitions. [2023-08-31 01:44:10,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,555 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 200 flow. Second operand 4 states and 389 transitions. [2023-08-31 01:44:10,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 527 flow [2023-08-31 01:44:10,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 510 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:10,559 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 330 flow [2023-08-31 01:44:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-31 01:44:10,560 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-08-31 01:44:10,560 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 330 flow [2023-08-31 01:44:10,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:10,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:10,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 01:44:10,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:10,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1085629665, now seen corresponding path program 1 times [2023-08-31 01:44:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:10,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428967782] [2023-08-31 01:44:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:10,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428967782] [2023-08-31 01:44:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428967782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:10,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:10,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:44:10,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582538991] [2023-08-31 01:44:10,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:10,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:44:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:44:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:44:10,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-31 01:44:10,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:10,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-31 01:44:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:10,813 INFO L130 PetriNetUnfolder]: 880/1445 cut-off events. [2023-08-31 01:44:10,813 INFO L131 PetriNetUnfolder]: For 7838/8234 co-relation queries the response was YES. [2023-08-31 01:44:10,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1445 events. 880/1445 cut-off events. For 7838/8234 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7323 event pairs, 317 based on Foata normal form. 241/1633 useless extension candidates. Maximal degree in co-relation 2369. Up to 1085 conditions per place. [2023-08-31 01:44:10,821 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 49 selfloop transitions, 8 changer transitions 10/71 dead transitions. [2023-08-31 01:44:10,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 661 flow [2023-08-31 01:44:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:44:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:44:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-08-31 01:44:10,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386740331491713 [2023-08-31 01:44:10,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-08-31 01:44:10,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-08-31 01:44:10,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:10,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-08-31 01:44:10,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,824 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,824 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 330 flow. Second operand 4 states and 390 transitions. [2023-08-31 01:44:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 661 flow [2023-08-31 01:44:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:10,829 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 379 flow [2023-08-31 01:44:10,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-31 01:44:10,829 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-08-31 01:44:10,829 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 379 flow [2023-08-31 01:44:10,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:10,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:44:10,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:10,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 477800932, now seen corresponding path program 3 times [2023-08-31 01:44:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:10,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219702455] [2023-08-31 01:44:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:10,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:10,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219702455] [2023-08-31 01:44:10,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219702455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:10,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:44:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522049483] [2023-08-31 01:44:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:44:10,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:44:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:44:10,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:44:10,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:10,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:10,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:44:10,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:11,094 INFO L130 PetriNetUnfolder]: 1052/1733 cut-off events. [2023-08-31 01:44:11,094 INFO L131 PetriNetUnfolder]: For 8779/9064 co-relation queries the response was YES. [2023-08-31 01:44:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 1733 events. 1052/1733 cut-off events. For 8779/9064 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9211 event pairs, 307 based on Foata normal form. 169/1861 useless extension candidates. Maximal degree in co-relation 4650. Up to 894 conditions per place. [2023-08-31 01:44:11,103 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 65 selfloop transitions, 19 changer transitions 19/105 dead transitions. [2023-08-31 01:44:11,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 1055 flow [2023-08-31 01:44:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:44:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:44:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-08-31 01:44:11,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184162062615101 [2023-08-31 01:44:11,105 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-08-31 01:44:11,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-08-31 01:44:11,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:11,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-08-31 01:44:11,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,108 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,108 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 379 flow. Second operand 6 states and 563 transitions. [2023-08-31 01:44:11,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 1055 flow [2023-08-31 01:44:11,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 992 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:11,116 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 550 flow [2023-08-31 01:44:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-31 01:44:11,117 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-08-31 01:44:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 550 flow [2023-08-31 01:44:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:44:11,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:11,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1700934463, now seen corresponding path program 2 times [2023-08-31 01:44:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562749054] [2023-08-31 01:44:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:11,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562749054] [2023-08-31 01:44:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562749054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:11,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:44:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411956521] [2023-08-31 01:44:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:44:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:44:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:44:11,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-31 01:44:11,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:11,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-31 01:44:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:11,350 INFO L130 PetriNetUnfolder]: 1045/1689 cut-off events. [2023-08-31 01:44:11,350 INFO L131 PetriNetUnfolder]: For 10769/11037 co-relation queries the response was YES. [2023-08-31 01:44:11,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8448 conditions, 1689 events. 1045/1689 cut-off events. For 10769/11037 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8331 event pairs, 301 based on Foata normal form. 200/1824 useless extension candidates. Maximal degree in co-relation 7762. Up to 1238 conditions per place. [2023-08-31 01:44:11,361 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 60 selfloop transitions, 10 changer transitions 10/86 dead transitions. [2023-08-31 01:44:11,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 941 flow [2023-08-31 01:44:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:44:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:44:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-31 01:44:11,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-08-31 01:44:11,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-31 01:44:11,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-31 01:44:11,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:11,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-31 01:44:11,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,365 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 550 flow. Second operand 4 states and 392 transitions. [2023-08-31 01:44:11,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 941 flow [2023-08-31 01:44:11,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 904 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 01:44:11,377 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 580 flow [2023-08-31 01:44:11,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-08-31 01:44:11,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-08-31 01:44:11,380 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 580 flow [2023-08-31 01:44:11,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:11,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:11,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:44:11,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:11,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:11,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2003654564, now seen corresponding path program 4 times [2023-08-31 01:44:11,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:11,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558455637] [2023-08-31 01:44:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:11,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558455637] [2023-08-31 01:44:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558455637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:44:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411391119] [2023-08-31 01:44:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:44:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:44:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:44:11,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:11,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 580 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:11,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:11,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:11,664 INFO L130 PetriNetUnfolder]: 1002/1586 cut-off events. [2023-08-31 01:44:11,664 INFO L131 PetriNetUnfolder]: For 10884/11184 co-relation queries the response was YES. [2023-08-31 01:44:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8309 conditions, 1586 events. 1002/1586 cut-off events. For 10884/11184 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7449 event pairs, 364 based on Foata normal form. 184/1724 useless extension candidates. Maximal degree in co-relation 5291. Up to 1039 conditions per place. [2023-08-31 01:44:11,674 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 56 selfloop transitions, 12 changer transitions 20/90 dead transitions. [2023-08-31 01:44:11,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 970 flow [2023-08-31 01:44:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:44:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:44:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2023-08-31 01:44:11,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523756906077348 [2023-08-31 01:44:11,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2023-08-31 01:44:11,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2023-08-31 01:44:11,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:11,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2023-08-31 01:44:11,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,679 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,679 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 580 flow. Second operand 5 states and 474 transitions. [2023-08-31 01:44:11,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 970 flow [2023-08-31 01:44:11,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 935 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:11,696 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 597 flow [2023-08-31 01:44:11,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-31 01:44:11,697 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-08-31 01:44:11,697 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 597 flow [2023-08-31 01:44:11,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:11,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:11,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:44:11,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:11,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 641514423, now seen corresponding path program 3 times [2023-08-31 01:44:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:11,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264665009] [2023-08-31 01:44:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:11,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:11,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264665009] [2023-08-31 01:44:11,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264665009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:44:11,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:44:11,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:44:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360955067] [2023-08-31 01:44:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:44:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:44:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:44:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:44:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-31 01:44:11,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 597 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:11,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-31 01:44:11,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:11,888 INFO L130 PetriNetUnfolder]: 915/1375 cut-off events. [2023-08-31 01:44:11,889 INFO L131 PetriNetUnfolder]: For 11022/11376 co-relation queries the response was YES. [2023-08-31 01:44:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1375 events. 915/1375 cut-off events. For 11022/11376 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5997 event pairs, 249 based on Foata normal form. 232/1529 useless extension candidates. Maximal degree in co-relation 6687. Up to 901 conditions per place. [2023-08-31 01:44:11,897 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 54 selfloop transitions, 27 changer transitions 7/94 dead transitions. [2023-08-31 01:44:11,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 1141 flow [2023-08-31 01:44:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:44:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:44:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-08-31 01:44:11,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359116022099447 [2023-08-31 01:44:11,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-08-31 01:44:11,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-08-31 01:44:11,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:11,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-08-31 01:44:11,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,901 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 597 flow. Second operand 4 states and 388 transitions. [2023-08-31 01:44:11,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 1141 flow [2023-08-31 01:44:11,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 1075 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-31 01:44:11,908 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 834 flow [2023-08-31 01:44:11,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-08-31 01:44:11,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-31 01:44:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 834 flow [2023-08-31 01:44:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:11,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:11,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:11,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:44:11,910 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:11,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1824626704, now seen corresponding path program 1 times [2023-08-31 01:44:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35085055] [2023-08-31 01:44:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35085055] [2023-08-31 01:44:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35085055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297014981] [2023-08-31 01:44:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:11,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:11,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:11,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:44:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:44:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:12,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:12,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297014981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:12,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:12,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 01:44:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086732794] [2023-08-31 01:44:12,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:12,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:44:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:44:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:44:12,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:44:12,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:12,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:12,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:44:12,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:12,429 INFO L130 PetriNetUnfolder]: 1086/1555 cut-off events. [2023-08-31 01:44:12,430 INFO L131 PetriNetUnfolder]: For 14468/14605 co-relation queries the response was YES. [2023-08-31 01:44:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 1555 events. 1086/1555 cut-off events. For 14468/14605 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6193 event pairs, 240 based on Foata normal form. 116/1627 useless extension candidates. Maximal degree in co-relation 6510. Up to 1018 conditions per place. [2023-08-31 01:44:12,438 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 81 selfloop transitions, 49 changer transitions 2/136 dead transitions. [2023-08-31 01:44:12,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 136 transitions, 1919 flow [2023-08-31 01:44:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:44:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:44:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-31 01:44:12,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128913443830571 [2023-08-31 01:44:12,440 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-31 01:44:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-31 01:44:12,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:12,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-31 01:44:12,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:12,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:12,442 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:12,443 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 834 flow. Second operand 6 states and 557 transitions. [2023-08-31 01:44:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 136 transitions, 1919 flow [2023-08-31 01:44:12,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 136 transitions, 1885 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:12,452 INFO L231 Difference]: Finished difference. Result has 63 places, 104 transitions, 1582 flow [2023-08-31 01:44:12,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1582, PETRI_PLACES=63, PETRI_TRANSITIONS=104} [2023-08-31 01:44:12,452 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-08-31 01:44:12,452 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 104 transitions, 1582 flow [2023-08-31 01:44:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:12,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:12,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 01:44:12,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:12,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1346321687, now seen corresponding path program 1 times [2023-08-31 01:44:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018706927] [2023-08-31 01:44:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:12,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018706927] [2023-08-31 01:44:12,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018706927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646078994] [2023-08-31 01:44:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:12,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:12,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:12,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:44:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:13,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:13,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646078994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:13,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:13,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-31 01:44:13,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724038722] [2023-08-31 01:44:13,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:13,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:44:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:44:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:44:13,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:13,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 104 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:13,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:13,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:13,487 INFO L130 PetriNetUnfolder]: 1418/2025 cut-off events. [2023-08-31 01:44:13,487 INFO L131 PetriNetUnfolder]: For 22489/23121 co-relation queries the response was YES. [2023-08-31 01:44:13,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13604 conditions, 2025 events. 1418/2025 cut-off events. For 22489/23121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8150 event pairs, 48 based on Foata normal form. 155/2070 useless extension candidates. Maximal degree in co-relation 12560. Up to 1439 conditions per place. [2023-08-31 01:44:13,501 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 127 selfloop transitions, 55 changer transitions 2/195 dead transitions. [2023-08-31 01:44:13,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 2593 flow [2023-08-31 01:44:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 858 transitions. [2023-08-31 01:44:13,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267034990791897 [2023-08-31 01:44:13,503 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 858 transitions. [2023-08-31 01:44:13,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 858 transitions. [2023-08-31 01:44:13,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:13,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 858 transitions. [2023-08-31 01:44:13,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.33333333333333) internal successors, (858), 9 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:13,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:13,507 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:13,507 INFO L175 Difference]: Start difference. First operand has 63 places, 104 transitions, 1582 flow. Second operand 9 states and 858 transitions. [2023-08-31 01:44:13,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 2593 flow [2023-08-31 01:44:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 2405 flow, removed 82 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:13,524 INFO L231 Difference]: Finished difference. Result has 73 places, 135 transitions, 2039 flow [2023-08-31 01:44:13,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=73, PETRI_TRANSITIONS=135} [2023-08-31 01:44:13,525 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-08-31 01:44:13,525 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 135 transitions, 2039 flow [2023-08-31 01:44:13,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:13,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:13,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:13,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 01:44:13,730 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,SelfDestructingSolverStorable11 [2023-08-31 01:44:13,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:13,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash 684593127, now seen corresponding path program 2 times [2023-08-31 01:44:13,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:13,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558348400] [2023-08-31 01:44:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:13,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:13,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558348400] [2023-08-31 01:44:13,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558348400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034446084] [2023-08-31 01:44:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:44:13,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:13,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:13,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:44:13,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:44:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:14,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:14,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034446084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:14,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:14,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-08-31 01:44:14,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488225187] [2023-08-31 01:44:14,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:14,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:44:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:44:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:44:14,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:14,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 135 transitions, 2039 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:14,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:14,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:14,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:14,541 INFO L130 PetriNetUnfolder]: 1752/2515 cut-off events. [2023-08-31 01:44:14,542 INFO L131 PetriNetUnfolder]: For 28904/29412 co-relation queries the response was YES. [2023-08-31 01:44:14,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2515 events. 1752/2515 cut-off events. For 28904/29412 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10618 event pairs, 188 based on Foata normal form. 149/2542 useless extension candidates. Maximal degree in co-relation 16355. Up to 1963 conditions per place. [2023-08-31 01:44:14,556 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 142 selfloop transitions, 55 changer transitions 2/210 dead transitions. [2023-08-31 01:44:14,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 210 transitions, 2913 flow [2023-08-31 01:44:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-08-31 01:44:14,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-08-31 01:44:14,558 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-08-31 01:44:14,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-08-31 01:44:14,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:14,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-08-31 01:44:14,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:14,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:14,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:14,562 INFO L175 Difference]: Start difference. First operand has 73 places, 135 transitions, 2039 flow. Second operand 9 states and 854 transitions. [2023-08-31 01:44:14,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 210 transitions, 2913 flow [2023-08-31 01:44:14,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 210 transitions, 2673 flow, removed 108 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:14,587 INFO L231 Difference]: Finished difference. Result has 83 places, 154 transitions, 2238 flow [2023-08-31 01:44:14,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=83, PETRI_TRANSITIONS=154} [2023-08-31 01:44:14,588 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-31 01:44:14,588 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 154 transitions, 2238 flow [2023-08-31 01:44:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:14,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:14,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:14,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:14,796 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:14,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1615995569, now seen corresponding path program 3 times [2023-08-31 01:44:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217723643] [2023-08-31 01:44:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:14,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217723643] [2023-08-31 01:44:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217723643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071991433] [2023-08-31 01:44:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:44:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:14,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:14,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:44:15,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:44:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:15,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:15,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071991433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:15,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:15,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-31 01:44:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520058160] [2023-08-31 01:44:15,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:44:15,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:44:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:44:15,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:15,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 154 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:15,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:15,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:15,651 INFO L130 PetriNetUnfolder]: 2212/3181 cut-off events. [2023-08-31 01:44:15,651 INFO L131 PetriNetUnfolder]: For 36433/37003 co-relation queries the response was YES. [2023-08-31 01:44:15,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20923 conditions, 3181 events. 2212/3181 cut-off events. For 36433/37003 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13981 event pairs, 350 based on Foata normal form. 183/3222 useless extension candidates. Maximal degree in co-relation 20423. Up to 2597 conditions per place. [2023-08-31 01:44:15,669 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 173 selfloop transitions, 60 changer transitions 2/246 dead transitions. [2023-08-31 01:44:15,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 246 transitions, 3494 flow [2023-08-31 01:44:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-08-31 01:44:15,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-08-31 01:44:15,671 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-08-31 01:44:15,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-08-31 01:44:15,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:15,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-08-31 01:44:15,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:15,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:15,675 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:15,675 INFO L175 Difference]: Start difference. First operand has 83 places, 154 transitions, 2238 flow. Second operand 9 states and 854 transitions. [2023-08-31 01:44:15,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 246 transitions, 3494 flow [2023-08-31 01:44:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 246 transitions, 3273 flow, removed 88 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:15,728 INFO L231 Difference]: Finished difference. Result has 93 places, 190 transitions, 2823 flow [2023-08-31 01:44:15,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2823, PETRI_PLACES=93, PETRI_TRANSITIONS=190} [2023-08-31 01:44:15,729 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-31 01:44:15,729 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 190 transitions, 2823 flow [2023-08-31 01:44:15,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:15,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:15,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 01:44:15,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:15,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:15,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash -965213615, now seen corresponding path program 4 times [2023-08-31 01:44:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:15,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354465419] [2023-08-31 01:44:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:16,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354465419] [2023-08-31 01:44:16,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354465419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620959403] [2023-08-31 01:44:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:44:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:16,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:16,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:44:16,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:44:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620959403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:16,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:16,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-31 01:44:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484203618] [2023-08-31 01:44:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:44:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:44:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:44:16,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:16,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 190 transitions, 2823 flow. Second operand has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:16,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:16,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:16,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:16,862 INFO L130 PetriNetUnfolder]: 2520/3633 cut-off events. [2023-08-31 01:44:16,862 INFO L131 PetriNetUnfolder]: For 43800/44378 co-relation queries the response was YES. [2023-08-31 01:44:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23906 conditions, 3633 events. 2520/3633 cut-off events. For 43800/44378 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16416 event pairs, 494 based on Foata normal form. 175/3660 useless extension candidates. Maximal degree in co-relation 23393. Up to 3113 conditions per place. [2023-08-31 01:44:16,882 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 186 selfloop transitions, 60 changer transitions 2/259 dead transitions. [2023-08-31 01:44:16,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 259 transitions, 3865 flow [2023-08-31 01:44:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-08-31 01:44:16,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-08-31 01:44:16,885 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-08-31 01:44:16,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-08-31 01:44:16,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:16,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-08-31 01:44:16,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:16,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:16,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:16,888 INFO L175 Difference]: Start difference. First operand has 93 places, 190 transitions, 2823 flow. Second operand 9 states and 848 transitions. [2023-08-31 01:44:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 259 transitions, 3865 flow [2023-08-31 01:44:16,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 259 transitions, 3537 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:16,930 INFO L231 Difference]: Finished difference. Result has 103 places, 209 transitions, 3016 flow [2023-08-31 01:44:16,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3016, PETRI_PLACES=103, PETRI_TRANSITIONS=209} [2023-08-31 01:44:16,930 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-31 01:44:16,930 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 209 transitions, 3016 flow [2023-08-31 01:44:16,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:16,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:16,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:16,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:17,131 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 [2023-08-31 01:44:17,131 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:17,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash 453609461, now seen corresponding path program 5 times [2023-08-31 01:44:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:17,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790137696] [2023-08-31 01:44:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:17,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:17,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790137696] [2023-08-31 01:44:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790137696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588550516] [2023-08-31 01:44:17,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:44:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:17,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:17,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:44:17,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:44:17,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:17,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588550516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:17,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:17,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-31 01:44:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979958124] [2023-08-31 01:44:17,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:44:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:44:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:44:17,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:17,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 209 transitions, 3016 flow. Second operand has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:17,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:17,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:17,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:18,076 INFO L130 PetriNetUnfolder]: 2914/4205 cut-off events. [2023-08-31 01:44:18,076 INFO L131 PetriNetUnfolder]: For 49997/50637 co-relation queries the response was YES. [2023-08-31 01:44:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 4205 events. 2914/4205 cut-off events. For 49997/50637 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19652 event pairs, 614 based on Foata normal form. 205/4256 useless extension candidates. Maximal degree in co-relation 26645. Up to 3685 conditions per place. [2023-08-31 01:44:18,144 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 220 selfloop transitions, 61 changer transitions 2/294 dead transitions. [2023-08-31 01:44:18,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 294 transitions, 4461 flow [2023-08-31 01:44:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 846 transitions. [2023-08-31 01:44:18,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-31 01:44:18,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 846 transitions. [2023-08-31 01:44:18,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 846 transitions. [2023-08-31 01:44:18,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:18,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 846 transitions. [2023-08-31 01:44:18,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.0) internal successors, (846), 9 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:18,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:18,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:18,152 INFO L175 Difference]: Start difference. First operand has 103 places, 209 transitions, 3016 flow. Second operand 9 states and 846 transitions. [2023-08-31 01:44:18,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 294 transitions, 4461 flow [2023-08-31 01:44:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 294 transitions, 4174 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:18,204 INFO L231 Difference]: Finished difference. Result has 113 places, 246 transitions, 3631 flow [2023-08-31 01:44:18,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3631, PETRI_PLACES=113, PETRI_TRANSITIONS=246} [2023-08-31 01:44:18,205 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-08-31 01:44:18,206 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 246 transitions, 3631 flow [2023-08-31 01:44:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:18,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:18,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:18,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:18,414 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 [2023-08-31 01:44:18,414 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:18,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1955925559, now seen corresponding path program 6 times [2023-08-31 01:44:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:18,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865742268] [2023-08-31 01:44:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865742268] [2023-08-31 01:44:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865742268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634005955] [2023-08-31 01:44:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:44:18,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:18,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:18,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:18,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:44:18,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:44:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:44:18,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:18,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634005955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:18,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:18,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-31 01:44:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030966641] [2023-08-31 01:44:18,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:18,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:44:18,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:44:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:44:18,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:18,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 246 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:18,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:18,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:19,536 INFO L130 PetriNetUnfolder]: 3248/4695 cut-off events. [2023-08-31 01:44:19,537 INFO L131 PetriNetUnfolder]: For 58768/59424 co-relation queries the response was YES. [2023-08-31 01:44:19,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30469 conditions, 4695 events. 3248/4695 cut-off events. For 58768/59424 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22527 event pairs, 766 based on Foata normal form. 219/4762 useless extension candidates. Maximal degree in co-relation 29879. Up to 4143 conditions per place. [2023-08-31 01:44:19,563 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 241 selfloop transitions, 61 changer transitions 2/315 dead transitions. [2023-08-31 01:44:19,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 315 transitions, 4864 flow [2023-08-31 01:44:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:44:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:44:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-08-31 01:44:19,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-08-31 01:44:19,566 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-08-31 01:44:19,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-08-31 01:44:19,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:19,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-08-31 01:44:19,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:19,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:19,569 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:19,569 INFO L175 Difference]: Start difference. First operand has 113 places, 246 transitions, 3631 flow. Second operand 9 states and 848 transitions. [2023-08-31 01:44:19,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 315 transitions, 4864 flow [2023-08-31 01:44:19,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 315 transitions, 4480 flow, removed 180 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:19,632 INFO L231 Difference]: Finished difference. Result has 123 places, 265 transitions, 3829 flow [2023-08-31 01:44:19,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=123, PETRI_TRANSITIONS=265} [2023-08-31 01:44:19,632 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-08-31 01:44:19,632 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 265 transitions, 3829 flow [2023-08-31 01:44:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:19,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:19,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:19,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:19,841 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:19,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 398392542, now seen corresponding path program 7 times [2023-08-31 01:44:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116283058] [2023-08-31 01:44:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116283058] [2023-08-31 01:44:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116283058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136575344] [2023-08-31 01:44:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:44:19,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:19,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:19,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:44:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:19,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136575344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:20,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:20,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-31 01:44:20,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879772521] [2023-08-31 01:44:20,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:44:20,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:44:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:44:20,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:20,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 265 transitions, 3829 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:20,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:20,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:21,398 INFO L130 PetriNetUnfolder]: 6025/8816 cut-off events. [2023-08-31 01:44:21,398 INFO L131 PetriNetUnfolder]: For 95826/96115 co-relation queries the response was YES. [2023-08-31 01:44:21,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53796 conditions, 8816 events. 6025/8816 cut-off events. For 95826/96115 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45744 event pairs, 1153 based on Foata normal form. 211/8954 useless extension candidates. Maximal degree in co-relation 52165. Up to 2469 conditions per place. [2023-08-31 01:44:21,531 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 384 selfloop transitions, 114 changer transitions 0/502 dead transitions. [2023-08-31 01:44:21,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 502 transitions, 7721 flow [2023-08-31 01:44:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:44:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:44:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 960 transitions. [2023-08-31 01:44:21,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-08-31 01:44:21,538 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 960 transitions. [2023-08-31 01:44:21,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 960 transitions. [2023-08-31 01:44:21,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:21,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 960 transitions. [2023-08-31 01:44:21,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:21,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:21,542 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:21,542 INFO L175 Difference]: Start difference. First operand has 123 places, 265 transitions, 3829 flow. Second operand 10 states and 960 transitions. [2023-08-31 01:44:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 502 transitions, 7721 flow [2023-08-31 01:44:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 502 transitions, 7139 flow, removed 264 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:21,667 INFO L231 Difference]: Finished difference. Result has 137 places, 313 transitions, 4577 flow [2023-08-31 01:44:21,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4577, PETRI_PLACES=137, PETRI_TRANSITIONS=313} [2023-08-31 01:44:21,667 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-08-31 01:44:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 313 transitions, 4577 flow [2023-08-31 01:44:21,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:21,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:21,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:21,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:21,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:44:21,876 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:21,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 370733874, now seen corresponding path program 8 times [2023-08-31 01:44:21,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:21,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406469377] [2023-08-31 01:44:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:21,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:21,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:21,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406469377] [2023-08-31 01:44:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406469377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059425986] [2023-08-31 01:44:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:44:21,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:21,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:21,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:44:22,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:44:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:22,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:22,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059425986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:22,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:22,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:44:22,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338567624] [2023-08-31 01:44:22,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:22,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:44:22,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:44:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:44:22,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:22,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 313 transitions, 4577 flow. Second operand has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:22,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:22,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:22,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:23,545 INFO L130 PetriNetUnfolder]: 6565/9804 cut-off events. [2023-08-31 01:44:23,545 INFO L131 PetriNetUnfolder]: For 131046/131428 co-relation queries the response was YES. [2023-08-31 01:44:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60324 conditions, 9804 events. 6565/9804 cut-off events. For 131046/131428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55284 event pairs, 1032 based on Foata normal form. 379/10130 useless extension candidates. Maximal degree in co-relation 58619. Up to 3362 conditions per place. [2023-08-31 01:44:23,600 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 542 selfloop transitions, 161 changer transitions 0/707 dead transitions. [2023-08-31 01:44:23,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 707 transitions, 10612 flow [2023-08-31 01:44:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:44:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:44:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1132 transitions. [2023-08-31 01:44:23,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211786372007366 [2023-08-31 01:44:23,603 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1132 transitions. [2023-08-31 01:44:23,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1132 transitions. [2023-08-31 01:44:23,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:23,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1132 transitions. [2023-08-31 01:44:23,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.33333333333333) internal successors, (1132), 12 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:23,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:23,607 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:23,607 INFO L175 Difference]: Start difference. First operand has 137 places, 313 transitions, 4577 flow. Second operand 12 states and 1132 transitions. [2023-08-31 01:44:23,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 707 transitions, 10612 flow [2023-08-31 01:44:23,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 707 transitions, 10519 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 01:44:23,793 INFO L231 Difference]: Finished difference. Result has 152 places, 399 transitions, 6312 flow [2023-08-31 01:44:23,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6312, PETRI_PLACES=152, PETRI_TRANSITIONS=399} [2023-08-31 01:44:23,793 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2023-08-31 01:44:23,793 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 399 transitions, 6312 flow [2023-08-31 01:44:23,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:23,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:23,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:23,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 01:44:23,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:23,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:23,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1508408662, now seen corresponding path program 9 times [2023-08-31 01:44:23,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:23,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656716294] [2023-08-31 01:44:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:23,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656716294] [2023-08-31 01:44:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656716294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611141086] [2023-08-31 01:44:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:44:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:24,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:24,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:44:24,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:44:24,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:24,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611141086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:24,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-08-31 01:44:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457957843] [2023-08-31 01:44:24,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:44:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:44:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:44:24,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-31 01:44:24,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 399 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:24,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:24,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-31 01:44:24,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:26,797 INFO L130 PetriNetUnfolder]: 9129/13642 cut-off events. [2023-08-31 01:44:26,797 INFO L131 PetriNetUnfolder]: For 192789/192789 co-relation queries the response was YES. [2023-08-31 01:44:26,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96810 conditions, 13642 events. 9129/13642 cut-off events. For 192789/192789 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79594 event pairs, 1429 based on Foata normal form. 136/13778 useless extension candidates. Maximal degree in co-relation 94851. Up to 3821 conditions per place. [2023-08-31 01:44:26,883 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 482 selfloop transitions, 314 changer transitions 0/796 dead transitions. [2023-08-31 01:44:26,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 796 transitions, 14072 flow [2023-08-31 01:44:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:44:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:44:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1750 transitions. [2023-08-31 01:44:26,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088688572259378 [2023-08-31 01:44:26,886 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1750 transitions. [2023-08-31 01:44:26,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1750 transitions. [2023-08-31 01:44:26,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:26,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1750 transitions. [2023-08-31 01:44:26,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.10526315789474) internal successors, (1750), 19 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:26,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:26,895 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:26,895 INFO L175 Difference]: Start difference. First operand has 152 places, 399 transitions, 6312 flow. Second operand 19 states and 1750 transitions. [2023-08-31 01:44:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 796 transitions, 14072 flow [2023-08-31 01:44:27,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 796 transitions, 13414 flow, removed 239 selfloop flow, removed 1 redundant places. [2023-08-31 01:44:27,548 INFO L231 Difference]: Finished difference. Result has 181 places, 544 transitions, 9924 flow [2023-08-31 01:44:27,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9924, PETRI_PLACES=181, PETRI_TRANSITIONS=544} [2023-08-31 01:44:27,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-08-31 01:44:27,548 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 544 transitions, 9924 flow [2023-08-31 01:44:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:27,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:27,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:27,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:27,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:27,757 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:27,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1869920993, now seen corresponding path program 10 times [2023-08-31 01:44:27,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:27,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46056261] [2023-08-31 01:44:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:27,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46056261] [2023-08-31 01:44:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46056261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203914612] [2023-08-31 01:44:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:44:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:27,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:44:27,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:44:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:27,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203914612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:28,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:44:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863864017] [2023-08-31 01:44:28,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:44:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:44:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:44:28,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:28,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 544 transitions, 9924 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:28,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:28,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:30,909 INFO L130 PetriNetUnfolder]: 9529/14689 cut-off events. [2023-08-31 01:44:30,910 INFO L131 PetriNetUnfolder]: For 321607/321954 co-relation queries the response was YES. [2023-08-31 01:44:30,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112168 conditions, 14689 events. 9529/14689 cut-off events. For 321607/321954 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 93071 event pairs, 1858 based on Foata normal form. 651/15306 useless extension candidates. Maximal degree in co-relation 110057. Up to 5162 conditions per place. [2023-08-31 01:44:31,013 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 627 selfloop transitions, 309 changer transitions 57/1000 dead transitions. [2023-08-31 01:44:31,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1000 transitions, 19252 flow [2023-08-31 01:44:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:44:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:44:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1124 transitions. [2023-08-31 01:44:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2023-08-31 01:44:31,015 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1124 transitions. [2023-08-31 01:44:31,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1124 transitions. [2023-08-31 01:44:31,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:31,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1124 transitions. [2023-08-31 01:44:31,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.66666666666667) internal successors, (1124), 12 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:31,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:31,018 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:31,018 INFO L175 Difference]: Start difference. First operand has 181 places, 544 transitions, 9924 flow. Second operand 12 states and 1124 transitions. [2023-08-31 01:44:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1000 transitions, 19252 flow [2023-08-31 01:44:32,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1000 transitions, 18400 flow, removed 426 selfloop flow, removed 0 redundant places. [2023-08-31 01:44:32,579 INFO L231 Difference]: Finished difference. Result has 196 places, 662 transitions, 12095 flow [2023-08-31 01:44:32,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12095, PETRI_PLACES=196, PETRI_TRANSITIONS=662} [2023-08-31 01:44:32,579 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-08-31 01:44:32,579 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 662 transitions, 12095 flow [2023-08-31 01:44:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:32,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:32,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:32,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:32,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-31 01:44:32,780 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:32,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash 759710336, now seen corresponding path program 11 times [2023-08-31 01:44:32,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:32,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233493345] [2023-08-31 01:44:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:32,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233493345] [2023-08-31 01:44:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233493345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054124659] [2023-08-31 01:44:32,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:44:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:32,899 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:32,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:44:32,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:44:32,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:33,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054124659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:33,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 01:44:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795509994] [2023-08-31 01:44:33,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:44:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:44:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:44:33,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:44:33,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 662 transitions, 12095 flow. Second operand has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:33,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:33,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:44:33,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:36,893 INFO L130 PetriNetUnfolder]: 12256/18912 cut-off events. [2023-08-31 01:44:36,894 INFO L131 PetriNetUnfolder]: For 510180/511167 co-relation queries the response was YES. [2023-08-31 01:44:36,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154470 conditions, 18912 events. 12256/18912 cut-off events. For 510180/511167 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 125729 event pairs, 3713 based on Foata normal form. 525/19315 useless extension candidates. Maximal degree in co-relation 153036. Up to 7877 conditions per place. [2023-08-31 01:44:37,077 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 538 selfloop transitions, 527 changer transitions 0/1074 dead transitions. [2023-08-31 01:44:37,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1074 transitions, 21588 flow [2023-08-31 01:44:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:44:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:44:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1431 transitions. [2023-08-31 01:44:37,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270718232044199 [2023-08-31 01:44:37,079 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1431 transitions. [2023-08-31 01:44:37,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1431 transitions. [2023-08-31 01:44:37,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:37,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1431 transitions. [2023-08-31 01:44:37,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 95.4) internal successors, (1431), 15 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:37,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:37,084 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:37,084 INFO L175 Difference]: Start difference. First operand has 196 places, 662 transitions, 12095 flow. Second operand 15 states and 1431 transitions. [2023-08-31 01:44:37,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1074 transitions, 21588 flow [2023-08-31 01:44:39,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1074 transitions, 20884 flow, removed 352 selfloop flow, removed 0 redundant places. [2023-08-31 01:44:39,688 INFO L231 Difference]: Finished difference. Result has 218 places, 808 transitions, 16694 flow [2023-08-31 01:44:39,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=11895, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16694, PETRI_PLACES=218, PETRI_TRANSITIONS=808} [2023-08-31 01:44:39,688 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2023-08-31 01:44:39,688 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 808 transitions, 16694 flow [2023-08-31 01:44:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:39,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:39,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:39,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 01:44:39,893 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:39,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1097498205, now seen corresponding path program 12 times [2023-08-31 01:44:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612240042] [2023-08-31 01:44:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612240042] [2023-08-31 01:44:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612240042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497157867] [2023-08-31 01:44:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:44:39,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:39,991 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:39,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:44:40,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:44:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:40,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497157867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:40,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 01:44:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454228482] [2023-08-31 01:44:40,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:44:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:44:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:44:40,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-31 01:44:40,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 808 transitions, 16694 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:40,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:40,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-31 01:44:40,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:46,407 INFO L130 PetriNetUnfolder]: 16344/24921 cut-off events. [2023-08-31 01:44:46,407 INFO L131 PetriNetUnfolder]: For 621132/621132 co-relation queries the response was YES. [2023-08-31 01:44:46,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222877 conditions, 24921 events. 16344/24921 cut-off events. For 621132/621132 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 168448 event pairs, 1979 based on Foata normal form. 384/25305 useless extension candidates. Maximal degree in co-relation 219924. Up to 7259 conditions per place. [2023-08-31 01:44:46,750 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 744 selfloop transitions, 870 changer transitions 24/1638 dead transitions. [2023-08-31 01:44:46,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1638 transitions, 39416 flow [2023-08-31 01:44:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 01:44:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 01:44:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3544 transitions. [2023-08-31 01:44:46,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895027624309392 [2023-08-31 01:44:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3544 transitions. [2023-08-31 01:44:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3544 transitions. [2023-08-31 01:44:46,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:46,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3544 transitions. [2023-08-31 01:44:46,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.6) internal successors, (3544), 40 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:46,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:46,763 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:46,763 INFO L175 Difference]: Start difference. First operand has 218 places, 808 transitions, 16694 flow. Second operand 40 states and 3544 transitions. [2023-08-31 01:44:46,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1638 transitions, 39416 flow [2023-08-31 01:44:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1638 transitions, 38159 flow, removed 281 selfloop flow, removed 4 redundant places. [2023-08-31 01:44:50,974 INFO L231 Difference]: Finished difference. Result has 277 places, 1239 transitions, 30160 flow [2023-08-31 01:44:50,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=16000, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30160, PETRI_PLACES=277, PETRI_TRANSITIONS=1239} [2023-08-31 01:44:50,975 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-08-31 01:44:50,975 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1239 transitions, 30160 flow [2023-08-31 01:44:50,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:50,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:50,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:50,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 01:44:51,176 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:44:51,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash -675327254, now seen corresponding path program 13 times [2023-08-31 01:44:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:51,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728286009] [2023-08-31 01:44:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:51,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:51,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728286009] [2023-08-31 01:44:51,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728286009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:51,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54611690] [2023-08-31 01:44:51,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:44:51,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:51,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:51,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:51,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:44:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:44:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:51,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54611690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:51,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:51,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 01:44:51,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955604715] [2023-08-31 01:44:51,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:51,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:44:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:44:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:44:51,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:44:51,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1239 transitions, 30160 flow. Second operand has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:44:51,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:51,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:44:51,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:45:00,745 INFO L130 PetriNetUnfolder]: 17362/27169 cut-off events. [2023-08-31 01:45:00,745 INFO L131 PetriNetUnfolder]: For 973421/974450 co-relation queries the response was YES. [2023-08-31 01:45:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258734 conditions, 27169 events. 17362/27169 cut-off events. For 973421/974450 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 196745 event pairs, 2900 based on Foata normal form. 954/28070 useless extension candidates. Maximal degree in co-relation 256737. Up to 8079 conditions per place. [2023-08-31 01:45:01,045 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 942 selfloop transitions, 837 changer transitions 31/1825 dead transitions. [2023-08-31 01:45:01,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1825 transitions, 44035 flow [2023-08-31 01:45:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:45:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:45:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1998 transitions. [2023-08-31 01:45:01,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256511444356748 [2023-08-31 01:45:01,048 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1998 transitions. [2023-08-31 01:45:01,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1998 transitions. [2023-08-31 01:45:01,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:45:01,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1998 transitions. [2023-08-31 01:45:01,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.14285714285714) internal successors, (1998), 21 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:01,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:01,053 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:01,053 INFO L175 Difference]: Start difference. First operand has 277 places, 1239 transitions, 30160 flow. Second operand 21 states and 1998 transitions. [2023-08-31 01:45:01,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1825 transitions, 44035 flow [2023-08-31 01:45:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1825 transitions, 39708 flow, removed 1774 selfloop flow, removed 3 redundant places. [2023-08-31 01:45:06,197 INFO L231 Difference]: Finished difference. Result has 301 places, 1314 transitions, 30347 flow [2023-08-31 01:45:06,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25900, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=30347, PETRI_PLACES=301, PETRI_TRANSITIONS=1314} [2023-08-31 01:45:06,198 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2023-08-31 01:45:06,198 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1314 transitions, 30347 flow [2023-08-31 01:45:06,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:06,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:45:06,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:45:06,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 01:45:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:06,404 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:45:06,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:45:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 421066253, now seen corresponding path program 14 times [2023-08-31 01:45:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:45:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282971057] [2023-08-31 01:45:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:45:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:45:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:45:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:45:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:45:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282971057] [2023-08-31 01:45:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282971057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:45:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139485725] [2023-08-31 01:45:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:45:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:45:06,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:45:06,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:45:06,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:45:06,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:45:06,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:45:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:45:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:45:06,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:45:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:45:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139485725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:45:06,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:45:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 01:45:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472731262] [2023-08-31 01:45:06,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:45:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:45:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:45:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:45:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:45:06,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-31 01:45:06,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1314 transitions, 30347 flow. Second operand has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:06,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:45:06,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-31 01:45:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:45:19,769 INFO L130 PetriNetUnfolder]: 20220/32024 cut-off events. [2023-08-31 01:45:19,769 INFO L131 PetriNetUnfolder]: For 1011905/1011905 co-relation queries the response was YES. [2023-08-31 01:45:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311955 conditions, 32024 events. 20220/32024 cut-off events. For 1011905/1011905 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 241242 event pairs, 1279 based on Foata normal form. 904/32928 useless extension candidates. Maximal degree in co-relation 310180. Up to 9943 conditions per place. [2023-08-31 01:45:20,161 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 1617 selfloop transitions, 1264 changer transitions 50/2931 dead transitions. [2023-08-31 01:45:20,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2931 transitions, 72409 flow [2023-08-31 01:45:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-08-31 01:45:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-08-31 01:45:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9314 transitions. [2023-08-31 01:45:20,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809211545412299 [2023-08-31 01:45:20,167 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9314 transitions. [2023-08-31 01:45:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9314 transitions. [2023-08-31 01:45:20,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:45:20,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9314 transitions. [2023-08-31 01:45:20,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 87.04672897196262) internal successors, (9314), 107 states have internal predecessors, (9314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:20,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:20,187 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:20,187 INFO L175 Difference]: Start difference. First operand has 301 places, 1314 transitions, 30347 flow. Second operand 107 states and 9314 transitions. [2023-08-31 01:45:20,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2931 transitions, 72409 flow [2023-08-31 01:45:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2931 transitions, 69443 flow, removed 955 selfloop flow, removed 8 redundant places. [2023-08-31 01:45:28,299 INFO L231 Difference]: Finished difference. Result has 457 places, 1751 transitions, 45382 flow [2023-08-31 01:45:28,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=28313, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=45382, PETRI_PLACES=457, PETRI_TRANSITIONS=1751} [2023-08-31 01:45:28,300 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 428 predicate places. [2023-08-31 01:45:28,300 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1751 transitions, 45382 flow [2023-08-31 01:45:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:28,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:45:28,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:45:28,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:45:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:28,501 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:45:28,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:45:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1130474012, now seen corresponding path program 15 times [2023-08-31 01:45:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:45:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256394146] [2023-08-31 01:45:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:45:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:45:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:45:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:45:28,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:45:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256394146] [2023-08-31 01:45:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256394146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:45:28,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662803674] [2023-08-31 01:45:28,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:45:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:45:28,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:45:28,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:45:28,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:45:28,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:45:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:45:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:45:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:45:28,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:45:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:45:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662803674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:45:28,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:45:28,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 01:45:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330113603] [2023-08-31 01:45:28,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:45:28,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:45:28,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:45:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:45:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:45:28,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-31 01:45:28,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1751 transitions, 45382 flow. Second operand has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:28,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:45:28,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-31 01:45:28,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:45:44,548 INFO L130 PetriNetUnfolder]: 22490/35283 cut-off events. [2023-08-31 01:45:44,549 INFO L131 PetriNetUnfolder]: For 1898312/1898312 co-relation queries the response was YES. [2023-08-31 01:45:45,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413375 conditions, 35283 events. 22490/35283 cut-off events. For 1898312/1898312 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 264287 event pairs, 4018 based on Foata normal form. 448/35731 useless extension candidates. Maximal degree in co-relation 411626. Up to 12065 conditions per place. [2023-08-31 01:45:45,238 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 1269 selfloop transitions, 1128 changer transitions 10/2407 dead transitions. [2023-08-31 01:45:45,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2407 transitions, 68462 flow [2023-08-31 01:45:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 01:45:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 01:45:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2178 transitions. [2023-08-31 01:45:45,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013812154696132 [2023-08-31 01:45:45,241 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2178 transitions. [2023-08-31 01:45:45,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2178 transitions. [2023-08-31 01:45:45,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:45:45,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2178 transitions. [2023-08-31 01:45:45,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.75) internal successors, (2178), 24 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:45,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:45,246 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:45:45,246 INFO L175 Difference]: Start difference. First operand has 457 places, 1751 transitions, 45382 flow. Second operand 24 states and 2178 transitions. [2023-08-31 01:45:45,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 2407 transitions, 68462 flow [2023-08-31 01:46:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2407 transitions, 58728 flow, removed 4124 selfloop flow, removed 16 redundant places. [2023-08-31 01:46:04,862 INFO L231 Difference]: Finished difference. Result has 477 places, 1949 transitions, 47880 flow [2023-08-31 01:46:04,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38967, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=47880, PETRI_PLACES=477, PETRI_TRANSITIONS=1949} [2023-08-31 01:46:04,863 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 448 predicate places. [2023-08-31 01:46:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1949 transitions, 47880 flow [2023-08-31 01:46:04,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:04,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:46:04,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:46:04,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 01:46:05,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 01:46:05,069 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:46:05,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:46:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1061750104, now seen corresponding path program 16 times [2023-08-31 01:46:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:46:05,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356454535] [2023-08-31 01:46:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:46:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:46:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:46:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:46:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356454535] [2023-08-31 01:46:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356454535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:46:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185005336] [2023-08-31 01:46:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:46:05,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:46:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:46:05,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:46:05,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:46:05,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:46:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:46:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:46:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:46:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:46:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185005336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:46:05,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:46:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 01:46:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844128610] [2023-08-31 01:46:05,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:46:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:46:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:46:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:46:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:46:05,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:46:05,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1949 transitions, 47880 flow. Second operand has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:05,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:46:05,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:46:05,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:46:26,300 INFO L130 PetriNetUnfolder]: 27906/43562 cut-off events. [2023-08-31 01:46:26,300 INFO L131 PetriNetUnfolder]: For 2834220/2835265 co-relation queries the response was YES. [2023-08-31 01:46:27,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505351 conditions, 43562 events. 27906/43562 cut-off events. For 2834220/2835265 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 334716 event pairs, 4339 based on Foata normal form. 871/44253 useless extension candidates. Maximal degree in co-relation 502266. Up to 15937 conditions per place. [2023-08-31 01:46:27,452 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1222 selfloop transitions, 1536 changer transitions 10/2793 dead transitions. [2023-08-31 01:46:27,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2793 transitions, 73383 flow [2023-08-31 01:46:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:46:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:46:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-08-31 01:46:27,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-31 01:46:27,455 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-08-31 01:46:27,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-08-31 01:46:27,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:46:27,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-08-31 01:46:27,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:27,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:27,459 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:27,459 INFO L175 Difference]: Start difference. First operand has 477 places, 1949 transitions, 47880 flow. Second operand 21 states and 1974 transitions. [2023-08-31 01:46:27,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2793 transitions, 73383 flow [2023-08-31 01:46:51,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2793 transitions, 70522 flow, removed 1040 selfloop flow, removed 2 redundant places. [2023-08-31 01:46:51,897 INFO L231 Difference]: Finished difference. Result has 501 places, 2275 transitions, 60052 flow [2023-08-31 01:46:51,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=45422, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60052, PETRI_PLACES=501, PETRI_TRANSITIONS=2275} [2023-08-31 01:46:51,899 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-08-31 01:46:51,899 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 2275 transitions, 60052 flow [2023-08-31 01:46:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:51,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:46:51,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:46:51,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:46:52,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 01:46:52,104 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:46:52,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:46:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1702446798, now seen corresponding path program 17 times [2023-08-31 01:46:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:46:52,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381800855] [2023-08-31 01:46:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:46:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:46:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:46:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:46:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381800855] [2023-08-31 01:46:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381800855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:46:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411737160] [2023-08-31 01:46:52,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:46:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:46:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:46:52,177 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:46:52,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:46:52,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:46:52,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:46:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:46:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:46:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:46:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:46:52,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411737160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:46:52,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:46:52,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 01:46:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17470190] [2023-08-31 01:46:52,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:46:52,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:46:52,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:46:52,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:46:52,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:46:52,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 01:46:52,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 2275 transitions, 60052 flow. Second operand has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:46:52,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:46:52,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 01:46:52,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:47:24,641 INFO L130 PetriNetUnfolder]: 36739/58795 cut-off events. [2023-08-31 01:47:24,641 INFO L131 PetriNetUnfolder]: For 3812895/3814653 co-relation queries the response was YES. [2023-08-31 01:47:26,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684475 conditions, 58795 events. 36739/58795 cut-off events. For 3812895/3814653 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 492327 event pairs, 7925 based on Foata normal form. 1620/60211 useless extension candidates. Maximal degree in co-relation 682787. Up to 25301 conditions per place. [2023-08-31 01:47:26,567 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 2409 selfloop transitions, 1221 changer transitions 83/3738 dead transitions. [2023-08-31 01:47:26,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3738 transitions, 99381 flow [2023-08-31 01:47:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:47:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:47:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2160 transitions. [2023-08-31 01:47:26,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188565938025462 [2023-08-31 01:47:26,570 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2160 transitions. [2023-08-31 01:47:26,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2160 transitions. [2023-08-31 01:47:26,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:47:26,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2160 transitions. [2023-08-31 01:47:26,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.91304347826087) internal successors, (2160), 23 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:47:26,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:47:26,575 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:47:26,575 INFO L175 Difference]: Start difference. First operand has 501 places, 2275 transitions, 60052 flow. Second operand 23 states and 2160 transitions. [2023-08-31 01:47:26,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3738 transitions, 99381 flow [2023-08-31 01:48:07,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 3738 transitions, 95826 flow, removed 773 selfloop flow, removed 6 redundant places. [2023-08-31 01:48:07,885 INFO L231 Difference]: Finished difference. Result has 531 places, 2844 transitions, 77170 flow [2023-08-31 01:48:07,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=57051, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=77170, PETRI_PLACES=531, PETRI_TRANSITIONS=2844} [2023-08-31 01:48:07,887 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 502 predicate places. [2023-08-31 01:48:07,887 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2844 transitions, 77170 flow [2023-08-31 01:48:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:48:07,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:48:07,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:48:07,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 01:48:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 01:48:08,091 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:48:08,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:48:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1866322504, now seen corresponding path program 18 times [2023-08-31 01:48:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:48:08,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615997494] [2023-08-31 01:48:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:48:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:48:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:48:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:48:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615997494] [2023-08-31 01:48:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615997494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:48:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026393147] [2023-08-31 01:48:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:48:08,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:48:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:48:08,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:48:08,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 01:48:08,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:48:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:48:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:48:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:48:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:08,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:48:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026393147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:48:08,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:48:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 01:48:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269442637] [2023-08-31 01:48:08,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:48:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:48:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:48:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:48:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:48:08,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:48:08,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2844 transitions, 77170 flow. Second operand has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:48:08,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:48:08,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:48:08,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:49:10,717 INFO L130 PetriNetUnfolder]: 56508/91382 cut-off events. [2023-08-31 01:49:10,717 INFO L131 PetriNetUnfolder]: For 6643618/6644083 co-relation queries the response was YES. [2023-08-31 01:49:13,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128416 conditions, 91382 events. 56508/91382 cut-off events. For 6643618/6644083 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 818134 event pairs, 8552 based on Foata normal form. 2337/93600 useless extension candidates. Maximal degree in co-relation 1126717. Up to 31473 conditions per place. [2023-08-31 01:49:14,253 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2344 selfloop transitions, 1760 changer transitions 15/4172 dead transitions. [2023-08-31 01:49:14,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 4172 transitions, 124408 flow [2023-08-31 01:49:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:49:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:49:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-08-31 01:49:14,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-08-31 01:49:14,256 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-08-31 01:49:14,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-08-31 01:49:14,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:49:14,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-08-31 01:49:14,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:49:14,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:49:14,260 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:49:14,260 INFO L175 Difference]: Start difference. First operand has 531 places, 2844 transitions, 77170 flow. Second operand 21 states and 1974 transitions. [2023-08-31 01:49:14,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 4172 transitions, 124408 flow [2023-08-31 01:51:12,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 4172 transitions, 119034 flow, removed 2361 selfloop flow, removed 4 redundant places. [2023-08-31 01:51:12,650 INFO L231 Difference]: Finished difference. Result has 555 places, 3245 transitions, 90846 flow [2023-08-31 01:51:12,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74906, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=90846, PETRI_PLACES=555, PETRI_TRANSITIONS=3245} [2023-08-31 01:51:12,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 526 predicate places. [2023-08-31 01:51:12,654 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 3245 transitions, 90846 flow [2023-08-31 01:51:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:51:12,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:51:12,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:51:12,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 01:51:12,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 01:51:12,859 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:51:12,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:51:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1400967236, now seen corresponding path program 19 times [2023-08-31 01:51:12,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:51:12,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147715257] [2023-08-31 01:51:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:51:12,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:51:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:51:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:51:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:51:12,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147715257] [2023-08-31 01:51:12,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147715257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:51:12,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379564204] [2023-08-31 01:51:12,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:51:12,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:51:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:51:12,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:51:12,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 01:51:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:51:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:51:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:51:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:51:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:51:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:51:13,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379564204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:51:13,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:51:13,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-31 01:51:13,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884406868] [2023-08-31 01:51:13,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:51:13,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:51:13,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:51:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:51:13,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:51:13,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-31 01:51:13,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 3245 transitions, 90846 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:51:13,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:51:13,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-31 01:51:13,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:52:44,178 INFO L130 PetriNetUnfolder]: 70083/114413 cut-off events. [2023-08-31 01:52:44,178 INFO L131 PetriNetUnfolder]: For 9409478/9409478 co-relation queries the response was YES. [2023-08-31 01:52:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464709 conditions, 114413 events. 70083/114413 cut-off events. For 9409478/9409478 co-relation queries the response was YES. Maximal size of possible extension queue 5612. Compared 1078895 event pairs, 6761 based on Foata normal form. 814/115227 useless extension candidates. Maximal degree in co-relation 1462812. Up to 40233 conditions per place. [2023-08-31 01:52:48,890 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 2983 selfloop transitions, 2617 changer transitions 54/5654 dead transitions. [2023-08-31 01:52:48,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 5654 transitions, 168291 flow [2023-08-31 01:52:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 01:52:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 01:52:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3460 transitions. [2023-08-31 01:52:48,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49015441280634653 [2023-08-31 01:52:48,892 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3460 transitions. [2023-08-31 01:52:48,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3460 transitions. [2023-08-31 01:52:48,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:52:48,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3460 transitions. [2023-08-31 01:52:48,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.71794871794872) internal successors, (3460), 39 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:52:48,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:52:48,899 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:52:48,899 INFO L175 Difference]: Start difference. First operand has 555 places, 3245 transitions, 90846 flow. Second operand 39 states and 3460 transitions. [2023-08-31 01:52:48,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 5654 transitions, 168291 flow [2023-08-31 01:55:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 5654 transitions, 163781 flow, removed 1315 selfloop flow, removed 4 redundant places. [2023-08-31 01:55:09,022 INFO L231 Difference]: Finished difference. Result has 610 places, 4265 transitions, 130156 flow [2023-08-31 01:55:09,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=88148, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=130156, PETRI_PLACES=610, PETRI_TRANSITIONS=4265} [2023-08-31 01:55:09,025 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 581 predicate places. [2023-08-31 01:55:09,025 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 4265 transitions, 130156 flow [2023-08-31 01:55:09,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:55:09,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:09,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:09,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-31 01:55:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:09,229 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:09,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1116183444, now seen corresponding path program 20 times [2023-08-31 01:55:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989070614] [2023-08-31 01:55:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989070614] [2023-08-31 01:55:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989070614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012783979] [2023-08-31 01:55:09,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:55:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:09,302 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 01:55:09,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:55:09,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:09,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 01:55:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012783979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:09,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:09,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 01:55:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497414433] [2023-08-31 01:55:09,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:09,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:55:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:55:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:55:09,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-31 01:55:09,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 4265 transitions, 130156 flow. Second operand has 15 states, 15 states have (on average 85.26666666666667) internal successors, (1279), 15 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:55:09,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:09,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-31 01:55:09,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15