./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:30:39,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:30:39,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:30:39,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:30:39,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:30:39,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:30:39,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:30:39,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:30:39,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:30:39,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:30:39,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:30:39,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:30:39,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:30:39,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:30:39,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:30:39,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:30:39,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:30:39,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:30:39,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:30:39,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:30:39,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:30:39,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:30:39,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:30:39,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:30:39,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:30:39,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:30:39,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:30:39,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:30:39,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:30:39,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:30:39,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:30:39,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:30:39,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:30:39,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:30:39,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:30:39,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:30:39,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:30:39,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:30:39,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:30:39,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:30:39,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:30:39,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:30:39,501 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:30:39,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:30:39,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:30:39,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:30:39,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:30:39,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:30:39,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:30:39,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:30:39,503 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:30:39,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:30:39,504 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:30:39,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:30:39,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:30:39,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:30:39,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:30:39,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:30:39,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:30:39,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:30:39,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:30:39,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:30:39,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:30:39,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:30:39,508 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:30:39,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:30:39,508 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:30:39,508 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:30:39,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:30:39,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:30:39,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:30:39,830 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:30:39,830 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:30:39,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-31 01:30:41,059 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:30:41,255 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:30:41,256 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-08-31 01:30:41,261 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c21436ba/5e4a878a8bd0423d84c601aeb932eca9/FLAGaac87d185 [2023-08-31 01:30:41,276 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c21436ba/5e4a878a8bd0423d84c601aeb932eca9 [2023-08-31 01:30:41,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:30:41,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:30:41,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:30:41,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:30:41,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:30:41,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4df5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41, skipping insertion in model container [2023-08-31 01:30:41,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:30:41,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:30:41,515 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-08-31 01:30:41,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:30:41,539 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:30:41,577 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c[3345,3358] [2023-08-31 01:30:41,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:30:41,605 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:30:41,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41 WrapperNode [2023-08-31 01:30:41,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:30:41,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:30:41,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:30:41,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:30:41,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,669 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 185 [2023-08-31 01:30:41,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:30:41,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:30:41,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:30:41,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:30:41,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,720 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:30:41,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:30:41,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:30:41,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:30:41,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (1/1) ... [2023-08-31 01:30:41,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:30:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:30:41,782 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 01:30:41,839 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 01:30:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:30:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:30:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:30:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:30:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:30:41,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:30:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:30:41,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:30:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:30:41,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:30:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:30:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:30:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:30:41,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:30:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:30:41,860 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 01:30:41,962 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:30:41,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:30:42,397 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:30:42,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:30:42,407 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 01:30:42,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:30:42 BoogieIcfgContainer [2023-08-31 01:30:42,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:30:42,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:30:42,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:30:42,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:30:42,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:30:41" (1/3) ... [2023-08-31 01:30:42,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad4bb31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:30:42, skipping insertion in model container [2023-08-31 01:30:42,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:30:41" (2/3) ... [2023-08-31 01:30:42,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad4bb31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:30:42, skipping insertion in model container [2023-08-31 01:30:42,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:30:42" (3/3) ... [2023-08-31 01:30:42,421 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-08-31 01:30:42,428 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:30:42,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:30:42,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:30:42,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:30:42,557 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:30:42,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 297 transitions, 618 flow [2023-08-31 01:30:42,732 INFO L130 PetriNetUnfolder]: 29/294 cut-off events. [2023-08-31 01:30:42,734 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:30:42,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 294 events. 29/294 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-31 01:30:42,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 297 transitions, 618 flow [2023-08-31 01:30:42,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 284 transitions, 586 flow [2023-08-31 01:30:42,758 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:30:42,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 284 transitions, 586 flow [2023-08-31 01:30:42,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 284 transitions, 586 flow [2023-08-31 01:30:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 284 transitions, 586 flow [2023-08-31 01:30:42,855 INFO L130 PetriNetUnfolder]: 29/284 cut-off events. [2023-08-31 01:30:42,855 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:30:42,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 284 events. 29/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-08-31 01:30:42,862 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-31 01:30:50,775 INFO L134 LiptonReduction]: Checked pairs total: 9778 [2023-08-31 01:30:50,776 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-31 01:30:50,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:30:50,792 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;@1404c5bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:30:50,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:30:50,800 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2023-08-31 01:30:50,800 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:30:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:50,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:30:50,802 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 01:30:50,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash -767736383, now seen corresponding path program 1 times [2023-08-31 01:30:50,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:50,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654956019] [2023-08-31 01:30:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:51,325 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 01:30:51,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:51,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654956019] [2023-08-31 01:30:51,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654956019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:51,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:51,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:30:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017692028] [2023-08-31 01:30:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:30:51,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:30:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:30:51,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 594 [2023-08-31 01:30:51,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:51,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:51,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 594 [2023-08-31 01:30:51,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:51,604 INFO L130 PetriNetUnfolder]: 1126/1525 cut-off events. [2023-08-31 01:30:51,604 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-31 01:30:51,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1525 events. 1126/1525 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5006 event pairs, 489 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 2520. Up to 1127 conditions per place. [2023-08-31 01:30:51,612 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 35 selfloop transitions, 0 changer transitions 26/61 dead transitions. [2023-08-31 01:30:51,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 275 flow [2023-08-31 01:30:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:30:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:30:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-31 01:30:51,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214365881032546 [2023-08-31 01:30:51,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-31 01:30:51,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-31 01:30:51,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:51,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-31 01:30:51,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:51,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:51,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:51,646 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 877 transitions. [2023-08-31 01:30:51,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 275 flow [2023-08-31 01:30:51,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:30:51,653 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2023-08-31 01:30:51,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-31 01:30:51,658 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-31 01:30:51,658 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2023-08-31 01:30:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:51,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:51,659 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 01:30:51,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:30:51,660 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 01:30:51,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 232711153, now seen corresponding path program 1 times [2023-08-31 01:30:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:51,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036608984] [2023-08-31 01:30:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:52,468 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 01:30:52,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:52,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036608984] [2023-08-31 01:30:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036608984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:52,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:52,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154151246] [2023-08-31 01:30:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:52,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:52,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:52,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:52,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:52,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:52,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:52,819 INFO L130 PetriNetUnfolder]: 742/1039 cut-off events. [2023-08-31 01:30:52,819 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-31 01:30:52,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1039 events. 742/1039 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3759 event pairs, 47 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2112. Up to 750 conditions per place. [2023-08-31 01:30:52,824 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-08-31 01:30:52,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 327 flow [2023-08-31 01:30:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1383 transitions. [2023-08-31 01:30:52,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2023-08-31 01:30:52,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1383 transitions. [2023-08-31 01:30:52,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1383 transitions. [2023-08-31 01:30:52,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:52,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1383 transitions. [2023-08-31 01:30:52,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:52,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:52,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:52,846 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 5 states and 1383 transitions. [2023-08-31 01:30:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 327 flow [2023-08-31 01:30:52,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 323 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:30:52,848 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 91 flow [2023-08-31 01:30:52,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-31 01:30:52,849 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-31 01:30:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 91 flow [2023-08-31 01:30:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:52,850 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 01:30:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:30:52,851 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 01:30:52,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1633443233, now seen corresponding path program 2 times [2023-08-31 01:30:52,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:52,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664935939] [2023-08-31 01:30:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:53,432 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 01:30:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664935939] [2023-08-31 01:30:53,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664935939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:53,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:53,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268889229] [2023-08-31 01:30:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:53,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:53,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:53,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:53,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:53,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:53,791 INFO L130 PetriNetUnfolder]: 804/1161 cut-off events. [2023-08-31 01:30:53,791 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-31 01:30:53,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1161 events. 804/1161 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4107 event pairs, 393 based on Foata normal form. 1/929 useless extension candidates. Maximal degree in co-relation 2564. Up to 895 conditions per place. [2023-08-31 01:30:53,799 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 60 selfloop transitions, 3 changer transitions 10/73 dead transitions. [2023-08-31 01:30:53,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 333 flow [2023-08-31 01:30:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1378 transitions. [2023-08-31 01:30:53,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463973063973064 [2023-08-31 01:30:53,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1378 transitions. [2023-08-31 01:30:53,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1378 transitions. [2023-08-31 01:30:53,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:53,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1378 transitions. [2023-08-31 01:30:53,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:53,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:53,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:53,813 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 91 flow. Second operand 5 states and 1378 transitions. [2023-08-31 01:30:53,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 333 flow [2023-08-31 01:30:53,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 324 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 01:30:53,817 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2023-08-31 01:30:53,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-31 01:30:53,820 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-31 01:30:53,822 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2023-08-31 01:30:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:53,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:53,824 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 01:30:53,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:30:53,824 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 01:30:53,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash 335853887, now seen corresponding path program 3 times [2023-08-31 01:30:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129312] [2023-08-31 01:30:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:53,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:54,388 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 01:30:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129312] [2023-08-31 01:30:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:54,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:54,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538378221] [2023-08-31 01:30:54,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:54,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:54,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:54,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:54,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:54,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:54,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:54,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:54,750 INFO L130 PetriNetUnfolder]: 884/1293 cut-off events. [2023-08-31 01:30:54,751 INFO L131 PetriNetUnfolder]: For 758/758 co-relation queries the response was YES. [2023-08-31 01:30:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1293 events. 884/1293 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5286 event pairs, 77 based on Foata normal form. 1/1033 useless extension candidates. Maximal degree in co-relation 3033. Up to 904 conditions per place. [2023-08-31 01:30:54,758 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 67 selfloop transitions, 3 changer transitions 11/81 dead transitions. [2023-08-31 01:30:54,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 385 flow [2023-08-31 01:30:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1385 transitions. [2023-08-31 01:30:54,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2023-08-31 01:30:54,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1385 transitions. [2023-08-31 01:30:54,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1385 transitions. [2023-08-31 01:30:54,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:54,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1385 transitions. [2023-08-31 01:30:54,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:54,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:54,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:54,772 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 5 states and 1385 transitions. [2023-08-31 01:30:54,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 385 flow [2023-08-31 01:30:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 374 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 01:30:54,776 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 123 flow [2023-08-31 01:30:54,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-31 01:30:54,777 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-08-31 01:30:54,777 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 123 flow [2023-08-31 01:30:54,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:54,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:54,778 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 01:30:54,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:30:54,779 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 01:30:54,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash -279052683, now seen corresponding path program 4 times [2023-08-31 01:30:54,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:54,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221799593] [2023-08-31 01:30:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:54,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:55,430 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 01:30:55,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221799593] [2023-08-31 01:30:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221799593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:55,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:55,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754759066] [2023-08-31 01:30:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:55,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:55,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:55,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:55,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:55,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:55,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:55,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:55,813 INFO L130 PetriNetUnfolder]: 983/1468 cut-off events. [2023-08-31 01:30:55,813 INFO L131 PetriNetUnfolder]: For 1519/1519 co-relation queries the response was YES. [2023-08-31 01:30:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1468 events. 983/1468 cut-off events. For 1519/1519 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5805 event pairs, 494 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 3591. Up to 1056 conditions per place. [2023-08-31 01:30:55,822 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 63 selfloop transitions, 4 changer transitions 11/78 dead transitions. [2023-08-31 01:30:55,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 398 flow [2023-08-31 01:30:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1380 transitions. [2023-08-31 01:30:55,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-08-31 01:30:55,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1380 transitions. [2023-08-31 01:30:55,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1380 transitions. [2023-08-31 01:30:55,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:55,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1380 transitions. [2023-08-31 01:30:55,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:55,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:55,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:55,835 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 123 flow. Second operand 5 states and 1380 transitions. [2023-08-31 01:30:55,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 398 flow [2023-08-31 01:30:55,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 382 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-31 01:30:55,839 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 148 flow [2023-08-31 01:30:55,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-31 01:30:55,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-31 01:30:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 148 flow [2023-08-31 01:30:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:55,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:55,841 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 01:30:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 01:30:55,842 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 01:30:55,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -516534259, now seen corresponding path program 5 times [2023-08-31 01:30:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617451156] [2023-08-31 01:30:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:55,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:56,411 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 01:30:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617451156] [2023-08-31 01:30:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617451156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:56,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:56,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:56,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365126489] [2023-08-31 01:30:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:56,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:56,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:56,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:56,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:56,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:56,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:56,825 INFO L130 PetriNetUnfolder]: 977/1448 cut-off events. [2023-08-31 01:30:56,825 INFO L131 PetriNetUnfolder]: For 2082/2082 co-relation queries the response was YES. [2023-08-31 01:30:56,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1448 events. 977/1448 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5716 event pairs, 563 based on Foata normal form. 1/1156 useless extension candidates. Maximal degree in co-relation 3666. Up to 1179 conditions per place. [2023-08-31 01:30:56,833 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 4 changer transitions 10/79 dead transitions. [2023-08-31 01:30:56,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 407 flow [2023-08-31 01:30:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1382 transitions. [2023-08-31 01:30:56,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653198653198653 [2023-08-31 01:30:56,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1382 transitions. [2023-08-31 01:30:56,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1382 transitions. [2023-08-31 01:30:56,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:56,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1382 transitions. [2023-08-31 01:30:56,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.4) internal successors, (1382), 5 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:56,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:56,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:56,845 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 148 flow. Second operand 5 states and 1382 transitions. [2023-08-31 01:30:56,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 407 flow [2023-08-31 01:30:56,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 391 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-31 01:30:56,851 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 147 flow [2023-08-31 01:30:56,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-31 01:30:56,852 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-31 01:30:56,852 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 147 flow [2023-08-31 01:30:56,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:56,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:56,853 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 01:30:56,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:30:56,853 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 01:30:56,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1858424173, now seen corresponding path program 6 times [2023-08-31 01:30:56,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:56,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764298879] [2023-08-31 01:30:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:57,329 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 01:30:57,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:57,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764298879] [2023-08-31 01:30:57,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764298879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:57,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:57,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:57,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793242884] [2023-08-31 01:30:57,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:57,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:30:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:30:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:30:57,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-08-31 01:30:57,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:57,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-08-31 01:30:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:57,753 INFO L130 PetriNetUnfolder]: 964/1423 cut-off events. [2023-08-31 01:30:57,753 INFO L131 PetriNetUnfolder]: For 1843/1843 co-relation queries the response was YES. [2023-08-31 01:30:57,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1423 events. 964/1423 cut-off events. For 1843/1843 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5442 event pairs, 494 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 3579. Up to 1056 conditions per place. [2023-08-31 01:30:57,761 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 3 changer transitions 10/83 dead transitions. [2023-08-31 01:30:57,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 420 flow [2023-08-31 01:30:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1386 transitions. [2023-08-31 01:30:57,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-31 01:30:57,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1386 transitions. [2023-08-31 01:30:57,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1386 transitions. [2023-08-31 01:30:57,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:57,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1386 transitions. [2023-08-31 01:30:57,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,774 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 147 flow. Second operand 5 states and 1386 transitions. [2023-08-31 01:30:57,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 420 flow [2023-08-31 01:30:57,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 409 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 01:30:57,778 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-08-31 01:30:57,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-31 01:30:57,779 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-31 01:30:57,779 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-08-31 01:30:57,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:57,780 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 01:30:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:30:57,780 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 01:30:57,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 31607289, now seen corresponding path program 1 times [2023-08-31 01:30:57,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:57,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123752721] [2023-08-31 01:30:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:57,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:57,857 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 01:30:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123752721] [2023-08-31 01:30:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123752721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269769455] [2023-08-31 01:30:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:57,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-31 01:30:57,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:57,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:57,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-31 01:30:57,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:58,141 INFO L130 PetriNetUnfolder]: 1250/1858 cut-off events. [2023-08-31 01:30:58,141 INFO L131 PetriNetUnfolder]: For 2993/2993 co-relation queries the response was YES. [2023-08-31 01:30:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1858 events. 1250/1858 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8228 event pairs, 82 based on Foata normal form. 42/1511 useless extension candidates. Maximal degree in co-relation 4546. Up to 1135 conditions per place. [2023-08-31 01:30:58,151 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-31 01:30:58,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 413 flow [2023-08-31 01:30:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:30:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:30:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-08-31 01:30:58,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47853535353535354 [2023-08-31 01:30:58,155 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-08-31 01:30:58,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-08-31 01:30:58,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:58,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-08-31 01:30:58,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,162 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 4 states and 1137 transitions. [2023-08-31 01:30:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 413 flow [2023-08-31 01:30:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 404 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 01:30:58,166 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 199 flow [2023-08-31 01:30:58,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-31 01:30:58,167 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-08-31 01:30:58,167 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 199 flow [2023-08-31 01:30:58,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:58,168 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 01:30:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:30:58,168 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 01:30:58,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash 330536063, now seen corresponding path program 2 times [2023-08-31 01:30:58,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:58,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79338278] [2023-08-31 01:30:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:58,247 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 01:30:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:58,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79338278] [2023-08-31 01:30:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79338278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:58,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:58,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:58,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306143290] [2023-08-31 01:30:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:58,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:58,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:58,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-31 01:30:58,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:58,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-31 01:30:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:58,518 INFO L130 PetriNetUnfolder]: 1145/1709 cut-off events. [2023-08-31 01:30:58,518 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-08-31 01:30:58,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1709 events. 1145/1709 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7373 event pairs, 61 based on Foata normal form. 42/1388 useless extension candidates. Maximal degree in co-relation 4435. Up to 1028 conditions per place. [2023-08-31 01:30:58,527 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 72 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-08-31 01:30:58,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 496 flow [2023-08-31 01:30:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:30:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:30:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-08-31 01:30:58,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47769360269360267 [2023-08-31 01:30:58,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-08-31 01:30:58,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-08-31 01:30:58,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:58,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-08-31 01:30:58,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,538 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,538 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 199 flow. Second operand 4 states and 1135 transitions. [2023-08-31 01:30:58,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 496 flow [2023-08-31 01:30:58,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 01:30:58,543 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 284 flow [2023-08-31 01:30:58,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-31 01:30:58,544 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-31 01:30:58,544 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 284 flow [2023-08-31 01:30:58,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:58,545 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 01:30:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:30:58,546 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 01:30:58,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1419436303, now seen corresponding path program 1 times [2023-08-31 01:30:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:58,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502977094] [2023-08-31 01:30:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:58,628 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 01:30:58,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502977094] [2023-08-31 01:30:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502977094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:58,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:58,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475085336] [2023-08-31 01:30:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:58,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:58,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:58,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-31 01:30:58,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:58,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-31 01:30:58,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:58,921 INFO L130 PetriNetUnfolder]: 1135/1699 cut-off events. [2023-08-31 01:30:58,921 INFO L131 PetriNetUnfolder]: For 3195/3195 co-relation queries the response was YES. [2023-08-31 01:30:58,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1699 events. 1135/1699 cut-off events. For 3195/3195 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7225 event pairs, 319 based on Foata normal form. 10/1346 useless extension candidates. Maximal degree in co-relation 4753. Up to 1145 conditions per place. [2023-08-31 01:30:58,929 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 12 changer transitions 2/82 dead transitions. [2023-08-31 01:30:58,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 556 flow [2023-08-31 01:30:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-08-31 01:30:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-08-31 01:30:58,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-08-31 01:30:58,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-08-31 01:30:58,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:58,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-08-31 01:30:58,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,941 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 284 flow. Second operand 5 states and 1393 transitions. [2023-08-31 01:30:58,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 556 flow [2023-08-31 01:30:58,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 554 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 01:30:58,947 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 360 flow [2023-08-31 01:30:58,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-31 01:30:58,947 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-31 01:30:58,948 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 360 flow [2023-08-31 01:30:58,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:58,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:58,948 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 01:30:58,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:30:58,949 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 01:30:58,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 55249505, now seen corresponding path program 2 times [2023-08-31 01:30:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:58,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582007559] [2023-08-31 01:30:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:59,030 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 01:30:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582007559] [2023-08-31 01:30:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582007559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:59,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:59,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498425811] [2023-08-31 01:30:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:59,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-31 01:30:59,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 360 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:59,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-31 01:30:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:59,316 INFO L130 PetriNetUnfolder]: 1199/1801 cut-off events. [2023-08-31 01:30:59,316 INFO L131 PetriNetUnfolder]: For 4165/4165 co-relation queries the response was YES. [2023-08-31 01:30:59,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 1801 events. 1199/1801 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7972 event pairs, 220 based on Foata normal form. 16/1428 useless extension candidates. Maximal degree in co-relation 5147. Up to 1459 conditions per place. [2023-08-31 01:30:59,328 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 64 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-31 01:30:59,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 566 flow [2023-08-31 01:30:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:30:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:30:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1129 transitions. [2023-08-31 01:30:59,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751683501683502 [2023-08-31 01:30:59,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1129 transitions. [2023-08-31 01:30:59,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1129 transitions. [2023-08-31 01:30:59,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:59,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1129 transitions. [2023-08-31 01:30:59,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,340 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,340 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 360 flow. Second operand 4 states and 1129 transitions. [2023-08-31 01:30:59,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 566 flow [2023-08-31 01:30:59,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 541 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 01:30:59,348 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 383 flow [2023-08-31 01:30:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-31 01:30:59,349 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-31 01:30:59,349 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 383 flow [2023-08-31 01:30:59,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:59,350 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 01:30:59,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:30:59,351 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 01:30:59,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -482211297, now seen corresponding path program 3 times [2023-08-31 01:30:59,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648119986] [2023-08-31 01:30:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:59,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:30:59,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:59,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648119986] [2023-08-31 01:30:59,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648119986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:59,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:59,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014286190] [2023-08-31 01:30:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:59,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:59,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-31 01:30:59,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:59,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-31 01:30:59,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:30:59,748 INFO L130 PetriNetUnfolder]: 1128/1686 cut-off events. [2023-08-31 01:30:59,749 INFO L131 PetriNetUnfolder]: For 4559/4559 co-relation queries the response was YES. [2023-08-31 01:30:59,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4950 conditions, 1686 events. 1128/1686 cut-off events. For 4559/4559 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7189 event pairs, 283 based on Foata normal form. 8/1331 useless extension candidates. Maximal degree in co-relation 4931. Up to 1318 conditions per place. [2023-08-31 01:30:59,764 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 73 selfloop transitions, 11 changer transitions 1/85 dead transitions. [2023-08-31 01:30:59,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 652 flow [2023-08-31 01:30:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:30:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:30:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-08-31 01:30:59,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-08-31 01:30:59,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-08-31 01:30:59,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-08-31 01:30:59,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:30:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-08-31 01:30:59,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,775 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 383 flow. Second operand 5 states and 1393 transitions. [2023-08-31 01:30:59,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 652 flow [2023-08-31 01:30:59,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 642 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:30:59,787 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 403 flow [2023-08-31 01:30:59,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-08-31 01:30:59,789 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-08-31 01:30:59,789 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 403 flow [2023-08-31 01:30:59,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:30:59,790 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 01:30:59,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:30:59,790 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 01:30:59,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:30:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1330484071, now seen corresponding path program 4 times [2023-08-31 01:30:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:30:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359606625] [2023-08-31 01:30:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:30:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:30:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:30:59,879 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 01:30:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:30:59,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359606625] [2023-08-31 01:30:59,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359606625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:30:59,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:30:59,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:30:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308208797] [2023-08-31 01:30:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:30:59,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:30:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:30:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:30:59,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:30:59,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-08-31 01:30:59,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:30:59,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:30:59,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-08-31 01:30:59,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:00,171 INFO L130 PetriNetUnfolder]: 1126/1690 cut-off events. [2023-08-31 01:31:00,171 INFO L131 PetriNetUnfolder]: For 5489/5489 co-relation queries the response was YES. [2023-08-31 01:31:00,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 1690 events. 1126/1690 cut-off events. For 5489/5489 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7250 event pairs, 240 based on Foata normal form. 14/1337 useless extension candidates. Maximal degree in co-relation 4975. Up to 1444 conditions per place. [2023-08-31 01:31:00,182 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 7 changer transitions 9/84 dead transitions. [2023-08-31 01:31:00,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 650 flow [2023-08-31 01:31:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:31:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:31:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1125 transitions. [2023-08-31 01:31:00,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2023-08-31 01:31:00,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1125 transitions. [2023-08-31 01:31:00,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1125 transitions. [2023-08-31 01:31:00,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:00,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1125 transitions. [2023-08-31 01:31:00,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,193 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 403 flow. Second operand 4 states and 1125 transitions. [2023-08-31 01:31:00,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 650 flow [2023-08-31 01:31:00,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 616 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 01:31:00,201 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 364 flow [2023-08-31 01:31:00,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-31 01:31:00,202 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-08-31 01:31:00,203 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 364 flow [2023-08-31 01:31:00,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:00,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:00,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:31:00,204 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 01:31:00,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1564960603, now seen corresponding path program 3 times [2023-08-31 01:31:00,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:00,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673794233] [2023-08-31 01:31:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:00,286 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 01:31:00,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:00,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673794233] [2023-08-31 01:31:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673794233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:31:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:31:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080388285] [2023-08-31 01:31:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:00,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:31:00,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:31:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:31:00,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-31 01:31:00,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:00,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-31 01:31:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:00,551 INFO L130 PetriNetUnfolder]: 973/1441 cut-off events. [2023-08-31 01:31:00,551 INFO L131 PetriNetUnfolder]: For 3305/3305 co-relation queries the response was YES. [2023-08-31 01:31:00,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1441 events. 973/1441 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5650 event pairs, 444 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4198. Up to 1130 conditions per place. [2023-08-31 01:31:00,558 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 85 selfloop transitions, 5 changer transitions 4/94 dead transitions. [2023-08-31 01:31:00,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 642 flow [2023-08-31 01:31:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:31:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:31:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1407 transitions. [2023-08-31 01:31:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47373737373737373 [2023-08-31 01:31:00,563 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1407 transitions. [2023-08-31 01:31:00,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1407 transitions. [2023-08-31 01:31:00,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:00,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1407 transitions. [2023-08-31 01:31:00,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.4) internal successors, (1407), 5 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,572 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 364 flow. Second operand 5 states and 1407 transitions. [2023-08-31 01:31:00,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 642 flow [2023-08-31 01:31:00,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 612 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-31 01:31:00,578 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 316 flow [2023-08-31 01:31:00,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-31 01:31:00,579 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-08-31 01:31:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 316 flow [2023-08-31 01:31:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:00,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 01:31:00,581 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 01:31:00,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash -831405779, now seen corresponding path program 4 times [2023-08-31 01:31:00,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:00,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772901582] [2023-08-31 01:31:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:00,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:00,667 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 01:31:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:00,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772901582] [2023-08-31 01:31:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772901582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:00,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:31:00,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:31:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076580215] [2023-08-31 01:31:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:00,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:31:00,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:00,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:31:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:31:00,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-08-31 01:31:00,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:00,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-08-31 01:31:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:00,870 INFO L130 PetriNetUnfolder]: 913/1335 cut-off events. [2023-08-31 01:31:00,870 INFO L131 PetriNetUnfolder]: For 2218/2218 co-relation queries the response was YES. [2023-08-31 01:31:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 1335 events. 913/1335 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5122 event pairs, 191 based on Foata normal form. 16/1054 useless extension candidates. Maximal degree in co-relation 3817. Up to 1209 conditions per place. [2023-08-31 01:31:00,877 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 56 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2023-08-31 01:31:00,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 464 flow [2023-08-31 01:31:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:31:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:31:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-08-31 01:31:00,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718013468013468 [2023-08-31 01:31:00,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-08-31 01:31:00,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-08-31 01:31:00,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:00,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-08-31 01:31:00,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,887 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 316 flow. Second operand 4 states and 1121 transitions. [2023-08-31 01:31:00,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 464 flow [2023-08-31 01:31:00,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 439 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-31 01:31:00,891 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 292 flow [2023-08-31 01:31:00,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-31 01:31:00,892 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-08-31 01:31:00,892 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 292 flow [2023-08-31 01:31:00,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:00,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:00,893 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 01:31:00,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 01:31:00,893 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 01:31:00,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash -262667675, now seen corresponding path program 5 times [2023-08-31 01:31:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:00,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109541090] [2023-08-31 01:31:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:00,966 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 01:31:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109541090] [2023-08-31 01:31:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109541090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:00,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:31:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:31:00,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253284241] [2023-08-31 01:31:00,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:00,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:31:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:31:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:31:01,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-31 01:31:01,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:01,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-31 01:31:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:01,173 INFO L130 PetriNetUnfolder]: 883/1283 cut-off events. [2023-08-31 01:31:01,173 INFO L131 PetriNetUnfolder]: For 1307/1307 co-relation queries the response was YES. [2023-08-31 01:31:01,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1283 events. 883/1283 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4715 event pairs, 497 based on Foata normal form. 4/1004 useless extension candidates. Maximal degree in co-relation 3679. Up to 1269 conditions per place. [2023-08-31 01:31:01,180 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 47 selfloop transitions, 0 changer transitions 8/55 dead transitions. [2023-08-31 01:31:01,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 398 flow [2023-08-31 01:31:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:31:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:31:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1103 transitions. [2023-08-31 01:31:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642255892255892 [2023-08-31 01:31:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1103 transitions. [2023-08-31 01:31:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1103 transitions. [2023-08-31 01:31:01,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:01,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1103 transitions. [2023-08-31 01:31:01,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.75) internal successors, (1103), 4 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,190 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 292 flow. Second operand 4 states and 1103 transitions. [2023-08-31 01:31:01,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 398 flow [2023-08-31 01:31:01,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 377 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 01:31:01,193 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 235 flow [2023-08-31 01:31:01,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-08-31 01:31:01,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-08-31 01:31:01,194 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 235 flow [2023-08-31 01:31:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:01,195 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 01:31:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 01:31:01,195 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 01:31:01,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1310580011, now seen corresponding path program 5 times [2023-08-31 01:31:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917777931] [2023-08-31 01:31:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:01,282 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 01:31:01,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917777931] [2023-08-31 01:31:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917777931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:01,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:31:01,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:31:01,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309795179] [2023-08-31 01:31:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:01,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:31:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:31:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:31:01,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-08-31 01:31:01,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:01,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-08-31 01:31:01,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:01,477 INFO L130 PetriNetUnfolder]: 803/1151 cut-off events. [2023-08-31 01:31:01,478 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2023-08-31 01:31:01,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1151 events. 803/1151 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3967 event pairs, 444 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 3204. Up to 1130 conditions per place. [2023-08-31 01:31:01,483 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 44 selfloop transitions, 0 changer transitions 10/54 dead transitions. [2023-08-31 01:31:01,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 344 flow [2023-08-31 01:31:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:31:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:31:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1104 transitions. [2023-08-31 01:31:01,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-08-31 01:31:01,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1104 transitions. [2023-08-31 01:31:01,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1104 transitions. [2023-08-31 01:31:01,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:01,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1104 transitions. [2023-08-31 01:31:01,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,493 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 235 flow. Second operand 4 states and 1104 transitions. [2023-08-31 01:31:01,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 344 flow [2023-08-31 01:31:01,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 341 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 01:31:01,496 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-08-31 01:31:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-31 01:31:01,496 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-31 01:31:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-08-31 01:31:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:01,497 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 01:31:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:31:01,497 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 01:31:01,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1757760381, now seen corresponding path program 1 times [2023-08-31 01:31:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087630786] [2023-08-31 01:31:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:02,222 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 01:31:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087630786] [2023-08-31 01:31:02,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087630786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:02,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:31:02,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:31:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750523957] [2023-08-31 01:31:02,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:02,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:31:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:31:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:31:02,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 594 [2023-08-31 01:31:02,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:02,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:02,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 594 [2023-08-31 01:31:02,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:03,426 INFO L130 PetriNetUnfolder]: 3096/4436 cut-off events. [2023-08-31 01:31:03,426 INFO L131 PetriNetUnfolder]: For 3284/3284 co-relation queries the response was YES. [2023-08-31 01:31:03,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 4436 events. 3096/4436 cut-off events. For 3284/3284 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20444 event pairs, 1032 based on Foata normal form. 1/3506 useless extension candidates. Maximal degree in co-relation 12384. Up to 693 conditions per place. [2023-08-31 01:31:03,444 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 219 selfloop transitions, 28 changer transitions 7/254 dead transitions. [2023-08-31 01:31:03,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 254 transitions, 1636 flow [2023-08-31 01:31:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:31:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:31:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2666 transitions. [2023-08-31 01:31:03,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44882154882154884 [2023-08-31 01:31:03,452 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2666 transitions. [2023-08-31 01:31:03,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2666 transitions. [2023-08-31 01:31:03,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:03,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2666 transitions. [2023-08-31 01:31:03,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 266.6) internal successors, (2666), 10 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:03,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:03,468 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:03,468 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 10 states and 2666 transitions. [2023-08-31 01:31:03,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 254 transitions, 1636 flow [2023-08-31 01:31:03,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 254 transitions, 1622 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-31 01:31:03,474 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 421 flow [2023-08-31 01:31:03,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=421, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-31 01:31:03,475 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-08-31 01:31:03,475 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 421 flow [2023-08-31 01:31:03,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:03,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:03,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:03,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 01:31:03,476 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 01:31:03,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -493399717, now seen corresponding path program 1 times [2023-08-31 01:31:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:03,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839021680] [2023-08-31 01:31:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:03,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839021680] [2023-08-31 01:31:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839021680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774566210] [2023-08-31 01:31:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:03,677 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 01:31:03,697 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 01:31:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:31:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:04,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:31:04,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:31:04,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:31:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774566210] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:07,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:31:07,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-31 01:31:07,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570466667] [2023-08-31 01:31:07,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:07,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:31:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:31:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:31:08,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:31:08,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:08,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:08,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:31:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:11,797 INFO L130 PetriNetUnfolder]: 6090/8974 cut-off events. [2023-08-31 01:31:11,797 INFO L131 PetriNetUnfolder]: For 10029/10029 co-relation queries the response was YES. [2023-08-31 01:31:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28590 conditions, 8974 events. 6090/8974 cut-off events. For 10029/10029 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50237 event pairs, 600 based on Foata normal form. 4/8079 useless extension candidates. Maximal degree in co-relation 28574. Up to 1372 conditions per place. [2023-08-31 01:31:11,848 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 380 selfloop transitions, 101 changer transitions 27/508 dead transitions. [2023-08-31 01:31:11,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 508 transitions, 3487 flow [2023-08-31 01:31:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:31:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:31:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5322 transitions. [2023-08-31 01:31:11,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725436179981633 [2023-08-31 01:31:11,860 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5322 transitions. [2023-08-31 01:31:11,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5322 transitions. [2023-08-31 01:31:11,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:11,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5322 transitions. [2023-08-31 01:31:11,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 241.9090909090909) internal successors, (5322), 22 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:11,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:11,886 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:11,886 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 421 flow. Second operand 22 states and 5322 transitions. [2023-08-31 01:31:11,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 508 transitions, 3487 flow [2023-08-31 01:31:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 508 transitions, 3485 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 01:31:11,905 INFO L231 Difference]: Finished difference. Result has 105 places, 173 transitions, 1537 flow [2023-08-31 01:31:11,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1537, PETRI_PLACES=105, PETRI_TRANSITIONS=173} [2023-08-31 01:31:11,906 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2023-08-31 01:31:11,906 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 173 transitions, 1537 flow [2023-08-31 01:31:11,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:11,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:11,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:11,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:31:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:12,113 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 01:31:12,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:12,114 INFO L85 PathProgramCache]: Analyzing trace with hash 773516305, now seen corresponding path program 2 times [2023-08-31 01:31:12,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:12,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190056600] [2023-08-31 01:31:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:12,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:12,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190056600] [2023-08-31 01:31:12,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190056600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:12,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006074519] [2023-08-31 01:31:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:31:12,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:12,337 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 01:31:12,376 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 01:31:12,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:31:12,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:31:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 01:31:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:13,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:31:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006074519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:13,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:31:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:31:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893031521] [2023-08-31 01:31:13,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:31:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:31:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:31:13,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:31:13,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 173 transitions, 1537 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:13,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:13,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:31:13,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:15,386 INFO L130 PetriNetUnfolder]: 6398/9419 cut-off events. [2023-08-31 01:31:15,387 INFO L131 PetriNetUnfolder]: For 39822/39822 co-relation queries the response was YES. [2023-08-31 01:31:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 9419 events. 6398/9419 cut-off events. For 39822/39822 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52722 event pairs, 912 based on Foata normal form. 49/8974 useless extension candidates. Maximal degree in co-relation 39955. Up to 3793 conditions per place. [2023-08-31 01:31:15,444 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 238 selfloop transitions, 124 changer transitions 10/372 dead transitions. [2023-08-31 01:31:15,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 372 transitions, 3591 flow [2023-08-31 01:31:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:31:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:31:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4004 transitions. [2023-08-31 01:31:15,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2023-08-31 01:31:15,450 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4004 transitions. [2023-08-31 01:31:15,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4004 transitions. [2023-08-31 01:31:15,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:15,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4004 transitions. [2023-08-31 01:31:15,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 250.25) internal successors, (4004), 16 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:15,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:15,468 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:15,468 INFO L175 Difference]: Start difference. First operand has 105 places, 173 transitions, 1537 flow. Second operand 16 states and 4004 transitions. [2023-08-31 01:31:15,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 372 transitions, 3591 flow [2023-08-31 01:31:15,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 372 transitions, 3511 flow, removed 40 selfloop flow, removed 0 redundant places. [2023-08-31 01:31:15,628 INFO L231 Difference]: Finished difference. Result has 129 places, 220 transitions, 2423 flow [2023-08-31 01:31:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2423, PETRI_PLACES=129, PETRI_TRANSITIONS=220} [2023-08-31 01:31:15,629 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-08-31 01:31:15,629 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 220 transitions, 2423 flow [2023-08-31 01:31:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:15,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:15,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:31:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-31 01:31:15,836 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 01:31:15,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1430753600, now seen corresponding path program 1 times [2023-08-31 01:31:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372503134] [2023-08-31 01:31:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372503134] [2023-08-31 01:31:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372503134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419562173] [2023-08-31 01:31:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:16,037 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 01:31:16,064 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 01:31:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:31:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:16,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:31:16,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-31 01:31:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:31:17,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:31:17,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:31:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419562173] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:19,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:31:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-31 01:31:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14405567] [2023-08-31 01:31:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:31:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:31:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:31:20,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:31:20,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 220 transitions, 2423 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:20,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:20,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:31:20,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:24,549 INFO L130 PetriNetUnfolder]: 9862/14530 cut-off events. [2023-08-31 01:31:24,549 INFO L131 PetriNetUnfolder]: For 86655/86655 co-relation queries the response was YES. [2023-08-31 01:31:24,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67775 conditions, 14530 events. 9862/14530 cut-off events. For 86655/86655 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 87462 event pairs, 613 based on Foata normal form. 5/13765 useless extension candidates. Maximal degree in co-relation 67732. Up to 3294 conditions per place. [2023-08-31 01:31:24,639 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 297 selfloop transitions, 214 changer transitions 16/527 dead transitions. [2023-08-31 01:31:24,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 527 transitions, 5996 flow [2023-08-31 01:31:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:31:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:31:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3630 transitions. [2023-08-31 01:31:24,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-31 01:31:24,648 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3630 transitions. [2023-08-31 01:31:24,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3630 transitions. [2023-08-31 01:31:24,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:24,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3630 transitions. [2023-08-31 01:31:24,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 242.0) internal successors, (3630), 15 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:24,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:24,667 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:24,667 INFO L175 Difference]: Start difference. First operand has 129 places, 220 transitions, 2423 flow. Second operand 15 states and 3630 transitions. [2023-08-31 01:31:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 527 transitions, 5996 flow [2023-08-31 01:31:25,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 527 transitions, 5296 flow, removed 274 selfloop flow, removed 8 redundant places. [2023-08-31 01:31:25,201 INFO L231 Difference]: Finished difference. Result has 146 places, 316 transitions, 3915 flow [2023-08-31 01:31:25,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3915, PETRI_PLACES=146, PETRI_TRANSITIONS=316} [2023-08-31 01:31:25,202 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-08-31 01:31:25,202 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 316 transitions, 3915 flow [2023-08-31 01:31:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:25,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:25,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:25,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 01:31:25,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:25,409 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 01:31:25,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1629821531, now seen corresponding path program 3 times [2023-08-31 01:31:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017904668] [2023-08-31 01:31:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017904668] [2023-08-31 01:31:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017904668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215461458] [2023-08-31 01:31:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:31:25,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:25,600 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 01:31:25,625 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 01:31:25,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:31:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:31:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:31:25,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:26,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:31:26,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215461458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:26,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:31:26,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:31:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510035253] [2023-08-31 01:31:26,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:31:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:31:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:31:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-08-31 01:31:26,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 316 transitions, 3915 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:26,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:26,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-08-31 01:31:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:29,131 INFO L130 PetriNetUnfolder]: 9888/14677 cut-off events. [2023-08-31 01:31:29,131 INFO L131 PetriNetUnfolder]: For 112504/112504 co-relation queries the response was YES. [2023-08-31 01:31:29,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71383 conditions, 14677 events. 9888/14677 cut-off events. For 112504/112504 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 89023 event pairs, 1511 based on Foata normal form. 52/13927 useless extension candidates. Maximal degree in co-relation 71333. Up to 6687 conditions per place. [2023-08-31 01:31:29,429 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 254 selfloop transitions, 203 changer transitions 15/472 dead transitions. [2023-08-31 01:31:29,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 472 transitions, 6115 flow [2023-08-31 01:31:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:31:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:31:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3509 transitions. [2023-08-31 01:31:29,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421957671957672 [2023-08-31 01:31:29,440 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3509 transitions. [2023-08-31 01:31:29,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3509 transitions. [2023-08-31 01:31:29,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:29,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3509 transitions. [2023-08-31 01:31:29,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 250.64285714285714) internal successors, (3509), 14 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:29,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:29,453 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:29,453 INFO L175 Difference]: Start difference. First operand has 146 places, 316 transitions, 3915 flow. Second operand 14 states and 3509 transitions. [2023-08-31 01:31:29,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 472 transitions, 6115 flow [2023-08-31 01:31:30,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 472 transitions, 5957 flow, removed 79 selfloop flow, removed 0 redundant places. [2023-08-31 01:31:30,201 INFO L231 Difference]: Finished difference. Result has 167 places, 350 transitions, 4907 flow [2023-08-31 01:31:30,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4907, PETRI_PLACES=167, PETRI_TRANSITIONS=350} [2023-08-31 01:31:30,202 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 129 predicate places. [2023-08-31 01:31:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 350 transitions, 4907 flow [2023-08-31 01:31:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:30,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:31:30,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:30,409 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 01:31:30,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1609186473, now seen corresponding path program 1 times [2023-08-31 01:31:30,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:30,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667594101] [2023-08-31 01:31:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:30,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:30,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667594101] [2023-08-31 01:31:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667594101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463716508] [2023-08-31 01:31:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:30,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:30,877 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 01:31:30,903 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 01:31:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 01:31:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:31,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:31:31,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:31:31,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:31:32,712 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 01:31:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463716508] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:32,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:31:32,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-08-31 01:31:32,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799120153] [2023-08-31 01:31:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:31:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:31:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:31:33,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-31 01:31:33,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 350 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:33,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:33,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-31 01:31:33,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:37,152 INFO L130 PetriNetUnfolder]: 13447/20065 cut-off events. [2023-08-31 01:31:37,152 INFO L131 PetriNetUnfolder]: For 177684/177684 co-relation queries the response was YES. [2023-08-31 01:31:37,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103138 conditions, 20065 events. 13447/20065 cut-off events. For 177684/177684 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 128669 event pairs, 3272 based on Foata normal form. 114/19117 useless extension candidates. Maximal degree in co-relation 103079. Up to 5325 conditions per place. [2023-08-31 01:31:37,309 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 366 selfloop transitions, 250 changer transitions 39/655 dead transitions. [2023-08-31 01:31:37,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 655 transitions, 9387 flow [2023-08-31 01:31:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:31:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:31:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3949 transitions. [2023-08-31 01:31:37,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41550925925925924 [2023-08-31 01:31:37,315 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3949 transitions. [2023-08-31 01:31:37,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3949 transitions. [2023-08-31 01:31:37,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:37,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3949 transitions. [2023-08-31 01:31:37,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 246.8125) internal successors, (3949), 16 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:37,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:37,329 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:37,329 INFO L175 Difference]: Start difference. First operand has 167 places, 350 transitions, 4907 flow. Second operand 16 states and 3949 transitions. [2023-08-31 01:31:37,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 655 transitions, 9387 flow [2023-08-31 01:31:39,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 655 transitions, 8962 flow, removed 120 selfloop flow, removed 7 redundant places. [2023-08-31 01:31:39,009 INFO L231 Difference]: Finished difference. Result has 182 places, 439 transitions, 6604 flow [2023-08-31 01:31:39,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6604, PETRI_PLACES=182, PETRI_TRANSITIONS=439} [2023-08-31 01:31:39,010 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2023-08-31 01:31:39,010 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 439 transitions, 6604 flow [2023-08-31 01:31:39,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:39,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:39,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:39,015 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 01:31:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 01:31:39,211 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 01:31:39,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1006698783, now seen corresponding path program 2 times [2023-08-31 01:31:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477114170] [2023-08-31 01:31:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:39,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477114170] [2023-08-31 01:31:39,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477114170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330139324] [2023-08-31 01:31:39,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:31:39,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:39,698 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 01:31:39,700 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 01:31:39,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:31:39,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:31:39,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:31:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:40,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:31:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330139324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:40,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:31:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-31 01:31:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217961560] [2023-08-31 01:31:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:40,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:31:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:31:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:31:40,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-08-31 01:31:40,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 439 transitions, 6604 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:40,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:40,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-08-31 01:31:40,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:43,961 INFO L130 PetriNetUnfolder]: 13377/19984 cut-off events. [2023-08-31 01:31:43,961 INFO L131 PetriNetUnfolder]: For 185888/185888 co-relation queries the response was YES. [2023-08-31 01:31:44,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105190 conditions, 19984 events. 13377/19984 cut-off events. For 185888/185888 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 128356 event pairs, 2638 based on Foata normal form. 327/19213 useless extension candidates. Maximal degree in co-relation 105125. Up to 8884 conditions per place. [2023-08-31 01:31:44,090 INFO L137 encePairwiseOnDemand]: 582/594 looper letters, 298 selfloop transitions, 284 changer transitions 20/602 dead transitions. [2023-08-31 01:31:44,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 602 transitions, 9626 flow [2023-08-31 01:31:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:31:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:31:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2311 transitions. [2023-08-31 01:31:44,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43228582117471004 [2023-08-31 01:31:44,094 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2311 transitions. [2023-08-31 01:31:44,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2311 transitions. [2023-08-31 01:31:44,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:44,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2311 transitions. [2023-08-31 01:31:44,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.77777777777777) internal successors, (2311), 9 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:44,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:44,101 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:44,101 INFO L175 Difference]: Start difference. First operand has 182 places, 439 transitions, 6604 flow. Second operand 9 states and 2311 transitions. [2023-08-31 01:31:44,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 602 transitions, 9626 flow [2023-08-31 01:31:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 602 transitions, 9395 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-08-31 01:31:46,354 INFO L231 Difference]: Finished difference. Result has 188 places, 484 transitions, 8077 flow [2023-08-31 01:31:46,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=188, PETRI_TRANSITIONS=484} [2023-08-31 01:31:46,355 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-08-31 01:31:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 484 transitions, 8077 flow [2023-08-31 01:31:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:46,362 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 01:31:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:46,563 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 01:31:46,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1314180504, now seen corresponding path program 2 times [2023-08-31 01:31:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529798454] [2023-08-31 01:31:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:46,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529798454] [2023-08-31 01:31:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529798454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:46,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739900758] [2023-08-31 01:31:46,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:31:46,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:46,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:46,753 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 01:31:46,756 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 01:31:46,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:31:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:31:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 01:31:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:47,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:31:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739900758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:47,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:31:47,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:31:47,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661314562] [2023-08-31 01:31:47,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:31:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:47,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:31:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:31:47,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 594 [2023-08-31 01:31:47,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 484 transitions, 8077 flow. Second operand has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:47,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:47,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 594 [2023-08-31 01:31:47,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:51,885 INFO L130 PetriNetUnfolder]: 15608/22845 cut-off events. [2023-08-31 01:31:51,886 INFO L131 PetriNetUnfolder]: For 218392/218392 co-relation queries the response was YES. [2023-08-31 01:31:51,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128918 conditions, 22845 events. 15608/22845 cut-off events. For 218392/218392 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 143637 event pairs, 2781 based on Foata normal form. 14/21593 useless extension candidates. Maximal degree in co-relation 128851. Up to 12753 conditions per place. [2023-08-31 01:31:52,059 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 403 selfloop transitions, 294 changer transitions 14/711 dead transitions. [2023-08-31 01:31:52,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 711 transitions, 11946 flow [2023-08-31 01:31:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:31:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:31:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3492 transitions. [2023-08-31 01:31:52,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-08-31 01:31:52,064 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3492 transitions. [2023-08-31 01:31:52,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3492 transitions. [2023-08-31 01:31:52,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:31:52,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3492 transitions. [2023-08-31 01:31:52,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 249.42857142857142) internal successors, (3492), 14 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:52,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:52,075 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:52,075 INFO L175 Difference]: Start difference. First operand has 188 places, 484 transitions, 8077 flow. Second operand 14 states and 3492 transitions. [2023-08-31 01:31:52,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 711 transitions, 11946 flow [2023-08-31 01:31:53,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 711 transitions, 11287 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-31 01:31:53,904 INFO L231 Difference]: Finished difference. Result has 201 places, 558 transitions, 9468 flow [2023-08-31 01:31:53,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9468, PETRI_PLACES=201, PETRI_TRANSITIONS=558} [2023-08-31 01:31:53,904 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 163 predicate places. [2023-08-31 01:31:53,905 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 558 transitions, 9468 flow [2023-08-31 01:31:53,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:53,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:31:53,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:31:53,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 01:31:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:54,106 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 01:31:54,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:31:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 141783206, now seen corresponding path program 3 times [2023-08-31 01:31:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:31:54,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727328071] [2023-08-31 01:31:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:31:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:31:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:31:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:31:54,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:31:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727328071] [2023-08-31 01:31:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727328071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:31:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234320546] [2023-08-31 01:31:54,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:31:54,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:31:54,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:31:54,289 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 01:31:54,318 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 01:31:54,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:31:54,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:31:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:31:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:31:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:31:54,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:31:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234320546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:31:54,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:31:54,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:31:54,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143447428] [2023-08-31 01:31:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:31:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:31:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:31:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:31:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:31:55,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:31:55,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 558 transitions, 9468 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:31:55,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:31:55,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:31:55,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:31:59,968 INFO L130 PetriNetUnfolder]: 15712/23102 cut-off events. [2023-08-31 01:31:59,969 INFO L131 PetriNetUnfolder]: For 239582/239582 co-relation queries the response was YES. [2023-08-31 01:32:00,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130517 conditions, 23102 events. 15712/23102 cut-off events. For 239582/239582 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 146872 event pairs, 2491 based on Foata normal form. 126/21942 useless extension candidates. Maximal degree in co-relation 130446. Up to 12194 conditions per place. [2023-08-31 01:32:00,179 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 412 selfloop transitions, 329 changer transitions 10/751 dead transitions. [2023-08-31 01:32:00,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 751 transitions, 12718 flow [2023-08-31 01:32:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:32:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:32:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3756 transitions. [2023-08-31 01:32:00,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42154882154882156 [2023-08-31 01:32:00,184 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3756 transitions. [2023-08-31 01:32:00,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3756 transitions. [2023-08-31 01:32:00,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:32:00,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3756 transitions. [2023-08-31 01:32:00,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.4) internal successors, (3756), 15 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:00,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:00,198 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:00,198 INFO L175 Difference]: Start difference. First operand has 201 places, 558 transitions, 9468 flow. Second operand 15 states and 3756 transitions. [2023-08-31 01:32:00,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 751 transitions, 12718 flow [2023-08-31 01:32:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 751 transitions, 12595 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-31 01:32:02,432 INFO L231 Difference]: Finished difference. Result has 216 places, 594 transitions, 10798 flow [2023-08-31 01:32:02,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=9301, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10798, PETRI_PLACES=216, PETRI_TRANSITIONS=594} [2023-08-31 01:32:02,433 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 178 predicate places. [2023-08-31 01:32:02,433 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 594 transitions, 10798 flow [2023-08-31 01:32:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:02,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:32:02,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:32:02,439 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 01:32:02,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 01:32:02,634 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 01:32:02,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:32:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1833563647, now seen corresponding path program 3 times [2023-08-31 01:32:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:32:02,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124431173] [2023-08-31 01:32:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:32:02,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:32:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:32:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:03,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:32:03,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124431173] [2023-08-31 01:32:03,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124431173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:03,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766552949] [2023-08-31 01:32:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:32:03,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:32:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:32:03,329 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 01:32:03,360 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 01:32:03,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:32:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:32:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:32:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:32:04,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:04,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-31 01:32:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:32:04,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:32:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766552949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:32:04,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:32:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2023-08-31 01:32:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815821750] [2023-08-31 01:32:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:32:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:32:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:32:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:32:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:32:04,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 594 [2023-08-31 01:32:04,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 594 transitions, 10798 flow. Second operand has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:04,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:32:04,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 594 [2023-08-31 01:32:04,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:32:09,652 INFO L130 PetriNetUnfolder]: 16812/24689 cut-off events. [2023-08-31 01:32:09,653 INFO L131 PetriNetUnfolder]: For 315246/315246 co-relation queries the response was YES. [2023-08-31 01:32:09,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147547 conditions, 24689 events. 16812/24689 cut-off events. For 315246/315246 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 158717 event pairs, 2801 based on Foata normal form. 249/23544 useless extension candidates. Maximal degree in co-relation 147471. Up to 15629 conditions per place. [2023-08-31 01:32:09,873 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 474 selfloop transitions, 366 changer transitions 14/854 dead transitions. [2023-08-31 01:32:09,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 854 transitions, 15237 flow [2023-08-31 01:32:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:32:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:32:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5039 transitions. [2023-08-31 01:32:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241582491582492 [2023-08-31 01:32:09,880 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5039 transitions. [2023-08-31 01:32:09,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5039 transitions. [2023-08-31 01:32:09,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:32:09,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5039 transitions. [2023-08-31 01:32:09,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 251.95) internal successors, (5039), 20 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:09,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:09,897 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:09,897 INFO L175 Difference]: Start difference. First operand has 216 places, 594 transitions, 10798 flow. Second operand 20 states and 5039 transitions. [2023-08-31 01:32:09,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 854 transitions, 15237 flow [2023-08-31 01:32:12,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 854 transitions, 14881 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-08-31 01:32:12,751 INFO L231 Difference]: Finished difference. Result has 240 places, 695 transitions, 13614 flow [2023-08-31 01:32:12,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13614, PETRI_PLACES=240, PETRI_TRANSITIONS=695} [2023-08-31 01:32:12,752 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 202 predicate places. [2023-08-31 01:32:12,752 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 695 transitions, 13614 flow [2023-08-31 01:32:12,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:12,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:32:12,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:32:12,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:32:12,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 01:32:12,957 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 01:32:12,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:32:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1459391252, now seen corresponding path program 4 times [2023-08-31 01:32:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:32:12,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793285456] [2023-08-31 01:32:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:32:12,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:32:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:32:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:32:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793285456] [2023-08-31 01:32:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793285456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092795886] [2023-08-31 01:32:13,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:32:13,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:32:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:32:13,144 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 01:32:13,157 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 01:32:13,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:32:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:32:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:32:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:32:13,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:13,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-31 01:32:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:32:14,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:14,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:32:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:32:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092795886] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:15,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:32:15,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-31 01:32:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412863433] [2023-08-31 01:32:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:32:15,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:32:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:32:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:32:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:32:16,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:32:16,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 695 transitions, 13614 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:16,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:32:16,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:32:16,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:32:24,055 INFO L130 PetriNetUnfolder]: 22729/33687 cut-off events. [2023-08-31 01:32:24,056 INFO L131 PetriNetUnfolder]: For 578241/578241 co-relation queries the response was YES. [2023-08-31 01:32:24,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225149 conditions, 33687 events. 22729/33687 cut-off events. For 578241/578241 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 231917 event pairs, 1601 based on Foata normal form. 19/31800 useless extension candidates. Maximal degree in co-relation 225062. Up to 9833 conditions per place. [2023-08-31 01:32:24,403 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 647 selfloop transitions, 421 changer transitions 29/1097 dead transitions. [2023-08-31 01:32:24,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1097 transitions, 21307 flow [2023-08-31 01:32:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:32:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:32:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3383 transitions. [2023-08-31 01:32:24,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068061568061568 [2023-08-31 01:32:24,406 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3383 transitions. [2023-08-31 01:32:24,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3383 transitions. [2023-08-31 01:32:24,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:32:24,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3383 transitions. [2023-08-31 01:32:24,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 241.64285714285714) internal successors, (3383), 14 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:24,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:24,416 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:24,416 INFO L175 Difference]: Start difference. First operand has 240 places, 695 transitions, 13614 flow. Second operand 14 states and 3383 transitions. [2023-08-31 01:32:24,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1097 transitions, 21307 flow [2023-08-31 01:32:30,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1097 transitions, 20587 flow, removed 67 selfloop flow, removed 6 redundant places. [2023-08-31 01:32:30,943 INFO L231 Difference]: Finished difference. Result has 253 places, 804 transitions, 16593 flow [2023-08-31 01:32:30,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16593, PETRI_PLACES=253, PETRI_TRANSITIONS=804} [2023-08-31 01:32:30,944 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-08-31 01:32:30,944 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 804 transitions, 16593 flow [2023-08-31 01:32:30,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:30,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:32:30,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:32:30,952 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 01:32:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 01:32:31,149 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 01:32:31,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:32:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1550042883, now seen corresponding path program 4 times [2023-08-31 01:32:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:32:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274516973] [2023-08-31 01:32:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:32:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:32:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:32:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:32:31,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274516973] [2023-08-31 01:32:31,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274516973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:31,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790066555] [2023-08-31 01:32:31,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:32:31,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:32:31,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:32:31,345 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 01:32:31,373 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 01:32:31,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:32:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:32:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 01:32:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:32:31,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:31,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 78 [2023-08-31 01:32:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:31,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:32:32,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:32,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:32:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:32:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790066555] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:32,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:32:32,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-31 01:32:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020991652] [2023-08-31 01:32:32,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:32:32,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:32:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:32:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:32:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:32:33,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:32:33,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 804 transitions, 16593 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:33,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:32:33,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:32:33,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:32:41,357 INFO L130 PetriNetUnfolder]: 22650/33576 cut-off events. [2023-08-31 01:32:41,357 INFO L131 PetriNetUnfolder]: For 730957/730957 co-relation queries the response was YES. [2023-08-31 01:32:41,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233740 conditions, 33576 events. 22650/33576 cut-off events. For 730957/730957 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 230581 event pairs, 2937 based on Foata normal form. 2/31672 useless extension candidates. Maximal degree in co-relation 233648. Up to 13072 conditions per place. [2023-08-31 01:32:41,763 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 575 selfloop transitions, 431 changer transitions 9/1015 dead transitions. [2023-08-31 01:32:41,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1015 transitions, 21100 flow [2023-08-31 01:32:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:32:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:32:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3142 transitions. [2023-08-31 01:32:41,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068894068894069 [2023-08-31 01:32:41,766 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3142 transitions. [2023-08-31 01:32:41,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3142 transitions. [2023-08-31 01:32:41,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:32:41,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3142 transitions. [2023-08-31 01:32:41,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.69230769230768) internal successors, (3142), 13 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:41,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:41,774 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:41,774 INFO L175 Difference]: Start difference. First operand has 253 places, 804 transitions, 16593 flow. Second operand 13 states and 3142 transitions. [2023-08-31 01:32:41,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1015 transitions, 21100 flow [2023-08-31 01:32:51,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1015 transitions, 20699 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-08-31 01:32:51,801 INFO L231 Difference]: Finished difference. Result has 260 places, 808 transitions, 17294 flow [2023-08-31 01:32:51,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16309, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17294, PETRI_PLACES=260, PETRI_TRANSITIONS=808} [2023-08-31 01:32:51,802 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-31 01:32:51,802 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 808 transitions, 17294 flow [2023-08-31 01:32:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:51,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:32:51,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:32:51,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 01:32:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 01:32:52,005 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 01:32:52,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:32:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash 749821040, now seen corresponding path program 5 times [2023-08-31 01:32:52,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:32:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965287424] [2023-08-31 01:32:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:32:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:32:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:32:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:32:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965287424] [2023-08-31 01:32:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965287424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711579482] [2023-08-31 01:32:52,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:32:52,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:32:52,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:32:52,179 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 01:32:52,180 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 01:32:52,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:32:52,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:32:52,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:32:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:32:52,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:52,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-31 01:32:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:32:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:32:53,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:32:53,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:32:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:32:54,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711579482] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:32:54,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:32:54,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-31 01:32:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415592383] [2023-08-31 01:32:54,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:32:54,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:32:54,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:32:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:32:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:32:54,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:32:54,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 808 transitions, 17294 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:32:54,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:32:54,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:32:54,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:33:03,460 INFO L130 PetriNetUnfolder]: 23804/35379 cut-off events. [2023-08-31 01:33:03,460 INFO L131 PetriNetUnfolder]: For 714179/714179 co-relation queries the response was YES. [2023-08-31 01:33:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247453 conditions, 35379 events. 23804/35379 cut-off events. For 714179/714179 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 246156 event pairs, 2771 based on Foata normal form. 21/33406 useless extension candidates. Maximal degree in co-relation 247361. Up to 15046 conditions per place. [2023-08-31 01:33:03,843 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 635 selfloop transitions, 402 changer transitions 28/1065 dead transitions. [2023-08-31 01:33:03,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1065 transitions, 22815 flow [2023-08-31 01:33:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:33:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:33:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3138 transitions. [2023-08-31 01:33:03,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063714063714064 [2023-08-31 01:33:03,854 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3138 transitions. [2023-08-31 01:33:03,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3138 transitions. [2023-08-31 01:33:03,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:33:03,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3138 transitions. [2023-08-31 01:33:03,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.3846153846154) internal successors, (3138), 13 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:03,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:03,867 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:03,867 INFO L175 Difference]: Start difference. First operand has 260 places, 808 transitions, 17294 flow. Second operand 13 states and 3138 transitions. [2023-08-31 01:33:03,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1065 transitions, 22815 flow [2023-08-31 01:33:11,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1065 transitions, 21880 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-08-31 01:33:11,458 INFO L231 Difference]: Finished difference. Result has 265 places, 851 transitions, 18672 flow [2023-08-31 01:33:11,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16449, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18672, PETRI_PLACES=265, PETRI_TRANSITIONS=851} [2023-08-31 01:33:11,459 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 227 predicate places. [2023-08-31 01:33:11,459 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 851 transitions, 18672 flow [2023-08-31 01:33:11,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:11,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:33:11,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:33:11,468 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 01:33:11,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:33:11,665 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 01:33:11,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:33:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1153144357, now seen corresponding path program 5 times [2023-08-31 01:33:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:33:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839489459] [2023-08-31 01:33:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:33:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:33:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:33:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:33:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:33:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839489459] [2023-08-31 01:33:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839489459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:33:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700741127] [2023-08-31 01:33:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:33:11,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:33:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:33:11,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:33:11,841 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 01:33:11,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:33:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:33:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 01:33:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:33:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:33:12,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:33:12,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:33:12,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:33:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:33:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700741127] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:33:13,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:33:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-08-31 01:33:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094812784] [2023-08-31 01:33:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:33:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:33:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:33:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:33:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:33:13,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 594 [2023-08-31 01:33:13,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 851 transitions, 18672 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:13,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:33:13,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 594 [2023-08-31 01:33:13,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:33:22,234 INFO L130 PetriNetUnfolder]: 23805/35466 cut-off events. [2023-08-31 01:33:22,235 INFO L131 PetriNetUnfolder]: For 837453/837453 co-relation queries the response was YES. [2023-08-31 01:33:22,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255607 conditions, 35466 events. 23805/35466 cut-off events. For 837453/837453 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 247607 event pairs, 3077 based on Foata normal form. 6/33450 useless extension candidates. Maximal degree in co-relation 255510. Up to 13545 conditions per place. [2023-08-31 01:33:22,722 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 672 selfloop transitions, 403 changer transitions 19/1094 dead transitions. [2023-08-31 01:33:22,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1094 transitions, 24066 flow [2023-08-31 01:33:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:33:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:33:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3152 transitions. [2023-08-31 01:33:22,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081844081844082 [2023-08-31 01:33:22,724 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3152 transitions. [2023-08-31 01:33:22,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3152 transitions. [2023-08-31 01:33:22,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:33:22,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3152 transitions. [2023-08-31 01:33:22,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.46153846153845) internal successors, (3152), 13 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:22,731 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:22,731 INFO L175 Difference]: Start difference. First operand has 265 places, 851 transitions, 18672 flow. Second operand 13 states and 3152 transitions. [2023-08-31 01:33:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1094 transitions, 24066 flow [2023-08-31 01:33:34,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1094 transitions, 23313 flow, removed 167 selfloop flow, removed 8 redundant places. [2023-08-31 01:33:34,384 INFO L231 Difference]: Finished difference. Result has 274 places, 878 transitions, 19662 flow [2023-08-31 01:33:34,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18078, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19662, PETRI_PLACES=274, PETRI_TRANSITIONS=878} [2023-08-31 01:33:34,384 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 236 predicate places. [2023-08-31 01:33:34,385 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 878 transitions, 19662 flow [2023-08-31 01:33:34,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:34,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:33:34,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:33:34,390 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 01:33:34,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-31 01:33:34,589 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:33:34,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:33:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1760226384, now seen corresponding path program 6 times [2023-08-31 01:33:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:33:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475920107] [2023-08-31 01:33:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:33:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:33:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:33:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:33:34,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:33:34,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475920107] [2023-08-31 01:33:34,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475920107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:33:34,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087403538] [2023-08-31 01:33:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:33:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:33:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:33:34,754 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 01:33:34,755 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 01:33:34,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 01:33:34,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:33:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:33:34,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:33:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:33:35,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:33:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087403538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:33:35,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:33:35,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:33:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058621734] [2023-08-31 01:33:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:33:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:33:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:33:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:33:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:33:35,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:33:35,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 878 transitions, 19662 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:35,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:33:35,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:33:35,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:33:43,503 INFO L130 PetriNetUnfolder]: 23600/35175 cut-off events. [2023-08-31 01:33:43,504 INFO L131 PetriNetUnfolder]: For 838763/838763 co-relation queries the response was YES. [2023-08-31 01:33:44,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254979 conditions, 35175 events. 23600/35175 cut-off events. For 838763/838763 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 245469 event pairs, 4435 based on Foata normal form. 42/33199 useless extension candidates. Maximal degree in co-relation 254879. Up to 21113 conditions per place. [2023-08-31 01:33:44,266 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 542 selfloop transitions, 495 changer transitions 9/1046 dead transitions. [2023-08-31 01:33:44,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1046 transitions, 23362 flow [2023-08-31 01:33:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:33:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:33:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3761 transitions. [2023-08-31 01:33:44,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42210998877665545 [2023-08-31 01:33:44,273 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3761 transitions. [2023-08-31 01:33:44,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3761 transitions. [2023-08-31 01:33:44,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:33:44,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3761 transitions. [2023-08-31 01:33:44,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.73333333333332) internal successors, (3761), 15 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:44,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:44,286 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:44,287 INFO L175 Difference]: Start difference. First operand has 274 places, 878 transitions, 19662 flow. Second operand 15 states and 3761 transitions. [2023-08-31 01:33:44,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1046 transitions, 23362 flow [2023-08-31 01:33:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1046 transitions, 22685 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-08-31 01:33:57,656 INFO L231 Difference]: Finished difference. Result has 286 places, 878 transitions, 20243 flow [2023-08-31 01:33:57,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18947, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20243, PETRI_PLACES=286, PETRI_TRANSITIONS=878} [2023-08-31 01:33:57,658 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 248 predicate places. [2023-08-31 01:33:57,658 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 878 transitions, 20243 flow [2023-08-31 01:33:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:57,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:33:57,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:33:57,668 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 01:33:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:33:57,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:33:57,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:33:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1381273835, now seen corresponding path program 6 times [2023-08-31 01:33:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:33:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121312213] [2023-08-31 01:33:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:33:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:33:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:33:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:33:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:33:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121312213] [2023-08-31 01:33:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121312213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:33:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453871735] [2023-08-31 01:33:58,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:33:58,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:33:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:33:58,025 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 01:33:58,027 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 01:33:58,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 01:33:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:33:58,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:33:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:33:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:33:58,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:33:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453871735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:33:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:33:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:33:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146956453] [2023-08-31 01:33:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:33:58,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:33:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:33:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:33:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:33:59,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-08-31 01:33:59,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 878 transitions, 20243 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:33:59,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:33:59,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-08-31 01:33:59,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:34:08,274 INFO L130 PetriNetUnfolder]: 23379/34834 cut-off events. [2023-08-31 01:34:08,274 INFO L131 PetriNetUnfolder]: For 763903/763903 co-relation queries the response was YES. [2023-08-31 01:34:08,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251152 conditions, 34834 events. 23379/34834 cut-off events. For 763903/763903 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 241847 event pairs, 3563 based on Foata normal form. 37/32869 useless extension candidates. Maximal degree in co-relation 251047. Up to 18492 conditions per place. [2023-08-31 01:34:08,651 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 447 selfloop transitions, 547 changer transitions 11/1005 dead transitions. [2023-08-31 01:34:08,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1005 transitions, 23446 flow [2023-08-31 01:34:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:34:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:34:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3263 transitions. [2023-08-31 01:34:08,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225589225589226 [2023-08-31 01:34:08,654 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3263 transitions. [2023-08-31 01:34:08,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3263 transitions. [2023-08-31 01:34:08,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:34:08,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3263 transitions. [2023-08-31 01:34:08,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:08,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:08,661 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:08,661 INFO L175 Difference]: Start difference. First operand has 286 places, 878 transitions, 20243 flow. Second operand 13 states and 3263 transitions. [2023-08-31 01:34:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1005 transitions, 23446 flow [2023-08-31 01:34:18,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1005 transitions, 22628 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-31 01:34:18,130 INFO L231 Difference]: Finished difference. Result has 293 places, 881 transitions, 20713 flow [2023-08-31 01:34:18,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19353, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20713, PETRI_PLACES=293, PETRI_TRANSITIONS=881} [2023-08-31 01:34:18,132 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 255 predicate places. [2023-08-31 01:34:18,132 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 881 transitions, 20713 flow [2023-08-31 01:34:18,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:18,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:34:18,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:34:18,141 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 01:34:18,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:34:18,339 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:34:18,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:34:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash -91455062, now seen corresponding path program 7 times [2023-08-31 01:34:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:34:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925698498] [2023-08-31 01:34:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:34:18,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:34:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:34:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:34:18,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:34:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925698498] [2023-08-31 01:34:18,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925698498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:34:18,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203365498] [2023-08-31 01:34:18,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:34:18,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:34:18,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:34:18,510 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 01:34:18,512 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 01:34:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:34:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 01:34:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:34:18,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:34:18,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-08-31 01:34:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:34:19,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:34:19,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:34:19,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:34:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:34:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203365498] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:34:20,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:34:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-08-31 01:34:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848422279] [2023-08-31 01:34:20,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:34:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:34:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:34:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:34:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:34:20,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-08-31 01:34:20,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 881 transitions, 20713 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:20,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:34:20,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-08-31 01:34:20,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:34:30,647 INFO L130 PetriNetUnfolder]: 23785/35596 cut-off events. [2023-08-31 01:34:30,648 INFO L131 PetriNetUnfolder]: For 791573/791573 co-relation queries the response was YES. [2023-08-31 01:34:30,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259730 conditions, 35596 events. 23785/35596 cut-off events. For 791573/791573 co-relation queries the response was YES. Maximal size of possible extension queue 1790. Compared 250623 event pairs, 2579 based on Foata normal form. 4/33598 useless extension candidates. Maximal degree in co-relation 259621. Up to 11880 conditions per place. [2023-08-31 01:34:31,038 INFO L137 encePairwiseOnDemand]: 577/594 looper letters, 493 selfloop transitions, 601 changer transitions 17/1111 dead transitions. [2023-08-31 01:34:31,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1111 transitions, 25815 flow [2023-08-31 01:34:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:34:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:34:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3829 transitions. [2023-08-31 01:34:31,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40288299663299665 [2023-08-31 01:34:31,046 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3829 transitions. [2023-08-31 01:34:31,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3829 transitions. [2023-08-31 01:34:31,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:34:31,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3829 transitions. [2023-08-31 01:34:31,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 239.3125) internal successors, (3829), 16 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:31,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:31,055 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:31,055 INFO L175 Difference]: Start difference. First operand has 293 places, 881 transitions, 20713 flow. Second operand 16 states and 3829 transitions. [2023-08-31 01:34:31,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1111 transitions, 25815 flow [2023-08-31 01:34:42,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1111 transitions, 24699 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-08-31 01:34:42,368 INFO L231 Difference]: Finished difference. Result has 304 places, 910 transitions, 21947 flow [2023-08-31 01:34:42,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19661, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21947, PETRI_PLACES=304, PETRI_TRANSITIONS=910} [2023-08-31 01:34:42,369 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 266 predicate places. [2023-08-31 01:34:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 910 transitions, 21947 flow [2023-08-31 01:34:42,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:42,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:34:42,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:34:42,379 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 01:34:42,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-31 01:34:42,576 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:34:42,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:34:42,577 INFO L85 PathProgramCache]: Analyzing trace with hash -187961245, now seen corresponding path program 4 times [2023-08-31 01:34:42,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:34:42,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11647402] [2023-08-31 01:34:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:34:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:34:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:34:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:34:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:34:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11647402] [2023-08-31 01:34:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11647402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:34:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763057465] [2023-08-31 01:34:42,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:34:42,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:34:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:34:42,999 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 01:34:43,000 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 01:34:43,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:34:43,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:34:43,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 01:34:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:34:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:34:43,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:34:43,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:34:43,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:34:44,644 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 01:34:44,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763057465] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:34:44,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:34:44,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2023-08-31 01:34:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820442839] [2023-08-31 01:34:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:34:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:34:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:34:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:34:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:34:45,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-31 01:34:45,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 910 transitions, 21947 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:45,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:34:45,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-31 01:34:45,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:34:55,749 INFO L130 PetriNetUnfolder]: 23718/35976 cut-off events. [2023-08-31 01:34:55,749 INFO L131 PetriNetUnfolder]: For 906504/906504 co-relation queries the response was YES. [2023-08-31 01:34:56,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256795 conditions, 35976 events. 23718/35976 cut-off events. For 906504/906504 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 260749 event pairs, 5803 based on Foata normal form. 586/34458 useless extension candidates. Maximal degree in co-relation 256682. Up to 11578 conditions per place. [2023-08-31 01:34:56,187 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 567 selfloop transitions, 563 changer transitions 45/1175 dead transitions. [2023-08-31 01:34:56,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1175 transitions, 27825 flow [2023-08-31 01:34:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:34:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:34:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4210 transitions. [2023-08-31 01:34:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169142404436522 [2023-08-31 01:34:56,338 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4210 transitions. [2023-08-31 01:34:56,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4210 transitions. [2023-08-31 01:34:56,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:34:56,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4210 transitions. [2023-08-31 01:34:56,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 247.64705882352942) internal successors, (4210), 17 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:56,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:56,350 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:34:56,350 INFO L175 Difference]: Start difference. First operand has 304 places, 910 transitions, 21947 flow. Second operand 17 states and 4210 transitions. [2023-08-31 01:34:56,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1175 transitions, 27825 flow [2023-08-31 01:35:07,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1175 transitions, 26725 flow, removed 103 selfloop flow, removed 8 redundant places. [2023-08-31 01:35:07,691 INFO L231 Difference]: Finished difference. Result has 320 places, 949 transitions, 23534 flow [2023-08-31 01:35:07,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=20976, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23534, PETRI_PLACES=320, PETRI_TRANSITIONS=949} [2023-08-31 01:35:07,692 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2023-08-31 01:35:07,692 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 949 transitions, 23534 flow [2023-08-31 01:35:07,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:07,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:35:07,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:35:07,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-31 01:35:07,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:35:07,893 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:35:07,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:35:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1982050721, now seen corresponding path program 7 times [2023-08-31 01:35:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:35:07,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506336804] [2023-08-31 01:35:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:35:07,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:35:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:35:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:35:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:35:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506336804] [2023-08-31 01:35:08,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506336804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:35:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142453953] [2023-08-31 01:35:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:35:08,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:35:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:35:08,069 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 01:35:08,074 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 01:35:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:35:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:35:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:35:08,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:35:08,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 101 [2023-08-31 01:35:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:35:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:35:09,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:35:09,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:35:10,990 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 01:35:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142453953] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:35:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:35:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 11] total 28 [2023-08-31 01:35:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354433295] [2023-08-31 01:35:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:35:10,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:35:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:35:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:35:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:35:11,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 594 [2023-08-31 01:35:11,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 949 transitions, 23534 flow. Second operand has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:11,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:35:11,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 594 [2023-08-31 01:35:11,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:35:24,904 INFO L130 PetriNetUnfolder]: 23408/35373 cut-off events. [2023-08-31 01:35:24,904 INFO L131 PetriNetUnfolder]: For 958898/958898 co-relation queries the response was YES. [2023-08-31 01:35:25,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264964 conditions, 35373 events. 23408/35373 cut-off events. For 958898/958898 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 254271 event pairs, 3727 based on Foata normal form. 1/33270 useless extension candidates. Maximal degree in co-relation 264843. Up to 15123 conditions per place. [2023-08-31 01:35:25,353 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 666 selfloop transitions, 441 changer transitions 23/1130 dead transitions. [2023-08-31 01:35:25,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1130 transitions, 27588 flow [2023-08-31 01:35:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:35:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:35:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3856 transitions. [2023-08-31 01:35:25,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057239057239057 [2023-08-31 01:35:25,356 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3856 transitions. [2023-08-31 01:35:25,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3856 transitions. [2023-08-31 01:35:25,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:35:25,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3856 transitions. [2023-08-31 01:35:25,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:25,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:25,363 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:25,363 INFO L175 Difference]: Start difference. First operand has 320 places, 949 transitions, 23534 flow. Second operand 16 states and 3856 transitions. [2023-08-31 01:35:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1130 transitions, 27588 flow [2023-08-31 01:35:40,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1130 transitions, 27046 flow, removed 87 selfloop flow, removed 8 redundant places. [2023-08-31 01:35:40,227 INFO L231 Difference]: Finished difference. Result has 330 places, 960 transitions, 24189 flow [2023-08-31 01:35:40,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23008, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24189, PETRI_PLACES=330, PETRI_TRANSITIONS=960} [2023-08-31 01:35:40,228 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-08-31 01:35:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 960 transitions, 24189 flow [2023-08-31 01:35:40,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:40,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:35:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:35:40,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 01:35:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:35:40,431 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:35:40,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:35:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1622135649, now seen corresponding path program 8 times [2023-08-31 01:35:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:35:40,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607588141] [2023-08-31 01:35:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:35:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:35:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:35:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:35:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:35:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607588141] [2023-08-31 01:35:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607588141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:35:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973968556] [2023-08-31 01:35:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:35:40,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:35:40,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:35:40,597 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 01:35:40,604 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 01:35:40,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:35:40,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:35:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 01:35:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:35:41,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:35:41,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-08-31 01:35:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:35:41,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:35:41,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973968556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:35:41,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:35:41,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:35:41,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626890324] [2023-08-31 01:35:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:35:41,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:35:41,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:35:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:35:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:35:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:35:41,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 960 transitions, 24189 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:41,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:35:41,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:35:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:35:51,687 INFO L130 PetriNetUnfolder]: 23246/35167 cut-off events. [2023-08-31 01:35:51,687 INFO L131 PetriNetUnfolder]: For 947672/947672 co-relation queries the response was YES. [2023-08-31 01:35:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267558 conditions, 35167 events. 23246/35167 cut-off events. For 947672/947672 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 252388 event pairs, 3657 based on Foata normal form. 53/33124 useless extension candidates. Maximal degree in co-relation 267435. Up to 17902 conditions per place. [2023-08-31 01:35:52,318 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 496 selfloop transitions, 598 changer transitions 25/1119 dead transitions. [2023-08-31 01:35:52,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1119 transitions, 27653 flow [2023-08-31 01:35:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:35:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:35:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4484 transitions. [2023-08-31 01:35:52,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41937897493453047 [2023-08-31 01:35:52,321 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4484 transitions. [2023-08-31 01:35:52,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4484 transitions. [2023-08-31 01:35:52,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:35:52,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4484 transitions. [2023-08-31 01:35:52,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 249.11111111111111) internal successors, (4484), 18 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:52,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:52,328 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:35:52,328 INFO L175 Difference]: Start difference. First operand has 330 places, 960 transitions, 24189 flow. Second operand 18 states and 4484 transitions. [2023-08-31 01:35:52,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1119 transitions, 27653 flow [2023-08-31 01:36:05,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1119 transitions, 26995 flow, removed 54 selfloop flow, removed 9 redundant places. [2023-08-31 01:36:05,605 INFO L231 Difference]: Finished difference. Result has 339 places, 960 transitions, 24844 flow [2023-08-31 01:36:05,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23510, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24844, PETRI_PLACES=339, PETRI_TRANSITIONS=960} [2023-08-31 01:36:05,606 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 301 predicate places. [2023-08-31 01:36:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 960 transitions, 24844 flow [2023-08-31 01:36:05,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:05,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:36:05,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:36:05,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-31 01:36:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:36:05,808 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:36:05,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:36:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 857805660, now seen corresponding path program 8 times [2023-08-31 01:36:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:36:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227978118] [2023-08-31 01:36:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:36:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:36:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:36:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:36:06,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:36:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227978118] [2023-08-31 01:36:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227978118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:36:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068894307] [2023-08-31 01:36:06,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:36:06,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:36:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:36:06,014 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 01:36:06,017 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 01:36:06,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:36:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:36:06,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 01:36:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:36:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:36:06,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:36:06,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068894307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:36:06,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:36:06,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 15 [2023-08-31 01:36:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218074714] [2023-08-31 01:36:06,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:36:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:36:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:36:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:36:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:36:06,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:36:06,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 960 transitions, 24844 flow. Second operand has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:06,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:36:06,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:36:06,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:36:16,746 INFO L130 PetriNetUnfolder]: 22363/34077 cut-off events. [2023-08-31 01:36:16,746 INFO L131 PetriNetUnfolder]: For 979654/979654 co-relation queries the response was YES. [2023-08-31 01:36:17,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257250 conditions, 34077 events. 22363/34077 cut-off events. For 979654/979654 co-relation queries the response was YES. Maximal size of possible extension queue 1854. Compared 247425 event pairs, 3725 based on Foata normal form. 316/32313 useless extension candidates. Maximal degree in co-relation 257125. Up to 21107 conditions per place. [2023-08-31 01:36:17,121 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 624 selfloop transitions, 541 changer transitions 26/1191 dead transitions. [2023-08-31 01:36:17,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1191 transitions, 29571 flow [2023-08-31 01:36:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:36:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:36:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4531 transitions. [2023-08-31 01:36:17,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423774784885896 [2023-08-31 01:36:17,124 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4531 transitions. [2023-08-31 01:36:17,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4531 transitions. [2023-08-31 01:36:17,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:36:17,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4531 transitions. [2023-08-31 01:36:17,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 251.72222222222223) internal successors, (4531), 18 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:17,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:17,131 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:17,131 INFO L175 Difference]: Start difference. First operand has 339 places, 960 transitions, 24844 flow. Second operand 18 states and 4531 transitions. [2023-08-31 01:36:17,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1191 transitions, 29571 flow [2023-08-31 01:36:30,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1191 transitions, 28540 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-08-31 01:36:30,693 INFO L231 Difference]: Finished difference. Result has 350 places, 981 transitions, 25652 flow [2023-08-31 01:36:30,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23484, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25652, PETRI_PLACES=350, PETRI_TRANSITIONS=981} [2023-08-31 01:36:30,694 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 312 predicate places. [2023-08-31 01:36:30,694 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 981 transitions, 25652 flow [2023-08-31 01:36:30,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:30,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:36:30,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:36:30,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 01:36:30,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 01:36:30,895 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:36:30,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:36:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1131905989, now seen corresponding path program 5 times [2023-08-31 01:36:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:36:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893775873] [2023-08-31 01:36:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:36:30,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:36:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:36:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:36:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:36:31,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893775873] [2023-08-31 01:36:31,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893775873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:36:31,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928787751] [2023-08-31 01:36:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:36:31,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:36:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:36:31,327 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 01:36:31,331 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 01:36:31,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:36:31,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:36:31,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 01:36:31,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:36:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:36:31,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:36:31,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:36:31,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:36:33,279 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 01:36:33,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928787751] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:36:33,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:36:33,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-08-31 01:36:33,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760937432] [2023-08-31 01:36:33,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:36:33,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:36:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:36:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:36:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:36:34,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-08-31 01:36:34,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 981 transitions, 25652 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:34,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:36:34,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-08-31 01:36:34,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:36:44,739 INFO L130 PetriNetUnfolder]: 22299/33910 cut-off events. [2023-08-31 01:36:44,739 INFO L131 PetriNetUnfolder]: For 1017741/1017741 co-relation queries the response was YES. [2023-08-31 01:36:45,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259913 conditions, 33910 events. 22299/33910 cut-off events. For 1017741/1017741 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 245138 event pairs, 5229 based on Foata normal form. 15/31845 useless extension candidates. Maximal degree in co-relation 259783. Up to 10842 conditions per place. [2023-08-31 01:36:45,144 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 570 selfloop transitions, 554 changer transitions 63/1187 dead transitions. [2023-08-31 01:36:45,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1187 transitions, 30300 flow [2023-08-31 01:36:45,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:36:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:36:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4194 transitions. [2023-08-31 01:36:45,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41532976827094475 [2023-08-31 01:36:45,147 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4194 transitions. [2023-08-31 01:36:45,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4194 transitions. [2023-08-31 01:36:45,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:36:45,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4194 transitions. [2023-08-31 01:36:45,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 246.7058823529412) internal successors, (4194), 17 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:45,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:45,157 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:45,157 INFO L175 Difference]: Start difference. First operand has 350 places, 981 transitions, 25652 flow. Second operand 17 states and 4194 transitions. [2023-08-31 01:36:45,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1187 transitions, 30300 flow [2023-08-31 01:36:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1187 transitions, 29307 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-08-31 01:36:57,736 INFO L231 Difference]: Finished difference. Result has 360 places, 957 transitions, 25119 flow [2023-08-31 01:36:57,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24680, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25119, PETRI_PLACES=360, PETRI_TRANSITIONS=957} [2023-08-31 01:36:57,738 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 322 predicate places. [2023-08-31 01:36:57,738 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 957 transitions, 25119 flow [2023-08-31 01:36:57,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:57,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:36:57,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:36:57,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 01:36:57,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 01:36:57,940 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:36:57,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:36:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1496257113, now seen corresponding path program 6 times [2023-08-31 01:36:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:36:57,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45555891] [2023-08-31 01:36:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:36:57,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:36:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:36:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:36:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:36:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45555891] [2023-08-31 01:36:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45555891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:36:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183255914] [2023-08-31 01:36:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:36:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:36:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:36:58,369 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:36:58,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 01:36:58,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 01:36:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:36:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:36:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:36:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:36:58,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:36:58,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183255914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:36:58,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:36:58,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-31 01:36:58,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337052438] [2023-08-31 01:36:58,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:36:58,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:36:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:36:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:36:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:36:59,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-08-31 01:36:59,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 957 transitions, 25119 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:36:59,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:36:59,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-08-31 01:36:59,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:37:08,471 INFO L130 PetriNetUnfolder]: 22265/33767 cut-off events. [2023-08-31 01:37:08,471 INFO L131 PetriNetUnfolder]: For 1027068/1027068 co-relation queries the response was YES. [2023-08-31 01:37:08,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258412 conditions, 33767 events. 22265/33767 cut-off events. For 1027068/1027068 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 242254 event pairs, 5355 based on Foata normal form. 15/31668 useless extension candidates. Maximal degree in co-relation 258280. Up to 12820 conditions per place. [2023-08-31 01:37:08,887 INFO L137 encePairwiseOnDemand]: 583/594 looper letters, 467 selfloop transitions, 592 changer transitions 30/1089 dead transitions. [2023-08-31 01:37:08,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1089 transitions, 29065 flow [2023-08-31 01:37:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:37:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:37:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2310 transitions. [2023-08-31 01:37:08,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-31 01:37:08,889 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2310 transitions. [2023-08-31 01:37:08,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2310 transitions. [2023-08-31 01:37:08,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:37:08,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2310 transitions. [2023-08-31 01:37:08,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.6666666666667) internal successors, (2310), 9 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:08,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:08,893 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:08,893 INFO L175 Difference]: Start difference. First operand has 360 places, 957 transitions, 25119 flow. Second operand 9 states and 2310 transitions. [2023-08-31 01:37:08,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1089 transitions, 29065 flow [2023-08-31 01:37:21,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1089 transitions, 28460 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-31 01:37:21,596 INFO L231 Difference]: Finished difference. Result has 358 places, 969 transitions, 26430 flow [2023-08-31 01:37:21,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24514, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26430, PETRI_PLACES=358, PETRI_TRANSITIONS=969} [2023-08-31 01:37:21,597 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 320 predicate places. [2023-08-31 01:37:21,597 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 969 transitions, 26430 flow [2023-08-31 01:37:21,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:21,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:37:21,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:37:21,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 01:37:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 01:37:21,798 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:37:21,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:37:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1657957736, now seen corresponding path program 9 times [2023-08-31 01:37:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:37:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460747153] [2023-08-31 01:37:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:37:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:37:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:37:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:37:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:37:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460747153] [2023-08-31 01:37:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460747153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:37:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362536256] [2023-08-31 01:37:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:37:21,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:37:21,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:37:21,969 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:37:21,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 01:37:22,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:37:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:37:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 01:37:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:37:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:37:22,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:37:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362536256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:37:22,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:37:22,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-08-31 01:37:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064468307] [2023-08-31 01:37:22,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:37:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:37:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:37:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:37:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:37:22,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-08-31 01:37:22,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 969 transitions, 26430 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:22,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:37:22,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-08-31 01:37:22,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:37:32,571 INFO L130 PetriNetUnfolder]: 22063/33348 cut-off events. [2023-08-31 01:37:32,571 INFO L131 PetriNetUnfolder]: For 1022972/1022972 co-relation queries the response was YES. [2023-08-31 01:37:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265553 conditions, 33348 events. 22063/33348 cut-off events. For 1022972/1022972 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 237870 event pairs, 3641 based on Foata normal form. 4/31238 useless extension candidates. Maximal degree in co-relation 265420. Up to 20787 conditions per place. [2023-08-31 01:37:33,162 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 620 selfloop transitions, 510 changer transitions 15/1145 dead transitions. [2023-08-31 01:37:33,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1145 transitions, 30506 flow [2023-08-31 01:37:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:37:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:37:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4252 transitions. [2023-08-31 01:37:33,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42107347989700933 [2023-08-31 01:37:33,166 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4252 transitions. [2023-08-31 01:37:33,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4252 transitions. [2023-08-31 01:37:33,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:37:33,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4252 transitions. [2023-08-31 01:37:33,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 250.11764705882354) internal successors, (4252), 17 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:33,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:33,180 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:33,180 INFO L175 Difference]: Start difference. First operand has 358 places, 969 transitions, 26430 flow. Second operand 17 states and 4252 transitions. [2023-08-31 01:37:33,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1145 transitions, 30506 flow [2023-08-31 01:37:47,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1145 transitions, 29330 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-31 01:37:47,876 INFO L231 Difference]: Finished difference. Result has 368 places, 970 transitions, 26325 flow [2023-08-31 01:37:47,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=25278, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26325, PETRI_PLACES=368, PETRI_TRANSITIONS=970} [2023-08-31 01:37:47,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 330 predicate places. [2023-08-31 01:37:47,877 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 970 transitions, 26325 flow [2023-08-31 01:37:47,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:47,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:37:47,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:37:47,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 01:37:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:37:48,078 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:37:48,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:37:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash 485061456, now seen corresponding path program 10 times [2023-08-31 01:37:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:37:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105419564] [2023-08-31 01:37:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:37:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:37:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:37:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:37:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:37:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105419564] [2023-08-31 01:37:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105419564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:37:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162184623] [2023-08-31 01:37:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:37:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:37:48,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:37:48,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:37:48,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 01:37:48,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:37:48,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:37:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 01:37:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:37:48,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:37:48,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-08-31 01:37:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:37:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:37:49,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:37:49,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-08-31 01:37:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:37:50,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162184623] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:37:50,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:37:50,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 11] total 24 [2023-08-31 01:37:50,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410696768] [2023-08-31 01:37:50,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:37:50,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:37:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:37:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:37:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:37:50,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 594 [2023-08-31 01:37:50,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 970 transitions, 26325 flow. Second operand has 8 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:37:50,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:37:50,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 594 [2023-08-31 01:37:50,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:16,846 INFO L130 PetriNetUnfolder]: 48741/73393 cut-off events. [2023-08-31 01:38:16,847 INFO L131 PetriNetUnfolder]: For 2301921/2301921 co-relation queries the response was YES. [2023-08-31 01:38:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570425 conditions, 73393 events. 48741/73393 cut-off events. For 2301921/2301921 co-relation queries the response was YES. Maximal size of possible extension queue 3685. Compared 575758 event pairs, 5734 based on Foata normal form. 5/68840 useless extension candidates. Maximal degree in co-relation 570293. Up to 27290 conditions per place.