./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:15:45,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:15:45,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:15:45,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:15:45,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:15:45,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:15:45,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:15:45,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:15:45,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:15:45,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:15:45,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:15:45,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:15:45,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:15:45,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:15:45,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:15:45,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:15:45,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:15:45,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:15:45,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:15:45,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:15:45,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:15:45,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:15:45,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:15:45,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:15:45,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:15:45,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:15:45,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:15:45,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:15:45,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:15:45,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:15:45,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:15:45,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:15:45,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:15:45,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:15:45,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:15:45,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:15:45,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:15:45,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:15:45,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:15:45,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:15:45,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:15:45,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:15:45,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:15:45,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:15:45,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:15:45,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:15:45,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:15:45,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:15:45,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:15:45,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:15:45,722 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:15:45,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:15:45,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:15:45,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:15:45,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:15:45,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:15:45,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:15:45,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:15:45,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:15:45,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:15:45,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:15:45,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:15:45,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:15:45,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:15:45,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:15:45,726 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:15:45,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:15:45,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:15:45,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:15:45,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:15:45,986 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:15:45,986 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:15:45,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 12:15:46,990 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:15:47,233 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:15:47,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-09-01 12:15:47,238 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1a83b684/851b8c5d91ba4c96b962477617e0e3cc/FLAG5b619963f [2023-09-01 12:15:47,262 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1a83b684/851b8c5d91ba4c96b962477617e0e3cc [2023-09-01 12:15:47,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:15:47,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:15:47,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:15:47,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:15:47,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:15:47,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e35f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47, skipping insertion in model container [2023-09-01 12:15:47,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:15:47,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:15:47,421 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-symm.wvr.c[2848,2861] [2023-09-01 12:15:47,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:15:47,440 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:15:47,467 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-symm.wvr.c[2848,2861] [2023-09-01 12:15:47,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:15:47,483 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:15:47,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47 WrapperNode [2023-09-01 12:15:47,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:15:47,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:15:47,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:15:47,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:15:47,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,523 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 134 [2023-09-01 12:15:47,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:15:47,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:15:47,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:15:47,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:15:47,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,558 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:15:47,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:15:47,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:15:47,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:15:47,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (1/1) ... [2023-09-01 12:15:47,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:15:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:47,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:15:47,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:15:47,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:15:47,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:15:47,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:15:47,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:15:47,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:15:47,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:15:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:15:47,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:15:47,637 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:15:47,699 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:15:47,700 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:15:48,033 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:15:48,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:15:48,040 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 12:15:48,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:48 BoogieIcfgContainer [2023-09-01 12:15:48,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:15:48,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:15:48,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:15:48,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:15:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:15:47" (1/3) ... [2023-09-01 12:15:48,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34776cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:48, skipping insertion in model container [2023-09-01 12:15:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:47" (2/3) ... [2023-09-01 12:15:48,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34776cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:48, skipping insertion in model container [2023-09-01 12:15:48,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:48" (3/3) ... [2023-09-01 12:15:48,047 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-09-01 12:15:48,052 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:15:48,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:15:48,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:15:48,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:15:48,115 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:15:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 213 transitions, 442 flow [2023-09-01 12:15:48,206 INFO L130 PetriNetUnfolder]: 21/211 cut-off events. [2023-09-01 12:15:48,206 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:15:48,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 211 events. 21/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-09-01 12:15:48,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 213 transitions, 442 flow [2023-09-01 12:15:48,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 203 transitions, 418 flow [2023-09-01 12:15:48,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:15:48,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 203 transitions, 418 flow [2023-09-01 12:15:48,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 203 transitions, 418 flow [2023-09-01 12:15:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 203 transitions, 418 flow [2023-09-01 12:15:48,265 INFO L130 PetriNetUnfolder]: 21/203 cut-off events. [2023-09-01 12:15:48,271 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:15:48,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 203 events. 21/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 229 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-09-01 12:15:48,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-09-01 12:15:52,409 INFO L134 LiptonReduction]: Checked pairs total: 3067 [2023-09-01 12:15:52,409 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-09-01 12:15:52,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:15:52,431 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;@5d10f3b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:15:52,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:15:52,436 INFO L130 PetriNetUnfolder]: 7/24 cut-off events. [2023-09-01 12:15:52,436 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:15:52,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:52,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:52,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:52,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -266999657, now seen corresponding path program 1 times [2023-09-01 12:15:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586411403] [2023-09-01 12:15:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:52,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:52,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586411403] [2023-09-01 12:15:52,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586411403] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:52,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:52,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:15:52,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795450228] [2023-09-01 12:15:52,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:52,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:52,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 435 [2023-09-01 12:15:52,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:52,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 435 [2023-09-01 12:15:52,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:53,069 INFO L130 PetriNetUnfolder]: 112/192 cut-off events. [2023-09-01 12:15:53,069 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 12:15:53,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 556 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2023-09-01 12:15:53,072 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2023-09-01 12:15:53,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2023-09-01 12:15:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 775 transitions. [2023-09-01 12:15:53,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454022988505747 [2023-09-01 12:15:53,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 775 transitions. [2023-09-01 12:15:53,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 775 transitions. [2023-09-01 12:15:53,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:53,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 775 transitions. [2023-09-01 12:15:53,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,109 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 775 transitions. [2023-09-01 12:15:53,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2023-09-01 12:15:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:15:53,113 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2023-09-01 12:15:53,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-09-01 12:15:53,116 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-09-01 12:15:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2023-09-01 12:15:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:53,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:15:53,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:53,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 541242839, now seen corresponding path program 2 times [2023-09-01 12:15:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122699069] [2023-09-01 12:15:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:53,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122699069] [2023-09-01 12:15:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122699069] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:53,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:53,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:15:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362954288] [2023-09-01 12:15:53,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:53,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 435 [2023-09-01 12:15:53,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:53,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 435 [2023-09-01 12:15:53,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:53,406 INFO L130 PetriNetUnfolder]: 119/215 cut-off events. [2023-09-01 12:15:53,407 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-09-01 12:15:53,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2023-09-01 12:15:53,408 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-09-01 12:15:53,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2023-09-01 12:15:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-09-01 12:15:53,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442528735632184 [2023-09-01 12:15:53,410 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-09-01 12:15:53,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-09-01 12:15:53,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:53,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-09-01 12:15:53,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,415 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 773 transitions. [2023-09-01 12:15:53,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2023-09-01 12:15:53,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:53,417 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2023-09-01 12:15:53,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-09-01 12:15:53,417 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-09-01 12:15:53,418 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2023-09-01 12:15:53,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:53,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:15:53,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:53,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash -682121893, now seen corresponding path program 1 times [2023-09-01 12:15:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:53,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370772197] [2023-09-01 12:15:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:53,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:53,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370772197] [2023-09-01 12:15:53,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370772197] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:53,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:53,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:15:53,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674612919] [2023-09-01 12:15:53,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:53,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:15:53,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:15:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:15:53,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 435 [2023-09-01 12:15:53,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:53,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 435 [2023-09-01 12:15:53,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:53,494 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-09-01 12:15:53,495 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-09-01 12:15:53,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2023-09-01 12:15:53,496 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-09-01 12:15:53,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2023-09-01 12:15:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:15:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:15:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-09-01 12:15:53,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46053639846743294 [2023-09-01 12:15:53,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-09-01 12:15:53,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-09-01 12:15:53,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:53,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-09-01 12:15:53,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,502 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 601 transitions. [2023-09-01 12:15:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2023-09-01 12:15:53,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:53,503 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2023-09-01 12:15:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-09-01 12:15:53,504 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-09-01 12:15:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2023-09-01 12:15:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:53,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:53,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:15:53,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:53,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1884163200, now seen corresponding path program 1 times [2023-09-01 12:15:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632127715] [2023-09-01 12:15:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:53,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632127715] [2023-09-01 12:15:53,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632127715] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:53,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:53,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:53,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972951304] [2023-09-01 12:15:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:53,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:54,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:15:54,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:54,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:15:54,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:54,452 INFO L130 PetriNetUnfolder]: 268/494 cut-off events. [2023-09-01 12:15:54,452 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-09-01 12:15:54,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 494 events. 268/494 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2010 event pairs, 43 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 395. Up to 100 conditions per place. [2023-09-01 12:15:54,459 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 111 selfloop transitions, 25 changer transitions 22/158 dead transitions. [2023-09-01 12:15:54,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 158 transitions, 747 flow [2023-09-01 12:15:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:15:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:15:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3218 transitions. [2023-09-01 12:15:54,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41098339719029375 [2023-09-01 12:15:54,466 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3218 transitions. [2023-09-01 12:15:54,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3218 transitions. [2023-09-01 12:15:54,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:54,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3218 transitions. [2023-09-01 12:15:54,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.77777777777777) internal successors, (3218), 18 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,483 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,483 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 18 states and 3218 transitions. [2023-09-01 12:15:54,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 158 transitions, 747 flow [2023-09-01 12:15:54,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 158 transitions, 707 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:54,486 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 252 flow [2023-09-01 12:15:54,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-09-01 12:15:54,487 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-09-01 12:15:54,487 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 252 flow [2023-09-01 12:15:54,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:54,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:54,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:15:54,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:54,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 839378742, now seen corresponding path program 2 times [2023-09-01 12:15:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:54,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900787017] [2023-09-01 12:15:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:54,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900787017] [2023-09-01 12:15:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900787017] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:54,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:54,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396131693] [2023-09-01 12:15:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:55,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:15:55,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 252 flow. Second operand has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:55,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:15:55,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:55,564 INFO L130 PetriNetUnfolder]: 274/499 cut-off events. [2023-09-01 12:15:55,565 INFO L131 PetriNetUnfolder]: For 1057/1057 co-relation queries the response was YES. [2023-09-01 12:15:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 499 events. 274/499 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1987 event pairs, 51 based on Foata normal form. 13/485 useless extension candidates. Maximal degree in co-relation 1650. Up to 209 conditions per place. [2023-09-01 12:15:55,567 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 72 selfloop transitions, 23 changer transitions 10/105 dead transitions. [2023-09-01 12:15:55,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 676 flow [2023-09-01 12:15:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:15:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:15:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1963 transitions. [2023-09-01 12:15:55,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102403343782654 [2023-09-01 12:15:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1963 transitions. [2023-09-01 12:15:55,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1963 transitions. [2023-09-01 12:15:55,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:55,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1963 transitions. [2023-09-01 12:15:55,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.45454545454547) internal successors, (1963), 11 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,580 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,580 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 252 flow. Second operand 11 states and 1963 transitions. [2023-09-01 12:15:55,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 676 flow [2023-09-01 12:15:55,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 105 transitions, 630 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-09-01 12:15:55,584 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 361 flow [2023-09-01 12:15:55,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=361, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-09-01 12:15:55,585 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-09-01 12:15:55,585 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 361 flow [2023-09-01 12:15:55,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:55,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:55,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:15:55,586 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:55,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1337186352, now seen corresponding path program 3 times [2023-09-01 12:15:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693552763] [2023-09-01 12:15:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:55,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693552763] [2023-09-01 12:15:55,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693552763] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:55,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:55,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:55,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26518037] [2023-09-01 12:15:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:55,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:56,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 435 [2023-09-01 12:15:56,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 361 flow. Second operand has 9 states, 9 states have (on average 169.66666666666666) internal successors, (1527), 9 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:56,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 435 [2023-09-01 12:15:56,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:56,504 INFO L130 PetriNetUnfolder]: 302/562 cut-off events. [2023-09-01 12:15:56,505 INFO L131 PetriNetUnfolder]: For 1148/1148 co-relation queries the response was YES. [2023-09-01 12:15:56,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2046 conditions, 562 events. 302/562 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2407 event pairs, 31 based on Foata normal form. 14/543 useless extension candidates. Maximal degree in co-relation 1828. Up to 99 conditions per place. [2023-09-01 12:15:56,508 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 136 selfloop transitions, 33 changer transitions 14/183 dead transitions. [2023-09-01 12:15:56,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 183 transitions, 1160 flow [2023-09-01 12:15:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:15:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:15:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3375 transitions. [2023-09-01 12:15:56,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40834845735027225 [2023-09-01 12:15:56,514 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3375 transitions. [2023-09-01 12:15:56,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3375 transitions. [2023-09-01 12:15:56,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:56,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3375 transitions. [2023-09-01 12:15:56,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 177.6315789473684) internal successors, (3375), 19 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 435.0) internal successors, (8700), 20 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,528 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 435.0) internal successors, (8700), 20 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,528 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 361 flow. Second operand 19 states and 3375 transitions. [2023-09-01 12:15:56,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 183 transitions, 1160 flow [2023-09-01 12:15:56,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 183 transitions, 998 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-09-01 12:15:56,534 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 403 flow [2023-09-01 12:15:56,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=403, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-09-01 12:15:56,534 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-09-01 12:15:56,534 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 403 flow [2023-09-01 12:15:56,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.66666666666666) internal successors, (1527), 9 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:56,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:56,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:15:56,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:56,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1557044638, now seen corresponding path program 4 times [2023-09-01 12:15:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:56,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907603584] [2023-09-01 12:15:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907603584] [2023-09-01 12:15:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907603584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:56,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981452385] [2023-09-01 12:15:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:57,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:15:57,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 403 flow. Second operand has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:57,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:15:57,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:57,385 INFO L130 PetriNetUnfolder]: 281/536 cut-off events. [2023-09-01 12:15:57,386 INFO L131 PetriNetUnfolder]: For 1062/1062 co-relation queries the response was YES. [2023-09-01 12:15:57,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 536 events. 281/536 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2320 event pairs, 68 based on Foata normal form. 19/522 useless extension candidates. Maximal degree in co-relation 1867. Up to 257 conditions per place. [2023-09-01 12:15:57,388 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 73 selfloop transitions, 26 changer transitions 9/108 dead transitions. [2023-09-01 12:15:57,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 760 flow [2023-09-01 12:15:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:15:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:15:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1960 transitions. [2023-09-01 12:15:57,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096133751306165 [2023-09-01 12:15:57,392 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1960 transitions. [2023-09-01 12:15:57,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1960 transitions. [2023-09-01 12:15:57,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:57,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1960 transitions. [2023-09-01 12:15:57,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.1818181818182) internal successors, (1960), 11 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,401 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,401 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 403 flow. Second operand 11 states and 1960 transitions. [2023-09-01 12:15:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 760 flow [2023-09-01 12:15:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 694 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-09-01 12:15:57,404 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 448 flow [2023-09-01 12:15:57,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=448, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2023-09-01 12:15:57,405 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 52 predicate places. [2023-09-01 12:15:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 448 flow [2023-09-01 12:15:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.66666666666666) internal successors, (1545), 9 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:15:57,407 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:57,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1332429184, now seen corresponding path program 5 times [2023-09-01 12:15:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747813949] [2023-09-01 12:15:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:57,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:57,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747813949] [2023-09-01 12:15:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747813949] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:57,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:57,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365319623] [2023-09-01 12:15:57,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 435 [2023-09-01 12:15:58,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:58,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 435 [2023-09-01 12:15:58,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:58,501 INFO L130 PetriNetUnfolder]: 270/536 cut-off events. [2023-09-01 12:15:58,501 INFO L131 PetriNetUnfolder]: For 1618/1618 co-relation queries the response was YES. [2023-09-01 12:15:58,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 536 events. 270/536 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2466 event pairs, 49 based on Foata normal form. 20/519 useless extension candidates. Maximal degree in co-relation 1863. Up to 143 conditions per place. [2023-09-01 12:15:58,504 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 103 selfloop transitions, 34 changer transitions 7/144 dead transitions. [2023-09-01 12:15:58,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 996 flow [2023-09-01 12:15:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:15:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:15:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2708 transitions. [2023-09-01 12:15:58,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150191570881226 [2023-09-01 12:15:58,509 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2708 transitions. [2023-09-01 12:15:58,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2708 transitions. [2023-09-01 12:15:58,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:58,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2708 transitions. [2023-09-01 12:15:58,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.53333333333333) internal successors, (2708), 15 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,520 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,520 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 448 flow. Second operand 15 states and 2708 transitions. [2023-09-01 12:15:58,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 996 flow [2023-09-01 12:15:58,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 144 transitions, 906 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-09-01 12:15:58,529 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 530 flow [2023-09-01 12:15:58,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=530, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-09-01 12:15:58,531 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2023-09-01 12:15:58,531 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 530 flow [2023-09-01 12:15:58,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:58,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:58,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:15:58,532 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:58,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 481879698, now seen corresponding path program 6 times [2023-09-01 12:15:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419190890] [2023-09-01 12:15:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:58,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419190890] [2023-09-01 12:15:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419190890] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:58,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:58,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33431507] [2023-09-01 12:15:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:59,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 435 [2023-09-01 12:15:59,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:59,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 435 [2023-09-01 12:15:59,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:59,880 INFO L130 PetriNetUnfolder]: 264/518 cut-off events. [2023-09-01 12:15:59,881 INFO L131 PetriNetUnfolder]: For 1242/1242 co-relation queries the response was YES. [2023-09-01 12:15:59,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 518 events. 264/518 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2306 event pairs, 51 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 1938. Up to 87 conditions per place. [2023-09-01 12:15:59,883 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 134 selfloop transitions, 36 changer transitions 10/180 dead transitions. [2023-09-01 12:15:59,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1173 flow [2023-09-01 12:15:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:15:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:15:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3615 transitions. [2023-09-01 12:15:59,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41551724137931034 [2023-09-01 12:15:59,890 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3615 transitions. [2023-09-01 12:15:59,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3615 transitions. [2023-09-01 12:15:59,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:59,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3615 transitions. [2023-09-01 12:15:59,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 180.75) internal successors, (3615), 20 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 435.0) internal successors, (9135), 21 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,903 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 435.0) internal successors, (9135), 21 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,903 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 530 flow. Second operand 20 states and 3615 transitions. [2023-09-01 12:15:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1173 flow [2023-09-01 12:15:59,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 180 transitions, 1095 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-09-01 12:15:59,909 INFO L231 Difference]: Finished difference. Result has 97 places, 69 transitions, 539 flow [2023-09-01 12:15:59,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=539, PETRI_PLACES=97, PETRI_TRANSITIONS=69} [2023-09-01 12:15:59,909 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2023-09-01 12:15:59,909 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 69 transitions, 539 flow [2023-09-01 12:15:59,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.66666666666666) internal successors, (1563), 9 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:59,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:59,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:15:59,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:59,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1377073745, now seen corresponding path program 1 times [2023-09-01 12:15:59,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:59,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826718763] [2023-09-01 12:15:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:00,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:00,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826718763] [2023-09-01 12:16:00,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826718763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:00,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366702343] [2023-09-01 12:16:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:00,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:00,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:00,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:00,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:16:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:16:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:00,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:00,525 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 112 treesize of output 77 [2023-09-01 12:16:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:00,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:00,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:00,700 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 [2023-09-01 12:16:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:01,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366702343] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:01,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:01,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 12:16:01,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568011652] [2023-09-01 12:16:01,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:01,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:16:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:01,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:16:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:16:02,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:16:02,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 69 transitions, 539 flow. Second operand has 26 states, 26 states have (on average 163.84615384615384) internal successors, (4260), 26 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:02,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:02,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:16:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:04,233 INFO L130 PetriNetUnfolder]: 636/1206 cut-off events. [2023-09-01 12:16:04,233 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2023-09-01 12:16:04,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1206 events. 636/1206 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6509 event pairs, 117 based on Foata normal form. 30/1156 useless extension candidates. Maximal degree in co-relation 4475. Up to 223 conditions per place. [2023-09-01 12:16:04,241 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 200 selfloop transitions, 74 changer transitions 15/289 dead transitions. [2023-09-01 12:16:04,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 289 transitions, 2139 flow [2023-09-01 12:16:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 12:16:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 12:16:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5593 transitions. [2023-09-01 12:16:04,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38962034134447926 [2023-09-01 12:16:04,268 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5593 transitions. [2023-09-01 12:16:04,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5593 transitions. [2023-09-01 12:16:04,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:04,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5593 transitions. [2023-09-01 12:16:04,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 169.4848484848485) internal successors, (5593), 33 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:04,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:04,290 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:04,290 INFO L175 Difference]: Start difference. First operand has 97 places, 69 transitions, 539 flow. Second operand 33 states and 5593 transitions. [2023-09-01 12:16:04,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 289 transitions, 2139 flow [2023-09-01 12:16:04,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 289 transitions, 1973 flow, removed 21 selfloop flow, removed 18 redundant places. [2023-09-01 12:16:04,301 INFO L231 Difference]: Finished difference. Result has 122 places, 113 transitions, 985 flow [2023-09-01 12:16:04,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=985, PETRI_PLACES=122, PETRI_TRANSITIONS=113} [2023-09-01 12:16:04,302 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 97 predicate places. [2023-09-01 12:16:04,302 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 113 transitions, 985 flow [2023-09-01 12:16:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 163.84615384615384) internal successors, (4260), 26 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:04,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:04,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:04,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:04,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 12:16:04,509 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:04,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1571800870, now seen corresponding path program 1 times [2023-09-01 12:16:04,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:04,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034185848] [2023-09-01 12:16:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:04,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:04,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034185848] [2023-09-01 12:16:04,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034185848] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:04,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927013028] [2023-09-01 12:16:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:04,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:04,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:16:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 12:16:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:05,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:05,058 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 112 treesize of output 77 [2023-09-01 12:16:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:05,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:05,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:05,202 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 [2023-09-01 12:16:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:05,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927013028] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:05,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-09-01 12:16:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092620922] [2023-09-01 12:16:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:16:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:16:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:16:05,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:16:05,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 113 transitions, 985 flow. Second operand has 9 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:05,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:05,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:16:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:06,652 INFO L130 PetriNetUnfolder]: 628/1178 cut-off events. [2023-09-01 12:16:06,652 INFO L131 PetriNetUnfolder]: For 5762/5762 co-relation queries the response was YES. [2023-09-01 12:16:06,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 1178 events. 628/1178 cut-off events. For 5762/5762 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6225 event pairs, 117 based on Foata normal form. 2/1101 useless extension candidates. Maximal degree in co-relation 4988. Up to 313 conditions per place. [2023-09-01 12:16:06,658 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 100 selfloop transitions, 60 changer transitions 10/170 dead transitions. [2023-09-01 12:16:06,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 170 transitions, 1511 flow [2023-09-01 12:16:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:16:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:16:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2370 transitions. [2023-09-01 12:16:06,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-09-01 12:16:06,661 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2370 transitions. [2023-09-01 12:16:06,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2370 transitions. [2023-09-01 12:16:06,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:06,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2370 transitions. [2023-09-01 12:16:06,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 169.28571428571428) internal successors, (2370), 14 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:06,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:06,668 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:06,668 INFO L175 Difference]: Start difference. First operand has 122 places, 113 transitions, 985 flow. Second operand 14 states and 2370 transitions. [2023-09-01 12:16:06,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 170 transitions, 1511 flow [2023-09-01 12:16:06,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1355 flow, removed 57 selfloop flow, removed 14 redundant places. [2023-09-01 12:16:06,684 INFO L231 Difference]: Finished difference. Result has 120 places, 112 transitions, 957 flow [2023-09-01 12:16:06,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=957, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2023-09-01 12:16:06,684 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2023-09-01 12:16:06,684 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 957 flow [2023-09-01 12:16:06,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:06,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:06,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:06,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 12:16:06,889 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,SelfDestructingSolverStorable10 [2023-09-01 12:16:06,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:06,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash -525334967, now seen corresponding path program 2 times [2023-09-01 12:16:06,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617478745] [2023-09-01 12:16:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:07,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:07,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617478745] [2023-09-01 12:16:07,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617478745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:07,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034216092] [2023-09-01 12:16:07,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:07,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:07,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:07,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:16:07,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:16:07,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:07,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 12:16:07,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:07,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:07,320 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 112 treesize of output 77 [2023-09-01 12:16:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:07,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:07,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034216092] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-09-01 12:16:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659979898] [2023-09-01 12:16:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:16:07,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:16:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:16:07,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:16:07,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 957 flow. Second operand has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:07,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:07,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:16:07,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:07,708 INFO L130 PetriNetUnfolder]: 620/1151 cut-off events. [2023-09-01 12:16:07,708 INFO L131 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2023-09-01 12:16:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 1151 events. 620/1151 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5934 event pairs, 129 based on Foata normal form. 1/1074 useless extension candidates. Maximal degree in co-relation 4803. Up to 563 conditions per place. [2023-09-01 12:16:07,715 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 84 selfloop transitions, 55 changer transitions 11/150 dead transitions. [2023-09-01 12:16:07,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 150 transitions, 1437 flow [2023-09-01 12:16:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:16:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:16:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1605 transitions. [2023-09-01 12:16:07,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2023-09-01 12:16:07,717 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1605 transitions. [2023-09-01 12:16:07,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1605 transitions. [2023-09-01 12:16:07,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:07,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1605 transitions. [2023-09-01 12:16:07,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.33333333333334) internal successors, (1605), 9 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:07,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:07,721 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:07,721 INFO L175 Difference]: Start difference. First operand has 120 places, 112 transitions, 957 flow. Second operand 9 states and 1605 transitions. [2023-09-01 12:16:07,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 150 transitions, 1437 flow [2023-09-01 12:16:07,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1359 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 12:16:07,735 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 998 flow [2023-09-01 12:16:07,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2023-09-01 12:16:07,735 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-09-01 12:16:07,736 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 998 flow [2023-09-01 12:16:07,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:07,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:07,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:07,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 12:16:07,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:07,941 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:07,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:07,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2145988610, now seen corresponding path program 2 times [2023-09-01 12:16:07,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154149946] [2023-09-01 12:16:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154149946] [2023-09-01 12:16:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154149946] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773130064] [2023-09-01 12:16:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:08,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:08,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:16:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:16:08,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 12:16:08,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:08,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:08,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773130064] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:08,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:08,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-09-01 12:16:08,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773845433] [2023-09-01 12:16:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:08,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:16:08,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:16:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:16:08,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 435 [2023-09-01 12:16:08,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 998 flow. Second operand has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:08,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 435 [2023-09-01 12:16:08,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:08,769 INFO L130 PetriNetUnfolder]: 614/1134 cut-off events. [2023-09-01 12:16:08,769 INFO L131 PetriNetUnfolder]: For 4984/4984 co-relation queries the response was YES. [2023-09-01 12:16:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 1134 events. 614/1134 cut-off events. For 4984/4984 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5819 event pairs, 142 based on Foata normal form. 2/1058 useless extension candidates. Maximal degree in co-relation 4838. Up to 559 conditions per place. [2023-09-01 12:16:08,776 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 110 selfloop transitions, 46 changer transitions 9/165 dead transitions. [2023-09-01 12:16:08,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 165 transitions, 1474 flow [2023-09-01 12:16:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:16:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:16:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1995 transitions. [2023-09-01 12:16:08,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2023-09-01 12:16:08,778 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1995 transitions. [2023-09-01 12:16:08,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1995 transitions. [2023-09-01 12:16:08,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:08,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1995 transitions. [2023-09-01 12:16:08,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 181.36363636363637) internal successors, (1995), 11 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,783 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,783 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 998 flow. Second operand 11 states and 1995 transitions. [2023-09-01 12:16:08,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 165 transitions, 1474 flow [2023-09-01 12:16:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 165 transitions, 1357 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-09-01 12:16:08,798 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 960 flow [2023-09-01 12:16:08,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=960, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2023-09-01 12:16:08,799 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 94 predicate places. [2023-09-01 12:16:08,799 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 960 flow [2023-09-01 12:16:08,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:08,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:08,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:09,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:09,005 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:09,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1204862359, now seen corresponding path program 3 times [2023-09-01 12:16:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:09,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117720112] [2023-09-01 12:16:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:09,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117720112] [2023-09-01 12:16:09,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117720112] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733081742] [2023-09-01 12:16:09,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:16:09,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:09,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:09,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:09,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:16:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:16:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 12:16:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:09,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:09,419 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 108 treesize of output 73 [2023-09-01 12:16:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:09,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733081742] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:09,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:09,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-09-01 12:16:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307684400] [2023-09-01 12:16:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:16:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:16:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:16:09,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:16:09,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:09,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:09,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:16:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:09,815 INFO L130 PetriNetUnfolder]: 606/1107 cut-off events. [2023-09-01 12:16:09,815 INFO L131 PetriNetUnfolder]: For 4463/4463 co-relation queries the response was YES. [2023-09-01 12:16:09,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1107 events. 606/1107 cut-off events. For 4463/4463 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5523 event pairs, 109 based on Foata normal form. 1/1030 useless extension candidates. Maximal degree in co-relation 4667. Up to 504 conditions per place. [2023-09-01 12:16:09,821 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 84 selfloop transitions, 57 changer transitions 5/146 dead transitions. [2023-09-01 12:16:09,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 146 transitions, 1397 flow [2023-09-01 12:16:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:16:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:16:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1607 transitions. [2023-09-01 12:16:09,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104725415070243 [2023-09-01 12:16:09,824 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1607 transitions. [2023-09-01 12:16:09,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1607 transitions. [2023-09-01 12:16:09,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:09,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1607 transitions. [2023-09-01 12:16:09,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.55555555555554) internal successors, (1607), 9 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:09,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:09,827 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:09,827 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 960 flow. Second operand 9 states and 1607 transitions. [2023-09-01 12:16:09,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 146 transitions, 1397 flow [2023-09-01 12:16:09,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1268 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-09-01 12:16:09,841 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 942 flow [2023-09-01 12:16:09,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=942, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2023-09-01 12:16:09,841 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 88 predicate places. [2023-09-01 12:16:09,841 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 942 flow [2023-09-01 12:16:09,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:09,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:09,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:09,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:16:10,047 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,SelfDestructingSolverStorable13 [2023-09-01 12:16:10,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:10,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -410144759, now seen corresponding path program 4 times [2023-09-01 12:16:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:10,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943522086] [2023-09-01 12:16:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:10,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943522086] [2023-09-01 12:16:10,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943522086] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:10,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536006725] [2023-09-01 12:16:10,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:16:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:10,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:10,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:16:10,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:16:10,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 12:16:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:10,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:10,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:10,612 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 [2023-09-01 12:16:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536006725] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:11,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:11,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-09-01 12:16:11,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777958679] [2023-09-01 12:16:11,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:11,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:16:11,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:16:11,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:11,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:11,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:16:11,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:12,095 INFO L130 PetriNetUnfolder]: 576/1077 cut-off events. [2023-09-01 12:16:12,095 INFO L131 PetriNetUnfolder]: For 4379/4379 co-relation queries the response was YES. [2023-09-01 12:16:12,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4424 conditions, 1077 events. 576/1077 cut-off events. For 4379/4379 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5475 event pairs, 140 based on Foata normal form. 29/1028 useless extension candidates. Maximal degree in co-relation 4372. Up to 316 conditions per place. [2023-09-01 12:16:12,101 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 100 selfloop transitions, 62 changer transitions 9/171 dead transitions. [2023-09-01 12:16:12,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1536 flow [2023-09-01 12:16:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:16:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:16:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2212 transitions. [2023-09-01 12:16:12,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39115826702033596 [2023-09-01 12:16:12,103 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2212 transitions. [2023-09-01 12:16:12,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2212 transitions. [2023-09-01 12:16:12,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:12,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2212 transitions. [2023-09-01 12:16:12,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.15384615384616) internal successors, (2212), 13 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:12,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:12,108 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:12,108 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 942 flow. Second operand 13 states and 2212 transitions. [2023-09-01 12:16:12,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1536 flow [2023-09-01 12:16:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1406 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-09-01 12:16:12,119 INFO L231 Difference]: Finished difference. Result has 123 places, 110 transitions, 1060 flow [2023-09-01 12:16:12,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1060, PETRI_PLACES=123, PETRI_TRANSITIONS=110} [2023-09-01 12:16:12,120 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 98 predicate places. [2023-09-01 12:16:12,120 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 110 transitions, 1060 flow [2023-09-01 12:16:12,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:12,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:12,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:12,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 12:16:12,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:16:12,326 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:12,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 938212337, now seen corresponding path program 5 times [2023-09-01 12:16:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041756423] [2023-09-01 12:16:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041756423] [2023-09-01 12:16:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041756423] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225130321] [2023-09-01 12:16:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:16:12,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:12,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:16:12,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:12,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:12,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:16:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:12,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:12,754 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 108 treesize of output 73 [2023-09-01 12:16:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:12,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:12,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:12,998 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 [2023-09-01 12:16:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:13,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225130321] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:13,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:13,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 12:16:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019827424] [2023-09-01 12:16:13,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:13,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:16:13,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:16:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:16:14,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:16:14,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 110 transitions, 1060 flow. Second operand has 26 states, 26 states have (on average 164.84615384615384) internal successors, (4286), 26 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:14,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:14,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:16:14,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:15,450 INFO L130 PetriNetUnfolder]: 592/1122 cut-off events. [2023-09-01 12:16:15,451 INFO L131 PetriNetUnfolder]: For 5303/5303 co-relation queries the response was YES. [2023-09-01 12:16:15,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 1122 events. 592/1122 cut-off events. For 5303/5303 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5913 event pairs, 140 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 4725. Up to 186 conditions per place. [2023-09-01 12:16:15,457 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 187 selfloop transitions, 73 changer transitions 10/270 dead transitions. [2023-09-01 12:16:15,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 270 transitions, 2253 flow [2023-09-01 12:16:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 12:16:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 12:16:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5435 transitions. [2023-09-01 12:16:15,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39044540229885055 [2023-09-01 12:16:15,461 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5435 transitions. [2023-09-01 12:16:15,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5435 transitions. [2023-09-01 12:16:15,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:15,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5435 transitions. [2023-09-01 12:16:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 169.84375) internal successors, (5435), 32 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:15,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:15,473 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:15,473 INFO L175 Difference]: Start difference. First operand has 123 places, 110 transitions, 1060 flow. Second operand 32 states and 5435 transitions. [2023-09-01 12:16:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 270 transitions, 2253 flow [2023-09-01 12:16:15,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 270 transitions, 2079 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-09-01 12:16:15,492 INFO L231 Difference]: Finished difference. Result has 147 places, 118 transitions, 1214 flow [2023-09-01 12:16:15,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1214, PETRI_PLACES=147, PETRI_TRANSITIONS=118} [2023-09-01 12:16:15,492 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 122 predicate places. [2023-09-01 12:16:15,492 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 118 transitions, 1214 flow [2023-09-01 12:16:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 164.84615384615384) internal successors, (4286), 26 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:15,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:15,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:15,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:15,698 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:15,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 87662851, now seen corresponding path program 6 times [2023-09-01 12:16:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921951438] [2023-09-01 12:16:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:15,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921951438] [2023-09-01 12:16:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921951438] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647159811] [2023-09-01 12:16:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:16:15,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:15,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:15,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:15,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:16:15,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:16:15,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 12:16:15,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:16,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:16,099 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 108 treesize of output 73 [2023-09-01 12:16:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:16,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:16,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647159811] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:16,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:16,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-09-01 12:16:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638544207] [2023-09-01 12:16:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:16:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:16:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:16:16,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 435 [2023-09-01 12:16:16,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 118 transitions, 1214 flow. Second operand has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:16,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 435 [2023-09-01 12:16:16,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:16,538 INFO L130 PetriNetUnfolder]: 590/1109 cut-off events. [2023-09-01 12:16:16,538 INFO L131 PetriNetUnfolder]: For 3839/3839 co-relation queries the response was YES. [2023-09-01 12:16:16,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 1109 events. 590/1109 cut-off events. For 3839/3839 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5774 event pairs, 140 based on Foata normal form. 1/1024 useless extension candidates. Maximal degree in co-relation 4645. Up to 512 conditions per place. [2023-09-01 12:16:16,549 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 90 selfloop transitions, 58 changer transitions 6/154 dead transitions. [2023-09-01 12:16:16,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1623 flow [2023-09-01 12:16:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:16:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:16:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1606 transitions. [2023-09-01 12:16:16,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021711366538954 [2023-09-01 12:16:16,552 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1606 transitions. [2023-09-01 12:16:16,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1606 transitions. [2023-09-01 12:16:16,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:16,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1606 transitions. [2023-09-01 12:16:16,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.44444444444446) internal successors, (1606), 9 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,555 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,556 INFO L175 Difference]: Start difference. First operand has 147 places, 118 transitions, 1214 flow. Second operand 9 states and 1606 transitions. [2023-09-01 12:16:16,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1623 flow [2023-09-01 12:16:16,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 154 transitions, 1508 flow, removed 11 selfloop flow, removed 22 redundant places. [2023-09-01 12:16:16,571 INFO L231 Difference]: Finished difference. Result has 132 places, 116 transitions, 1196 flow [2023-09-01 12:16:16,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1196, PETRI_PLACES=132, PETRI_TRANSITIONS=116} [2023-09-01 12:16:16,572 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 107 predicate places. [2023-09-01 12:16:16,572 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 116 transitions, 1196 flow [2023-09-01 12:16:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 171.77777777777777) internal successors, (1546), 9 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:16,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:16,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:16,777 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,SelfDestructingSolverStorable16 [2023-09-01 12:16:16,777 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:16,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash -74845507, now seen corresponding path program 1 times [2023-09-01 12:16:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840635476] [2023-09-01 12:16:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840635476] [2023-09-01 12:16:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840635476] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724958081] [2023-09-01 12:16:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:16,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:16,874 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) [2023-09-01 12:16:16,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:16:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:16:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:17,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724958081] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:17,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:17,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-09-01 12:16:17,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218979152] [2023-09-01 12:16:17,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:16:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:16:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:16:17,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 435 [2023-09-01 12:16:17,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 116 transitions, 1196 flow. Second operand has 7 states, 7 states have (on average 179.42857142857142) internal successors, (1256), 7 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:17,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 435 [2023-09-01 12:16:17,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:17,419 INFO L130 PetriNetUnfolder]: 627/1189 cut-off events. [2023-09-01 12:16:17,419 INFO L131 PetriNetUnfolder]: For 5251/5251 co-relation queries the response was YES. [2023-09-01 12:16:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1189 events. 627/1189 cut-off events. For 5251/5251 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6405 event pairs, 106 based on Foata normal form. 16/1119 useless extension candidates. Maximal degree in co-relation 5109. Up to 357 conditions per place. [2023-09-01 12:16:17,425 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 156 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2023-09-01 12:16:17,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 175 transitions, 1918 flow [2023-09-01 12:16:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1853 transitions. [2023-09-01 12:16:17,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259770114942529 [2023-09-01 12:16:17,428 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1853 transitions. [2023-09-01 12:16:17,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1853 transitions. [2023-09-01 12:16:17,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:17,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1853 transitions. [2023-09-01 12:16:17,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.3) internal successors, (1853), 10 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,432 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,432 INFO L175 Difference]: Start difference. First operand has 132 places, 116 transitions, 1196 flow. Second operand 10 states and 1853 transitions. [2023-09-01 12:16:17,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 175 transitions, 1918 flow [2023-09-01 12:16:17,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1752 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-09-01 12:16:17,444 INFO L231 Difference]: Finished difference. Result has 130 places, 121 transitions, 1127 flow [2023-09-01 12:16:17,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1127, PETRI_PLACES=130, PETRI_TRANSITIONS=121} [2023-09-01 12:16:17,444 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2023-09-01 12:16:17,444 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 121 transitions, 1127 flow [2023-09-01 12:16:17,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.42857142857142) internal successors, (1256), 7 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:17,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:17,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:17,650 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,SelfDestructingSolverStorable17 [2023-09-01 12:16:17,650 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:17,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -116190729, now seen corresponding path program 1 times [2023-09-01 12:16:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:17,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118439241] [2023-09-01 12:16:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118439241] [2023-09-01 12:16:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118439241] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:17,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:16:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:16:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494625194] [2023-09-01 12:16:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:17,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:16:17,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:16:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:16:17,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 435 [2023-09-01 12:16:17,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 121 transitions, 1127 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:17,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 435 [2023-09-01 12:16:17,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:17,888 INFO L130 PetriNetUnfolder]: 402/790 cut-off events. [2023-09-01 12:16:17,888 INFO L131 PetriNetUnfolder]: For 3590/3590 co-relation queries the response was YES. [2023-09-01 12:16:17,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 790 events. 402/790 cut-off events. For 3590/3590 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3725 event pairs, 237 based on Foata normal form. 42/832 useless extension candidates. Maximal degree in co-relation 3399. Up to 687 conditions per place. [2023-09-01 12:16:17,892 INFO L137 encePairwiseOnDemand]: 430/435 looper letters, 74 selfloop transitions, 2 changer transitions 33/109 dead transitions. [2023-09-01 12:16:17,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 109 transitions, 1176 flow [2023-09-01 12:16:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:16:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:16:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 960 transitions. [2023-09-01 12:16:17,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413793103448276 [2023-09-01 12:16:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 960 transitions. [2023-09-01 12:16:17,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 960 transitions. [2023-09-01 12:16:17,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:17,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 960 transitions. [2023-09-01 12:16:17,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,896 INFO L175 Difference]: Start difference. First operand has 130 places, 121 transitions, 1127 flow. Second operand 5 states and 960 transitions. [2023-09-01 12:16:17,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 109 transitions, 1176 flow [2023-09-01 12:16:17,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 109 transitions, 1097 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-09-01 12:16:17,905 INFO L231 Difference]: Finished difference. Result has 117 places, 76 transitions, 649 flow [2023-09-01 12:16:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=117, PETRI_TRANSITIONS=76} [2023-09-01 12:16:17,906 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-09-01 12:16:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 76 transitions, 649 flow [2023-09-01 12:16:17,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:17,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:17,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 12:16:17,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:17,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1934131672, now seen corresponding path program 1 times [2023-09-01 12:16:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:17,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752648195] [2023-09-01 12:16:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752648195] [2023-09-01 12:16:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752648195] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:17,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:16:17,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:16:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944757771] [2023-09-01 12:16:17,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:17,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:16:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:16:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:16:18,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 435 [2023-09-01 12:16:18,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 76 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:18,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:18,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 435 [2023-09-01 12:16:18,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:18,108 INFO L130 PetriNetUnfolder]: 226/442 cut-off events. [2023-09-01 12:16:18,109 INFO L131 PetriNetUnfolder]: For 1807/1807 co-relation queries the response was YES. [2023-09-01 12:16:18,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 442 events. 226/442 cut-off events. For 1807/1807 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1699 event pairs, 126 based on Foata normal form. 28/470 useless extension candidates. Maximal degree in co-relation 1978. Up to 375 conditions per place. [2023-09-01 12:16:18,110 INFO L137 encePairwiseOnDemand]: 430/435 looper letters, 38 selfloop transitions, 4 changer transitions 25/67 dead transitions. [2023-09-01 12:16:18,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 67 transitions, 627 flow [2023-09-01 12:16:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:16:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:16:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 958 transitions. [2023-09-01 12:16:18,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44045977011494253 [2023-09-01 12:16:18,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 958 transitions. [2023-09-01 12:16:18,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 958 transitions. [2023-09-01 12:16:18,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:18,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 958 transitions. [2023-09-01 12:16:18,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 191.6) internal successors, (958), 5 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:18,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:18,114 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:18,114 INFO L175 Difference]: Start difference. First operand has 117 places, 76 transitions, 649 flow. Second operand 5 states and 958 transitions. [2023-09-01 12:16:18,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 67 transitions, 627 flow [2023-09-01 12:16:18,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 574 flow, removed 9 selfloop flow, removed 15 redundant places. [2023-09-01 12:16:18,118 INFO L231 Difference]: Finished difference. Result has 79 places, 42 transitions, 243 flow [2023-09-01 12:16:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=79, PETRI_TRANSITIONS=42} [2023-09-01 12:16:18,119 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-09-01 12:16:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 42 transitions, 243 flow [2023-09-01 12:16:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 12:16:18,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:18,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash 331731570, now seen corresponding path program 1 times [2023-09-01 12:16:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650133875] [2023-09-01 12:16:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650133875] [2023-09-01 12:16:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650133875] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556693700] [2023-09-01 12:16:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:18,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:18,377 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) [2023-09-01 12:16:18,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:16:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 12:16:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:18,478 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-09-01 12:16:18,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2023-09-01 12:16:18,553 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 12:16:18,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 12:16:18,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:18,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:18,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:18,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:18,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:18,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-09-01 12:16:18,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:18,949 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 598 treesize of output 546 [2023-09-01 12:16:18,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:18,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-09-01 12:16:18,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:18,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-09-01 12:16:19,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:19,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-09-01 12:16:19,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:19,038 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 294 treesize of output 274 [2023-09-01 12:16:19,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:19,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-09-01 12:16:19,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:19,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 223 [2023-09-01 12:16:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556693700] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:19,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:19,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-09-01 12:16:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663048245] [2023-09-01 12:16:19,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:19,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:16:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:16:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=500, Unknown=10, NotChecked=0, Total=650 [2023-09-01 12:16:20,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 435 [2023-09-01 12:16:20,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 42 transitions, 243 flow. Second operand has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:20,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:20,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 435 [2023-09-01 12:16:20,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:21,203 INFO L130 PetriNetUnfolder]: 528/940 cut-off events. [2023-09-01 12:16:21,203 INFO L131 PetriNetUnfolder]: For 1669/1669 co-relation queries the response was YES. [2023-09-01 12:16:21,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 940 events. 528/940 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4373 event pairs, 68 based on Foata normal form. 32/971 useless extension candidates. Maximal degree in co-relation 3483. Up to 313 conditions per place. [2023-09-01 12:16:21,207 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 83 selfloop transitions, 20 changer transitions 0/103 dead transitions. [2023-09-01 12:16:21,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 799 flow [2023-09-01 12:16:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:16:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:16:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1406 transitions. [2023-09-01 12:16:21,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29383490073145246 [2023-09-01 12:16:21,212 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1406 transitions. [2023-09-01 12:16:21,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1406 transitions. [2023-09-01 12:16:21,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:21,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1406 transitions. [2023-09-01 12:16:21,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 127.81818181818181) internal successors, (1406), 11 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:21,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:21,216 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:21,216 INFO L175 Difference]: Start difference. First operand has 79 places, 42 transitions, 243 flow. Second operand 11 states and 1406 transitions. [2023-09-01 12:16:21,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 799 flow [2023-09-01 12:16:21,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 745 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-09-01 12:16:21,221 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 320 flow [2023-09-01 12:16:21,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=320, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-09-01 12:16:21,221 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2023-09-01 12:16:21,221 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 320 flow [2023-09-01 12:16:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:21,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:21,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:21,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:21,427 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,SelfDestructingSolverStorable20 [2023-09-01 12:16:21,427 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:21,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1880584320, now seen corresponding path program 2 times [2023-09-01 12:16:21,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:21,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326925364] [2023-09-01 12:16:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:21,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:21,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326925364] [2023-09-01 12:16:21,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326925364] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:21,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481082934] [2023-09-01 12:16:21,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:21,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:21,744 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) [2023-09-01 12:16:21,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:16:21,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:21,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:22,083 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:22,083 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 20 treesize of output 4 [2023-09-01 12:16:22,089 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:22,089 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 20 treesize of output 4 [2023-09-01 12:16:22,124 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:16:22,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:16:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:22,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481082934] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:22,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:22,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-09-01 12:16:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125656829] [2023-09-01 12:16:22,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:16:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:16:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:16:23,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:16:23,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 320 flow. Second operand has 22 states, 22 states have (on average 163.77272727272728) internal successors, (3603), 22 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:23,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:16:23,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:23,640 INFO L130 PetriNetUnfolder]: 692/1244 cut-off events. [2023-09-01 12:16:23,640 INFO L131 PetriNetUnfolder]: For 2585/2585 co-relation queries the response was YES. [2023-09-01 12:16:23,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4949 conditions, 1244 events. 692/1244 cut-off events. For 2585/2585 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6170 event pairs, 204 based on Foata normal form. 32/1276 useless extension candidates. Maximal degree in co-relation 2463. Up to 725 conditions per place. [2023-09-01 12:16:23,645 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 83 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2023-09-01 12:16:23,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 879 flow [2023-09-01 12:16:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:16:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:16:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1852 transitions. [2023-09-01 12:16:23,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38704284221525603 [2023-09-01 12:16:23,646 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1852 transitions. [2023-09-01 12:16:23,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1852 transitions. [2023-09-01 12:16:23,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:23,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1852 transitions. [2023-09-01 12:16:23,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.36363636363637) internal successors, (1852), 11 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,651 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,651 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 320 flow. Second operand 11 states and 1852 transitions. [2023-09-01 12:16:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 879 flow [2023-09-01 12:16:23,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 840 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-09-01 12:16:23,654 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 427 flow [2023-09-01 12:16:23,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=427, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-09-01 12:16:23,655 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 45 predicate places. [2023-09-01 12:16:23,655 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 427 flow [2023-09-01 12:16:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 163.77272727272728) internal successors, (3603), 22 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:23,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:23,860 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,SelfDestructingSolverStorable21 [2023-09-01 12:16:23,861 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:23,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1839051542, now seen corresponding path program 3 times [2023-09-01 12:16:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:23,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944107764] [2023-09-01 12:16:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944107764] [2023-09-01 12:16:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944107764] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666942479] [2023-09-01 12:16:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:16:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:24,177 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) [2023-09-01 12:16:24,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:16:24,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:16:24,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:24,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:24,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:24,454 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:24,455 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 20 treesize of output 4 [2023-09-01 12:16:24,485 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 12:16:24,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 12:16:24,501 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:24,501 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 12 treesize of output 4 [2023-09-01 12:16:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:24,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666942479] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:24,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:24,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2023-09-01 12:16:24,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812029636] [2023-09-01 12:16:24,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:24,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:24,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:24,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:16:24,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:16:24,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 427 flow. Second operand has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:24,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:24,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:16:24,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:25,268 INFO L130 PetriNetUnfolder]: 748/1372 cut-off events. [2023-09-01 12:16:25,268 INFO L131 PetriNetUnfolder]: For 3839/3839 co-relation queries the response was YES. [2023-09-01 12:16:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5835 conditions, 1372 events. 748/1372 cut-off events. For 3839/3839 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7142 event pairs, 252 based on Foata normal form. 32/1404 useless extension candidates. Maximal degree in co-relation 4176. Up to 858 conditions per place. [2023-09-01 12:16:25,272 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 78 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2023-09-01 12:16:25,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 913 flow [2023-09-01 12:16:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1706 transitions. [2023-09-01 12:16:25,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.392183908045977 [2023-09-01 12:16:25,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1706 transitions. [2023-09-01 12:16:25,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1706 transitions. [2023-09-01 12:16:25,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:25,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1706 transitions. [2023-09-01 12:16:25,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.6) internal successors, (1706), 10 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,298 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,298 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 427 flow. Second operand 10 states and 1706 transitions. [2023-09-01 12:16:25,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 913 flow [2023-09-01 12:16:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 892 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-09-01 12:16:25,318 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 511 flow [2023-09-01 12:16:25,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2023-09-01 12:16:25,319 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 52 predicate places. [2023-09-01 12:16:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 511 flow [2023-09-01 12:16:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:25,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:25,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 12:16:25,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:25,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2036209612, now seen corresponding path program 4 times [2023-09-01 12:16:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551534550] [2023-09-01 12:16:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551534550] [2023-09-01 12:16:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551534550] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293831693] [2023-09-01 12:16:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:16:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:25,821 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) [2023-09-01 12:16:25,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:16:25,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:16:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:16:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:25,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:25,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:26,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:16:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293831693] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:26,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:26,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2023-09-01 12:16:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105655813] [2023-09-01 12:16:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:16:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:16:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:16:26,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 435 [2023-09-01 12:16:26,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 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) [2023-09-01 12:16:26,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:26,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 435 [2023-09-01 12:16:26,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:26,721 INFO L130 PetriNetUnfolder]: 1052/1922 cut-off events. [2023-09-01 12:16:26,721 INFO L131 PetriNetUnfolder]: For 6595/6595 co-relation queries the response was YES. [2023-09-01 12:16:26,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9012 conditions, 1922 events. 1052/1922 cut-off events. For 6595/6595 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10958 event pairs, 306 based on Foata normal form. 4/1926 useless extension candidates. Maximal degree in co-relation 6616. Up to 1383 conditions per place. [2023-09-01 12:16:26,729 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 102 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2023-09-01 12:16:26,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 126 transitions, 1279 flow [2023-09-01 12:16:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:16:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:16:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1486 transitions. [2023-09-01 12:16:26,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42701149425287355 [2023-09-01 12:16:26,731 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1486 transitions. [2023-09-01 12:16:26,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1486 transitions. [2023-09-01 12:16:26,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:26,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1486 transitions. [2023-09-01 12:16:26,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:26,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:26,734 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:26,734 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 511 flow. Second operand 8 states and 1486 transitions. [2023-09-01 12:16:26,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 126 transitions, 1279 flow [2023-09-01 12:16:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 126 transitions, 1203 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-09-01 12:16:26,743 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 770 flow [2023-09-01 12:16:26,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-09-01 12:16:26,743 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2023-09-01 12:16:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 770 flow [2023-09-01 12:16:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 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) [2023-09-01 12:16:26,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:26,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:26,949 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,SelfDestructingSolverStorable23 [2023-09-01 12:16:26,949 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:26,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash 705047868, now seen corresponding path program 5 times [2023-09-01 12:16:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:26,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600091560] [2023-09-01 12:16:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600091560] [2023-09-01 12:16:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600091560] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379371578] [2023-09-01 12:16:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:16:27,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:27,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:27,257 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) [2023-09-01 12:16:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:16:27,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:16:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:27,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:16:27,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379371578] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:27,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:27,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2023-09-01 12:16:27,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687833011] [2023-09-01 12:16:27,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:27,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:16:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:27,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:16:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:16:27,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 435 [2023-09-01 12:16:27,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 770 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:27,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:27,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 435 [2023-09-01 12:16:27,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:28,369 INFO L130 PetriNetUnfolder]: 1072/1976 cut-off events. [2023-09-01 12:16:28,369 INFO L131 PetriNetUnfolder]: For 8169/8169 co-relation queries the response was YES. [2023-09-01 12:16:28,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9626 conditions, 1976 events. 1072/1976 cut-off events. For 8169/8169 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11554 event pairs, 294 based on Foata normal form. 4/1980 useless extension candidates. Maximal degree in co-relation 9168. Up to 1291 conditions per place. [2023-09-01 12:16:28,379 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 113 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2023-09-01 12:16:28,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1439 flow [2023-09-01 12:16:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:16:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:16:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1303 transitions. [2023-09-01 12:16:28,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791461412151066 [2023-09-01 12:16:28,381 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1303 transitions. [2023-09-01 12:16:28,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1303 transitions. [2023-09-01 12:16:28,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:28,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1303 transitions. [2023-09-01 12:16:28,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:28,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:28,384 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:28,384 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 770 flow. Second operand 7 states and 1303 transitions. [2023-09-01 12:16:28,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1439 flow [2023-09-01 12:16:28,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1417 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-09-01 12:16:28,399 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 996 flow [2023-09-01 12:16:28,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=996, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2023-09-01 12:16:28,400 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 69 predicate places. [2023-09-01 12:16:28,400 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 996 flow [2023-09-01 12:16:28,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:28,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:28,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:28,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:28,605 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:28,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1236215570, now seen corresponding path program 6 times [2023-09-01 12:16:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:28,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879132626] [2023-09-01 12:16:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879132626] [2023-09-01 12:16:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879132626] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721219319] [2023-09-01 12:16:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:16:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:28,902 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) [2023-09-01 12:16:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:16:29,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:16:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:29,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:29,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:29,227 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:29,228 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 20 treesize of output 4 [2023-09-01 12:16:29,233 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:29,234 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 20 treesize of output 4 [2023-09-01 12:16:29,271 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:16:29,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:16:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721219319] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:29,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:29,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-09-01 12:16:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102365828] [2023-09-01 12:16:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:16:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:16:29,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 996 flow. Second operand has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:29,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:29,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:16:29,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:30,097 INFO L130 PetriNetUnfolder]: 1066/1958 cut-off events. [2023-09-01 12:16:30,097 INFO L131 PetriNetUnfolder]: For 11089/11089 co-relation queries the response was YES. [2023-09-01 12:16:30,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10122 conditions, 1958 events. 1066/1958 cut-off events. For 11089/11089 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11312 event pairs, 342 based on Foata normal form. 8/1966 useless extension candidates. Maximal degree in co-relation 9922. Up to 1220 conditions per place. [2023-09-01 12:16:30,108 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 89 selfloop transitions, 39 changer transitions 0/128 dead transitions. [2023-09-01 12:16:30,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 1553 flow [2023-09-01 12:16:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1700 transitions. [2023-09-01 12:16:30,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2023-09-01 12:16:30,134 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1700 transitions. [2023-09-01 12:16:30,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1700 transitions. [2023-09-01 12:16:30,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:30,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1700 transitions. [2023-09-01 12:16:30,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.0) internal successors, (1700), 10 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:30,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:30,138 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:30,138 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 996 flow. Second operand 10 states and 1700 transitions. [2023-09-01 12:16:30,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 1553 flow [2023-09-01 12:16:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1511 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-09-01 12:16:30,160 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 1152 flow [2023-09-01 12:16:30,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1152, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2023-09-01 12:16:30,161 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 79 predicate places. [2023-09-01 12:16:30,161 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 1152 flow [2023-09-01 12:16:30,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:30,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:30,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:30,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 12:16:30,365 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:30,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2051793062, now seen corresponding path program 7 times [2023-09-01 12:16:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231921506] [2023-09-01 12:16:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231921506] [2023-09-01 12:16:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231921506] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262582946] [2023-09-01 12:16:30,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:16:30,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:30,640 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) [2023-09-01 12:16:30,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:16:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 12:16:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:30,745 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-09-01 12:16:30,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2023-09-01 12:16:30,807 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 12:16:30,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 12:16:30,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:30,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:30,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:30,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:31,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-09-01 12:16:31,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,227 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 598 treesize of output 546 [2023-09-01 12:16:31,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-09-01 12:16:31,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-09-01 12:16:31,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2023-09-01 12:16:31,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,322 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 598 treesize of output 546 [2023-09-01 12:16:31,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-09-01 12:16:31,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:31,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-09-01 12:16:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:31,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262582946] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:31,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-09-01 12:16:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52485316] [2023-09-01 12:16:31,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:16:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:16:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=499, Unknown=14, NotChecked=0, Total=650 [2023-09-01 12:16:32,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 435 [2023-09-01 12:16:32,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 1152 flow. Second operand has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:32,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:32,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 435 [2023-09-01 12:16:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:33,138 INFO L130 PetriNetUnfolder]: 1322/2466 cut-off events. [2023-09-01 12:16:33,138 INFO L131 PetriNetUnfolder]: For 15698/15698 co-relation queries the response was YES. [2023-09-01 12:16:33,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12874 conditions, 2466 events. 1322/2466 cut-off events. For 15698/15698 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15274 event pairs, 322 based on Foata normal form. 44/2510 useless extension candidates. Maximal degree in co-relation 12648. Up to 1367 conditions per place. [2023-09-01 12:16:33,151 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 121 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2023-09-01 12:16:33,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 158 transitions, 2001 flow [2023-09-01 12:16:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:16:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:16:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1398 transitions. [2023-09-01 12:16:33,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2921630094043887 [2023-09-01 12:16:33,153 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1398 transitions. [2023-09-01 12:16:33,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1398 transitions. [2023-09-01 12:16:33,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:33,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1398 transitions. [2023-09-01 12:16:33,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 127.0909090909091) internal successors, (1398), 11 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,157 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,157 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 1152 flow. Second operand 11 states and 1398 transitions. [2023-09-01 12:16:33,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 158 transitions, 2001 flow [2023-09-01 12:16:33,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 158 transitions, 1899 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-09-01 12:16:33,183 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 1294 flow [2023-09-01 12:16:33,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1294, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2023-09-01 12:16:33,184 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2023-09-01 12:16:33,184 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 1294 flow [2023-09-01 12:16:33,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:33,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:33,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:33,390 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,SelfDestructingSolverStorable26 [2023-09-01 12:16:33,390 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:33,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 428376716, now seen corresponding path program 8 times [2023-09-01 12:16:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:33,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511346177] [2023-09-01 12:16:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:33,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:33,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511346177] [2023-09-01 12:16:33,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511346177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:33,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965765502] [2023-09-01 12:16:33,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:33,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:33,661 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) [2023-09-01 12:16:33,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:16:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:33,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:33,996 INFO L321 Elim1Store]: treesize reduction 11, result has 84.1 percent of original size [2023-09-01 12:16:33,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 72 [2023-09-01 12:16:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:34,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965765502] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:34,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:34,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-09-01 12:16:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566526746] [2023-09-01 12:16:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:16:34,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 435 [2023-09-01 12:16:34,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 1294 flow. Second operand has 10 states, 10 states have (on average 166.9) internal successors, (1669), 10 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:34,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:34,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 435 [2023-09-01 12:16:34,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:34,728 INFO L130 PetriNetUnfolder]: 1328/2500 cut-off events. [2023-09-01 12:16:34,729 INFO L131 PetriNetUnfolder]: For 17987/17987 co-relation queries the response was YES. [2023-09-01 12:16:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13945 conditions, 2500 events. 1328/2500 cut-off events. For 17987/17987 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15550 event pairs, 318 based on Foata normal form. 4/2504 useless extension candidates. Maximal degree in co-relation 13884. Up to 1372 conditions per place. [2023-09-01 12:16:34,741 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 110 selfloop transitions, 44 changer transitions 0/154 dead transitions. [2023-09-01 12:16:34,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 154 transitions, 1997 flow [2023-09-01 12:16:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1710 transitions. [2023-09-01 12:16:34,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2023-09-01 12:16:34,743 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1710 transitions. [2023-09-01 12:16:34,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1710 transitions. [2023-09-01 12:16:34,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:34,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1710 transitions. [2023-09-01 12:16:34,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:34,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:34,746 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:34,747 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 1294 flow. Second operand 10 states and 1710 transitions. [2023-09-01 12:16:34,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 154 transitions, 1997 flow [2023-09-01 12:16:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 154 transitions, 1956 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-09-01 12:16:34,777 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 1495 flow [2023-09-01 12:16:34,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1495, PETRI_PLACES=117, PETRI_TRANSITIONS=113} [2023-09-01 12:16:34,781 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-09-01 12:16:34,781 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 1495 flow [2023-09-01 12:16:34,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.9) internal successors, (1669), 10 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:34,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:34,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:34,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 12:16:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:16:34,987 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:34,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2137221722, now seen corresponding path program 9 times [2023-09-01 12:16:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508679702] [2023-09-01 12:16:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:34,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:35,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508679702] [2023-09-01 12:16:35,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508679702] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570309966] [2023-09-01 12:16:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:16:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:35,250 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) [2023-09-01 12:16:35,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:16:35,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:16:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:35,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:35,578 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:35,578 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 20 treesize of output 4 [2023-09-01 12:16:35,582 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:35,582 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 20 treesize of output 4 [2023-09-01 12:16:35,615 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:16:35,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:16:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570309966] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:35,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:35,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-09-01 12:16:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494648452] [2023-09-01 12:16:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:16:36,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:16:36,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 1495 flow. Second operand has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:36,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:36,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:16:36,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:36,496 INFO L130 PetriNetUnfolder]: 1330/2506 cut-off events. [2023-09-01 12:16:36,496 INFO L131 PetriNetUnfolder]: For 20995/20995 co-relation queries the response was YES. [2023-09-01 12:16:36,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14992 conditions, 2506 events. 1330/2506 cut-off events. For 20995/20995 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15768 event pairs, 326 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 14815. Up to 1372 conditions per place. [2023-09-01 12:16:36,512 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 107 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2023-09-01 12:16:36,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 2083 flow [2023-09-01 12:16:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1697 transitions. [2023-09-01 12:16:36,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39011494252873563 [2023-09-01 12:16:36,514 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1697 transitions. [2023-09-01 12:16:36,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1697 transitions. [2023-09-01 12:16:36,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:36,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1697 transitions. [2023-09-01 12:16:36,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.7) internal successors, (1697), 10 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:36,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:36,518 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:36,518 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 1495 flow. Second operand 10 states and 1697 transitions. [2023-09-01 12:16:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 2083 flow [2023-09-01 12:16:36,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 146 transitions, 2024 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-09-01 12:16:36,557 INFO L231 Difference]: Finished difference. Result has 122 places, 116 transitions, 1599 flow [2023-09-01 12:16:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1599, PETRI_PLACES=122, PETRI_TRANSITIONS=116} [2023-09-01 12:16:36,558 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 97 predicate places. [2023-09-01 12:16:36,558 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 116 transitions, 1599 flow [2023-09-01 12:16:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:36,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:36,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:16:36,763 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:36,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -905893090, now seen corresponding path program 10 times [2023-09-01 12:16:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627521870] [2023-09-01 12:16:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:37,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627521870] [2023-09-01 12:16:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627521870] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296441686] [2023-09-01 12:16:37,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:16:37,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:37,017 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) [2023-09-01 12:16:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:16:37,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:16:37,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:16:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:37,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:37,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:37,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:37,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:16:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296441686] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:37,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:37,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2023-09-01 12:16:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247900643] [2023-09-01 12:16:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:16:37,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:16:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:16:37,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 435 [2023-09-01 12:16:37,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 116 transitions, 1599 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:37,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:37,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 435 [2023-09-01 12:16:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:38,156 INFO L130 PetriNetUnfolder]: 1310/2430 cut-off events. [2023-09-01 12:16:38,156 INFO L131 PetriNetUnfolder]: For 20891/20891 co-relation queries the response was YES. [2023-09-01 12:16:38,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14625 conditions, 2430 events. 1310/2430 cut-off events. For 20891/20891 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14939 event pairs, 286 based on Foata normal form. 4/2434 useless extension candidates. Maximal degree in co-relation 14447. Up to 1141 conditions per place. [2023-09-01 12:16:38,170 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 127 selfloop transitions, 51 changer transitions 0/178 dead transitions. [2023-09-01 12:16:38,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 178 transitions, 2435 flow [2023-09-01 12:16:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:16:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:16:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1486 transitions. [2023-09-01 12:16:38,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42701149425287355 [2023-09-01 12:16:38,172 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1486 transitions. [2023-09-01 12:16:38,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1486 transitions. [2023-09-01 12:16:38,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:38,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1486 transitions. [2023-09-01 12:16:38,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:38,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:38,175 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:38,176 INFO L175 Difference]: Start difference. First operand has 122 places, 116 transitions, 1599 flow. Second operand 8 states and 1486 transitions. [2023-09-01 12:16:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 178 transitions, 2435 flow [2023-09-01 12:16:38,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 178 transitions, 2297 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-09-01 12:16:38,218 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 1881 flow [2023-09-01 12:16:38,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1881, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2023-09-01 12:16:38,218 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2023-09-01 12:16:38,219 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 1881 flow [2023-09-01 12:16:38,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:38,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:38,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:38,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 12:16:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:38,424 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:38,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 593308546, now seen corresponding path program 11 times [2023-09-01 12:16:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260008739] [2023-09-01 12:16:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:38,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260008739] [2023-09-01 12:16:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260008739] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271864121] [2023-09-01 12:16:38,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:16:38,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:38,865 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) [2023-09-01 12:16:38,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:16:38,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 12:16:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:39,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:39,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:16:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:16:39,190 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:16:39,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-09-01 12:16:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:39,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 54 [2023-09-01 12:16:39,448 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:39,448 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 636 treesize of output 556 [2023-09-01 12:16:39,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:39,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 222 [2023-09-01 12:16:39,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:39,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 252 [2023-09-01 12:16:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:39,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271864121] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:39,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:39,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-09-01 12:16:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70172045] [2023-09-01 12:16:39,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:16:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:16:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=743, Unknown=7, NotChecked=0, Total=870 [2023-09-01 12:16:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 435 [2023-09-01 12:16:41,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 1881 flow. Second operand has 30 states, 30 states have (on average 120.56666666666666) internal successors, (3617), 30 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:41,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:41,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 435 [2023-09-01 12:16:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:42,480 INFO L130 PetriNetUnfolder]: 1892/3436 cut-off events. [2023-09-01 12:16:42,480 INFO L131 PetriNetUnfolder]: For 31766/31766 co-relation queries the response was YES. [2023-09-01 12:16:42,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20094 conditions, 3436 events. 1892/3436 cut-off events. For 31766/31766 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21791 event pairs, 246 based on Foata normal form. 64/3500 useless extension candidates. Maximal degree in co-relation 19913. Up to 1332 conditions per place. [2023-09-01 12:16:42,499 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 159 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-09-01 12:16:42,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 228 transitions, 3434 flow [2023-09-01 12:16:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:16:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:16:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1518 transitions. [2023-09-01 12:16:42,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2908045977011494 [2023-09-01 12:16:42,502 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1518 transitions. [2023-09-01 12:16:42,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1518 transitions. [2023-09-01 12:16:42,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:42,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1518 transitions. [2023-09-01 12:16:42,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.5) internal successors, (1518), 12 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:42,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:42,506 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:42,506 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 1881 flow. Second operand 12 states and 1518 transitions. [2023-09-01 12:16:42,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 228 transitions, 3434 flow [2023-09-01 12:16:42,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 228 transitions, 3368 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-09-01 12:16:42,560 INFO L231 Difference]: Finished difference. Result has 139 places, 151 transitions, 2320 flow [2023-09-01 12:16:42,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2320, PETRI_PLACES=139, PETRI_TRANSITIONS=151} [2023-09-01 12:16:42,561 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 114 predicate places. [2023-09-01 12:16:42,561 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 151 transitions, 2320 flow [2023-09-01 12:16:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 120.56666666666666) internal successors, (3617), 30 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:42,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:42,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:42,767 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,SelfDestructingSolverStorable30 [2023-09-01 12:16:42,767 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:42,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash -473871770, now seen corresponding path program 12 times [2023-09-01 12:16:42,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:42,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202415516] [2023-09-01 12:16:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:42,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202415516] [2023-09-01 12:16:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202415516] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124162537] [2023-09-01 12:16:43,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:16:43,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:43,082 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) [2023-09-01 12:16:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:16:43,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:16:43,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:16:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:16:43,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:16:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:43,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:43,516 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (let ((.cse3 (forall ((~get2~0.base Int) (v_ArrVal_970 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_970) ~get2~0.base) .cse2) |c_thread1Thread1of1ForFork0_#t~mem2|))))) (and (forall ((~get2~0.base Int) (v_ArrVal_970 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_970))) (let ((.cse0 (select .cse1 ~get2~0.base))) (or (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset)) (not (= (select .cse0 .cse2) |c_thread1Thread1of1ForFork0_#t~mem2|)))))) (or (< 0 c_~n2~0) .cse3) (or (< 0 c_~n1~0) .cse3)))) is different from false [2023-09-01 12:16:43,551 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-09-01 12:16:43,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-09-01 12:16:43,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:43,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-09-01 12:16:43,748 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:43,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-09-01 12:16:43,754 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:43,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-09-01 12:16:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124162537] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:43,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:43,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 28 [2023-09-01 12:16:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643022303] [2023-09-01 12:16:43,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:16:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:16:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2023-09-01 12:16:43,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 435 [2023-09-01 12:16:43,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 151 transitions, 2320 flow. Second operand has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:43,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:43,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 435 [2023-09-01 12:16:43,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:48,930 INFO L130 PetriNetUnfolder]: 1938/3452 cut-off events. [2023-09-01 12:16:48,931 INFO L131 PetriNetUnfolder]: For 41071/41071 co-relation queries the response was YES. [2023-09-01 12:16:48,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22600 conditions, 3452 events. 1938/3452 cut-off events. For 41071/41071 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21236 event pairs, 736 based on Foata normal form. 8/3460 useless extension candidates. Maximal degree in co-relation 22526. Up to 2463 conditions per place. [2023-09-01 12:16:48,953 INFO L137 encePairwiseOnDemand]: 420/435 looper letters, 121 selfloop transitions, 89 changer transitions 0/210 dead transitions. [2023-09-01 12:16:48,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 210 transitions, 3678 flow [2023-09-01 12:16:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:16:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:16:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1585 transitions. [2023-09-01 12:16:48,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.303639846743295 [2023-09-01 12:16:48,956 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1585 transitions. [2023-09-01 12:16:48,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1585 transitions. [2023-09-01 12:16:48,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:48,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1585 transitions. [2023-09-01 12:16:48,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 132.08333333333334) internal successors, (1585), 12 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:48,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:48,960 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:48,960 INFO L175 Difference]: Start difference. First operand has 139 places, 151 transitions, 2320 flow. Second operand 12 states and 1585 transitions. [2023-09-01 12:16:48,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 210 transitions, 3678 flow [2023-09-01 12:16:49,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 210 transitions, 3591 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-09-01 12:16:49,051 INFO L231 Difference]: Finished difference. Result has 147 places, 187 transitions, 3229 flow [2023-09-01 12:16:49,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3229, PETRI_PLACES=147, PETRI_TRANSITIONS=187} [2023-09-01 12:16:49,052 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 122 predicate places. [2023-09-01 12:16:49,052 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 187 transitions, 3229 flow [2023-09-01 12:16:49,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:49,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:49,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:49,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 12:16:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:49,257 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:49,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1418947498, now seen corresponding path program 13 times [2023-09-01 12:16:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828739519] [2023-09-01 12:16:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828739519] [2023-09-01 12:16:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828739519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778881583] [2023-09-01 12:16:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:16:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:49,601 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) [2023-09-01 12:16:49,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 12:16:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 12:16:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:49,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:16:49,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:16:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:16:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:16:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:50,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:50,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 57 [2023-09-01 12:16:50,377 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:16:50,378 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 712 treesize of output 624 [2023-09-01 12:16:50,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 336 [2023-09-01 12:16:50,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 308 [2023-09-01 12:16:50,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-09-01 12:16:50,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,610 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 302 treesize of output 266 [2023-09-01 12:16:50,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-09-01 12:16:50,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 111 [2023-09-01 12:16:50,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-09-01 12:16:50,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,704 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 302 treesize of output 266 [2023-09-01 12:16:50,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:50,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 119 [2023-09-01 12:16:50,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-09-01 12:16:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:50,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778881583] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:50,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:50,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-09-01 12:16:50,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231627227] [2023-09-01 12:16:50,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:50,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:16:50,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:16:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=746, Unknown=36, NotChecked=0, Total=930 [2023-09-01 12:16:51,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 435 [2023-09-01 12:16:51,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 187 transitions, 3229 flow. Second operand has 31 states, 31 states have (on average 124.51612903225806) internal successors, (3860), 31 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:51,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:51,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 435 [2023-09-01 12:16:51,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:53,072 INFO L130 PetriNetUnfolder]: 2160/3854 cut-off events. [2023-09-01 12:16:53,073 INFO L131 PetriNetUnfolder]: For 43660/43660 co-relation queries the response was YES. [2023-09-01 12:16:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25523 conditions, 3854 events. 2160/3854 cut-off events. For 43660/43660 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24155 event pairs, 228 based on Foata normal form. 56/3910 useless extension candidates. Maximal degree in co-relation 25447. Up to 1452 conditions per place. [2023-09-01 12:16:53,101 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 186 selfloop transitions, 105 changer transitions 0/291 dead transitions. [2023-09-01 12:16:53,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 291 transitions, 4976 flow [2023-09-01 12:16:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:16:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:16:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2070 transitions. [2023-09-01 12:16:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974137931034483 [2023-09-01 12:16:53,104 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2070 transitions. [2023-09-01 12:16:53,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2070 transitions. [2023-09-01 12:16:53,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:53,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2070 transitions. [2023-09-01 12:16:53,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 129.375) internal successors, (2070), 16 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:53,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:53,111 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:53,111 INFO L175 Difference]: Start difference. First operand has 147 places, 187 transitions, 3229 flow. Second operand 16 states and 2070 transitions. [2023-09-01 12:16:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 291 transitions, 4976 flow [2023-09-01 12:16:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 291 transitions, 4793 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-09-01 12:16:53,259 INFO L231 Difference]: Finished difference. Result has 156 places, 213 transitions, 3708 flow [2023-09-01 12:16:53,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3708, PETRI_PLACES=156, PETRI_TRANSITIONS=213} [2023-09-01 12:16:53,260 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 131 predicate places. [2023-09-01 12:16:53,260 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 213 transitions, 3708 flow [2023-09-01 12:16:53,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 124.51612903225806) internal successors, (3860), 31 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:53,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:53,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:53,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:53,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:53,465 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:53,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1777071356, now seen corresponding path program 14 times [2023-09-01 12:16:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734220894] [2023-09-01 12:16:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:53,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734220894] [2023-09-01 12:16:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734220894] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:53,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006521691] [2023-09-01 12:16:53,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:53,778 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) [2023-09-01 12:16:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 12:16:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:16:53,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:53,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:16:53,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:54,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:54,149 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 12:16:54,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-09-01 12:16:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:54,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006521691] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:54,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:54,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-09-01 12:16:54,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887088889] [2023-09-01 12:16:54,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:54,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:54,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:54,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:16:54,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:16:54,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 213 transitions, 3708 flow. Second operand has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:54,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:54,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:16:54,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:55,100 INFO L130 PetriNetUnfolder]: 2128/3754 cut-off events. [2023-09-01 12:16:55,101 INFO L131 PetriNetUnfolder]: For 43171/43171 co-relation queries the response was YES. [2023-09-01 12:16:55,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26293 conditions, 3754 events. 2128/3754 cut-off events. For 43171/43171 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23168 event pairs, 722 based on Foata normal form. 6/3760 useless extension candidates. Maximal degree in co-relation 26215. Up to 2770 conditions per place. [2023-09-01 12:16:55,131 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 179 selfloop transitions, 65 changer transitions 0/244 dead transitions. [2023-09-01 12:16:55,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 4480 flow [2023-09-01 12:16:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:16:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:16:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1702 transitions. [2023-09-01 12:16:55,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391264367816092 [2023-09-01 12:16:55,201 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1702 transitions. [2023-09-01 12:16:55,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1702 transitions. [2023-09-01 12:16:55,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:55,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1702 transitions. [2023-09-01 12:16:55,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.2) internal successors, (1702), 10 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:55,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:55,205 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:55,205 INFO L175 Difference]: Start difference. First operand has 156 places, 213 transitions, 3708 flow. Second operand 10 states and 1702 transitions. [2023-09-01 12:16:55,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 4480 flow [2023-09-01 12:16:55,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 244 transitions, 4257 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-09-01 12:16:55,322 INFO L231 Difference]: Finished difference. Result has 158 places, 216 transitions, 3816 flow [2023-09-01 12:16:55,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3816, PETRI_PLACES=158, PETRI_TRANSITIONS=216} [2023-09-01 12:16:55,323 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2023-09-01 12:16:55,323 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 216 transitions, 3816 flow [2023-09-01 12:16:55,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.9) internal successors, (1659), 10 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:55,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:55,323 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] [2023-09-01 12:16:55,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:55,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:55,528 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:16:55,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:55,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1175767787, now seen corresponding path program 1 times [2023-09-01 12:16:55,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:55,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811037854] [2023-09-01 12:16:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811037854] [2023-09-01 12:16:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811037854] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307164053] [2023-09-01 12:16:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:55,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:55,801 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) [2023-09-01 12:16:55,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 12:16:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:16:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:56,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:56,241 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 128 treesize of output 93 [2023-09-01 12:16:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:56,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:56,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:56,359 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 [2023-09-01 12:16:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307164053] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:16:56,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:16:56,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-09-01 12:16:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85740888] [2023-09-01 12:16:56,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:16:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:16:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:56,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:16:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:16:57,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:16:57,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 216 transitions, 3816 flow. Second operand has 26 states, 26 states have (on average 165.15384615384616) internal successors, (4294), 26 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:57,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:57,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:16:57,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:59,352 INFO L130 PetriNetUnfolder]: 4691/7870 cut-off events. [2023-09-01 12:16:59,352 INFO L131 PetriNetUnfolder]: For 91949/91949 co-relation queries the response was YES. [2023-09-01 12:16:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56257 conditions, 7870 events. 4691/7870 cut-off events. For 91949/91949 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52230 event pairs, 849 based on Foata normal form. 130/8000 useless extension candidates. Maximal degree in co-relation 55771. Up to 2182 conditions per place. [2023-09-01 12:16:59,480 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 502 selfloop transitions, 169 changer transitions 46/717 dead transitions. [2023-09-01 12:16:59,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 717 transitions, 13367 flow [2023-09-01 12:16:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:16:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:16:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3744 transitions. [2023-09-01 12:16:59,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39122257053291537 [2023-09-01 12:16:59,488 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3744 transitions. [2023-09-01 12:16:59,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3744 transitions. [2023-09-01 12:16:59,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:59,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3744 transitions. [2023-09-01 12:16:59,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 170.1818181818182) internal successors, (3744), 22 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:59,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:59,495 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:59,495 INFO L175 Difference]: Start difference. First operand has 158 places, 216 transitions, 3816 flow. Second operand 22 states and 3744 transitions. [2023-09-01 12:16:59,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 717 transitions, 13367 flow [2023-09-01 12:16:59,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 717 transitions, 13024 flow, removed 81 selfloop flow, removed 6 redundant places. [2023-09-01 12:16:59,867 INFO L231 Difference]: Finished difference. Result has 187 places, 338 transitions, 6888 flow [2023-09-01 12:16:59,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6888, PETRI_PLACES=187, PETRI_TRANSITIONS=338} [2023-09-01 12:16:59,868 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2023-09-01 12:16:59,868 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 338 transitions, 6888 flow [2023-09-01 12:16:59,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 165.15384615384616) internal successors, (4294), 26 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:59,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:59,869 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] [2023-09-01 12:16:59,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:00,073 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:00,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1835803252, now seen corresponding path program 1 times [2023-09-01 12:17:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:00,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077744343] [2023-09-01 12:17:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:00,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077744343] [2023-09-01 12:17:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077744343] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173896690] [2023-09-01 12:17:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:00,850 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:00,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 12:17:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:17:00,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:01,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:01,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:01,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:01,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:01,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173896690] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:01,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 28 [2023-09-01 12:17:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724124536] [2023-09-01 12:17:01,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:17:02,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 435 [2023-09-01 12:17:02,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 338 transitions, 6888 flow. Second operand has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:02,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:02,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 435 [2023-09-01 12:17:02,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:04,284 INFO L130 PetriNetUnfolder]: 4573/7672 cut-off events. [2023-09-01 12:17:04,284 INFO L131 PetriNetUnfolder]: For 108265/108265 co-relation queries the response was YES. [2023-09-01 12:17:04,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59887 conditions, 7672 events. 4573/7672 cut-off events. For 108265/108265 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 50654 event pairs, 1417 based on Foata normal form. 3/7675 useless extension candidates. Maximal degree in co-relation 59387. Up to 6451 conditions per place. [2023-09-01 12:17:04,343 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 357 selfloop transitions, 49 changer transitions 12/418 dead transitions. [2023-09-01 12:17:04,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 418 transitions, 9007 flow [2023-09-01 12:17:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:17:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:17:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1795 transitions. [2023-09-01 12:17:04,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37513061650992685 [2023-09-01 12:17:04,345 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1795 transitions. [2023-09-01 12:17:04,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1795 transitions. [2023-09-01 12:17:04,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:04,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1795 transitions. [2023-09-01 12:17:04,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:04,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:04,349 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:04,349 INFO L175 Difference]: Start difference. First operand has 187 places, 338 transitions, 6888 flow. Second operand 11 states and 1795 transitions. [2023-09-01 12:17:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 418 transitions, 9007 flow [2023-09-01 12:17:04,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 418 transitions, 8894 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:04,883 INFO L231 Difference]: Finished difference. Result has 197 places, 362 transitions, 7322 flow [2023-09-01 12:17:04,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7322, PETRI_PLACES=197, PETRI_TRANSITIONS=362} [2023-09-01 12:17:04,884 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 172 predicate places. [2023-09-01 12:17:04,884 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 362 transitions, 7322 flow [2023-09-01 12:17:04,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:04,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:04,885 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] [2023-09-01 12:17:04,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 12:17:05,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 12:17:05,089 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:05,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 717068420, now seen corresponding path program 2 times [2023-09-01 12:17:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473245168] [2023-09-01 12:17:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:05,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473245168] [2023-09-01 12:17:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473245168] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241585109] [2023-09-01 12:17:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:17:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:05,808 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:05,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 12:17:05,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:17:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:17:05,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:06,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:06,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:06,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241585109] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:06,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-09-01 12:17:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202969988] [2023-09-01 12:17:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:06,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:17:06,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:17:06,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 362 transitions, 7322 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:06,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:06,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:17:06,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:08,180 INFO L130 PetriNetUnfolder]: 4711/7955 cut-off events. [2023-09-01 12:17:08,180 INFO L131 PetriNetUnfolder]: For 119814/119814 co-relation queries the response was YES. [2023-09-01 12:17:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63619 conditions, 7955 events. 4711/7955 cut-off events. For 119814/119814 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 53726 event pairs, 1251 based on Foata normal form. 6/7961 useless extension candidates. Maximal degree in co-relation 63262. Up to 5571 conditions per place. [2023-09-01 12:17:08,262 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 371 selfloop transitions, 74 changer transitions 24/469 dead transitions. [2023-09-01 12:17:08,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 469 transitions, 10062 flow [2023-09-01 12:17:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1544 transitions. [2023-09-01 12:17:08,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39438058748403576 [2023-09-01 12:17:08,265 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1544 transitions. [2023-09-01 12:17:08,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1544 transitions. [2023-09-01 12:17:08,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:08,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1544 transitions. [2023-09-01 12:17:08,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.55555555555554) internal successors, (1544), 9 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:08,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:08,268 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:08,268 INFO L175 Difference]: Start difference. First operand has 197 places, 362 transitions, 7322 flow. Second operand 9 states and 1544 transitions. [2023-09-01 12:17:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 469 transitions, 10062 flow [2023-09-01 12:17:08,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 469 transitions, 10024 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 12:17:08,855 INFO L231 Difference]: Finished difference. Result has 202 places, 369 transitions, 7791 flow [2023-09-01 12:17:08,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=7298, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7791, PETRI_PLACES=202, PETRI_TRANSITIONS=369} [2023-09-01 12:17:08,855 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 177 predicate places. [2023-09-01 12:17:08,855 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 369 transitions, 7791 flow [2023-09-01 12:17:08,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:08,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:08,856 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] [2023-09-01 12:17:08,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:09,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 12:17:09,061 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:09,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1526172356, now seen corresponding path program 3 times [2023-09-01 12:17:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972291319] [2023-09-01 12:17:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:09,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:09,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972291319] [2023-09-01 12:17:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972291319] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:09,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058466682] [2023-09-01 12:17:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:17:09,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:09,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:09,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:09,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 12:17:09,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:17:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:17:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:10,212 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:17:10,213 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 79 treesize of output 43 [2023-09-01 12:17:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:10,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058466682] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-09-01 12:17:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597001536] [2023-09-01 12:17:10,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:10,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:10,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:17:10,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:17:10,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 369 transitions, 7791 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:10,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:10,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:17:10,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:12,139 INFO L130 PetriNetUnfolder]: 4815/8175 cut-off events. [2023-09-01 12:17:12,139 INFO L131 PetriNetUnfolder]: For 134457/134457 co-relation queries the response was YES. [2023-09-01 12:17:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67341 conditions, 8175 events. 4815/8175 cut-off events. For 134457/134457 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55908 event pairs, 1302 based on Foata normal form. 6/8181 useless extension candidates. Maximal degree in co-relation 66951. Up to 5571 conditions per place. [2023-09-01 12:17:12,316 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 423 selfloop transitions, 70 changer transitions 11/504 dead transitions. [2023-09-01 12:17:12,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 504 transitions, 11491 flow [2023-09-01 12:17:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1547 transitions. [2023-09-01 12:17:12,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39514687100893997 [2023-09-01 12:17:12,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1547 transitions. [2023-09-01 12:17:12,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1547 transitions. [2023-09-01 12:17:12,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:12,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1547 transitions. [2023-09-01 12:17:12,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.88888888888889) internal successors, (1547), 9 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:12,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:12,322 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:12,322 INFO L175 Difference]: Start difference. First operand has 202 places, 369 transitions, 7791 flow. Second operand 9 states and 1547 transitions. [2023-09-01 12:17:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 504 transitions, 11491 flow [2023-09-01 12:17:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 504 transitions, 11173 flow, removed 124 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:12,969 INFO L231 Difference]: Finished difference. Result has 206 places, 385 transitions, 8157 flow [2023-09-01 12:17:12,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8157, PETRI_PLACES=206, PETRI_TRANSITIONS=385} [2023-09-01 12:17:12,969 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 181 predicate places. [2023-09-01 12:17:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 385 transitions, 8157 flow [2023-09-01 12:17:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:12,970 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] [2023-09-01 12:17:12,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 12:17:13,175 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:13,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1843499728, now seen corresponding path program 4 times [2023-09-01 12:17:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:13,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006238640] [2023-09-01 12:17:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:13,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:13,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006238640] [2023-09-01 12:17:13,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006238640] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:13,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899544841] [2023-09-01 12:17:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:17:13,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:13,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:13,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:13,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 12:17:14,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:17:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:17:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:14,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:14,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:14,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:14,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:14,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:14,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:14,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899544841] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:14,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:14,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 12] total 31 [2023-09-01 12:17:14,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743249760] [2023-09-01 12:17:14,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:14,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:17:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:17:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:17:15,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 435 [2023-09-01 12:17:15,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 385 transitions, 8157 flow. Second operand has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:15,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:15,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 435 [2023-09-01 12:17:15,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:18,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:17:20,289 INFO L130 PetriNetUnfolder]: 4862/8269 cut-off events. [2023-09-01 12:17:20,289 INFO L131 PetriNetUnfolder]: For 142626/142626 co-relation queries the response was YES. [2023-09-01 12:17:20,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 8269 events. 4862/8269 cut-off events. For 142626/142626 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56729 event pairs, 1490 based on Foata normal form. 3/8272 useless extension candidates. Maximal degree in co-relation 69326. Up to 6812 conditions per place. [2023-09-01 12:17:20,371 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 392 selfloop transitions, 61 changer transitions 17/470 dead transitions. [2023-09-01 12:17:20,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 470 transitions, 10680 flow [2023-09-01 12:17:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1573 transitions. [2023-09-01 12:17:20,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017879948914432 [2023-09-01 12:17:20,373 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1573 transitions. [2023-09-01 12:17:20,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1573 transitions. [2023-09-01 12:17:20,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:20,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1573 transitions. [2023-09-01 12:17:20,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.77777777777777) internal successors, (1573), 9 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:20,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:20,376 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:20,376 INFO L175 Difference]: Start difference. First operand has 206 places, 385 transitions, 8157 flow. Second operand 9 states and 1573 transitions. [2023-09-01 12:17:20,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 470 transitions, 10680 flow [2023-09-01 12:17:21,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 470 transitions, 10605 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 12:17:21,085 INFO L231 Difference]: Finished difference. Result has 213 places, 396 transitions, 8512 flow [2023-09-01 12:17:21,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8086, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8512, PETRI_PLACES=213, PETRI_TRANSITIONS=396} [2023-09-01 12:17:21,087 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-09-01 12:17:21,087 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 396 transitions, 8512 flow [2023-09-01 12:17:21,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:21,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:21,088 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] [2023-09-01 12:17:21,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 12:17:21,293 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:21,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1503335692, now seen corresponding path program 5 times [2023-09-01 12:17:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662901004] [2023-09-01 12:17:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:21,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662901004] [2023-09-01 12:17:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662901004] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:21,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646056636] [2023-09-01 12:17:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:17:21,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:21,953 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:21,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 12:17:22,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:17:22,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:22,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:17:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:22,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:22,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:22,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:22,434 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:17:22,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 43 [2023-09-01 12:17:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:23,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646056636] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:23,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:23,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 31 [2023-09-01 12:17:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972885010] [2023-09-01 12:17:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 12:17:23,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 435 [2023-09-01 12:17:23,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 396 transitions, 8512 flow. Second operand has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:23,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:23,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 435 [2023-09-01 12:17:23,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:25,669 INFO L130 PetriNetUnfolder]: 4870/8283 cut-off events. [2023-09-01 12:17:25,670 INFO L131 PetriNetUnfolder]: For 145384/145384 co-relation queries the response was YES. [2023-09-01 12:17:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70255 conditions, 8283 events. 4870/8283 cut-off events. For 145384/145384 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 56885 event pairs, 1488 based on Foata normal form. 3/8286 useless extension candidates. Maximal degree in co-relation 69844. Up to 6805 conditions per place. [2023-09-01 12:17:25,757 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 388 selfloop transitions, 58 changer transitions 10/456 dead transitions. [2023-09-01 12:17:25,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 456 transitions, 10514 flow [2023-09-01 12:17:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:17:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:17:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1797 transitions. [2023-09-01 12:17:25,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755485893416928 [2023-09-01 12:17:25,760 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1797 transitions. [2023-09-01 12:17:25,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1797 transitions. [2023-09-01 12:17:25,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:25,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1797 transitions. [2023-09-01 12:17:25,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:25,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:25,764 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:25,764 INFO L175 Difference]: Start difference. First operand has 213 places, 396 transitions, 8512 flow. Second operand 11 states and 1797 transitions. [2023-09-01 12:17:25,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 456 transitions, 10514 flow [2023-09-01 12:17:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 456 transitions, 10390 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:26,510 INFO L231 Difference]: Finished difference. Result has 218 places, 397 transitions, 8553 flow [2023-09-01 12:17:26,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8396, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8553, PETRI_PLACES=218, PETRI_TRANSITIONS=397} [2023-09-01 12:17:26,511 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2023-09-01 12:17:26,511 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 397 transitions, 8553 flow [2023-09-01 12:17:26,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:26,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:26,511 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] [2023-09-01 12:17:26,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:26,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 12:17:26,716 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:26,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1925954328, now seen corresponding path program 6 times [2023-09-01 12:17:26,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:26,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522165956] [2023-09-01 12:17:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:26,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522165956] [2023-09-01 12:17:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522165956] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684724939] [2023-09-01 12:17:27,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:17:27,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:27,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:27,641 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:27,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 12:17:27,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:17:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:17:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:27,985 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:17:27,985 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 79 treesize of output 43 [2023-09-01 12:17:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:28,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684724939] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-09-01 12:17:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091575691] [2023-09-01 12:17:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:17:28,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:17:28,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 397 transitions, 8553 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:28,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:28,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:17:28,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:29,964 INFO L130 PetriNetUnfolder]: 4901/8372 cut-off events. [2023-09-01 12:17:29,964 INFO L131 PetriNetUnfolder]: For 147799/147799 co-relation queries the response was YES. [2023-09-01 12:17:30,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70974 conditions, 8372 events. 4901/8372 cut-off events. For 147799/147799 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 58017 event pairs, 1273 based on Foata normal form. 9/8381 useless extension candidates. Maximal degree in co-relation 70563. Up to 5571 conditions per place. [2023-09-01 12:17:30,056 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 397 selfloop transitions, 100 changer transitions 11/508 dead transitions. [2023-09-01 12:17:30,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 508 transitions, 11635 flow [2023-09-01 12:17:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1547 transitions. [2023-09-01 12:17:30,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39514687100893997 [2023-09-01 12:17:30,058 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1547 transitions. [2023-09-01 12:17:30,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1547 transitions. [2023-09-01 12:17:30,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:30,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1547 transitions. [2023-09-01 12:17:30,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.88888888888889) internal successors, (1547), 9 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:30,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:30,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:30,061 INFO L175 Difference]: Start difference. First operand has 218 places, 397 transitions, 8553 flow. Second operand 9 states and 1547 transitions. [2023-09-01 12:17:30,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 508 transitions, 11635 flow [2023-09-01 12:17:30,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 508 transitions, 11481 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-09-01 12:17:30,839 INFO L231 Difference]: Finished difference. Result has 220 places, 419 transitions, 9214 flow [2023-09-01 12:17:30,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8427, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9214, PETRI_PLACES=220, PETRI_TRANSITIONS=419} [2023-09-01 12:17:30,839 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2023-09-01 12:17:30,839 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 419 transitions, 9214 flow [2023-09-01 12:17:30,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:30,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:30,840 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] [2023-09-01 12:17:30,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:31,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-09-01 12:17:31,045 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:31,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash -804013576, now seen corresponding path program 7 times [2023-09-01 12:17:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930619470] [2023-09-01 12:17:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:31,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930619470] [2023-09-01 12:17:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930619470] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690793668] [2023-09-01 12:17:31,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:17:31,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:31,814 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:31,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 12:17:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:17:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:32,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:32,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:32,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:32,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:32,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690793668] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:32,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 30 [2023-09-01 12:17:32,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942883086] [2023-09-01 12:17:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:17:33,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 435 [2023-09-01 12:17:33,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 419 transitions, 9214 flow. Second operand has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:33,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:33,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 435 [2023-09-01 12:17:33,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:35,321 INFO L130 PetriNetUnfolder]: 4874/8318 cut-off events. [2023-09-01 12:17:35,321 INFO L131 PetriNetUnfolder]: For 151162/151162 co-relation queries the response was YES. [2023-09-01 12:17:35,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71412 conditions, 8318 events. 4874/8318 cut-off events. For 151162/151162 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57488 event pairs, 1488 based on Foata normal form. 6/8324 useless extension candidates. Maximal degree in co-relation 71013. Up to 6885 conditions per place. [2023-09-01 12:17:35,415 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 366 selfloop transitions, 83 changer transitions 24/473 dead transitions. [2023-09-01 12:17:35,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 473 transitions, 11060 flow [2023-09-01 12:17:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:17:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:17:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1801 transitions. [2023-09-01 12:17:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763845350052247 [2023-09-01 12:17:35,417 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1801 transitions. [2023-09-01 12:17:35,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1801 transitions. [2023-09-01 12:17:35,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:35,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1801 transitions. [2023-09-01 12:17:35,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.72727272727272) internal successors, (1801), 11 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:35,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:35,421 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:35,421 INFO L175 Difference]: Start difference. First operand has 220 places, 419 transitions, 9214 flow. Second operand 11 states and 1801 transitions. [2023-09-01 12:17:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 473 transitions, 11060 flow [2023-09-01 12:17:36,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 473 transitions, 10919 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:36,236 INFO L231 Difference]: Finished difference. Result has 228 places, 421 transitions, 9334 flow [2023-09-01 12:17:36,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9077, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9334, PETRI_PLACES=228, PETRI_TRANSITIONS=421} [2023-09-01 12:17:36,236 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2023-09-01 12:17:36,237 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 421 transitions, 9334 flow [2023-09-01 12:17:36,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:36,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:36,237 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] [2023-09-01 12:17:36,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:36,442 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:36,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash -371235756, now seen corresponding path program 8 times [2023-09-01 12:17:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545399771] [2023-09-01 12:17:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545399771] [2023-09-01 12:17:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545399771] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018155026] [2023-09-01 12:17:36,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:17:36,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:36,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:36,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:36,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 12:17:37,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:17:37,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:17:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:37,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:37,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:37,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018155026] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:37,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:37,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-09-01 12:17:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801909385] [2023-09-01 12:17:37,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:37,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:37,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:17:37,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:17:37,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 421 transitions, 9334 flow. Second operand has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:37,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:37,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:17:37,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:39,524 INFO L130 PetriNetUnfolder]: 4843/8329 cut-off events. [2023-09-01 12:17:39,524 INFO L131 PetriNetUnfolder]: For 149545/149545 co-relation queries the response was YES. [2023-09-01 12:17:39,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70979 conditions, 8329 events. 4843/8329 cut-off events. For 149545/149545 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 58421 event pairs, 1339 based on Foata normal form. 6/8335 useless extension candidates. Maximal degree in co-relation 70631. Up to 5571 conditions per place. [2023-09-01 12:17:39,610 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 363 selfloop transitions, 102 changer transitions 38/503 dead transitions. [2023-09-01 12:17:39,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 503 transitions, 11566 flow [2023-09-01 12:17:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1543 transitions. [2023-09-01 12:17:39,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.394125159642401 [2023-09-01 12:17:39,612 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1543 transitions. [2023-09-01 12:17:39,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1543 transitions. [2023-09-01 12:17:39,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:39,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1543 transitions. [2023-09-01 12:17:39,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.44444444444446) internal successors, (1543), 9 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:39,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:39,615 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:39,615 INFO L175 Difference]: Start difference. First operand has 228 places, 421 transitions, 9334 flow. Second operand 9 states and 1543 transitions. [2023-09-01 12:17:39,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 503 transitions, 11566 flow [2023-09-01 12:17:40,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 503 transitions, 11414 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-09-01 12:17:40,448 INFO L231 Difference]: Finished difference. Result has 230 places, 408 transitions, 9055 flow [2023-09-01 12:17:40,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9194, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9055, PETRI_PLACES=230, PETRI_TRANSITIONS=408} [2023-09-01 12:17:40,448 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 205 predicate places. [2023-09-01 12:17:40,448 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 408 transitions, 9055 flow [2023-09-01 12:17:40,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:40,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:40,449 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] [2023-09-01 12:17:40,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:40,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:40,654 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:40,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1324051588, now seen corresponding path program 9 times [2023-09-01 12:17:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890146432] [2023-09-01 12:17:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890146432] [2023-09-01 12:17:41,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890146432] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493941941] [2023-09-01 12:17:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:17:41,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:41,228 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:41,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 12:17:41,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:17:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:17:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:41,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:41,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:41,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:41,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493941941] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:41,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:41,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-09-01 12:17:41,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693305785] [2023-09-01 12:17:41,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:41,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:17:42,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:17:42,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 408 transitions, 9055 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:42,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:42,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:17:42,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:43,842 INFO L130 PetriNetUnfolder]: 4788/8208 cut-off events. [2023-09-01 12:17:43,842 INFO L131 PetriNetUnfolder]: For 149171/149171 co-relation queries the response was YES. [2023-09-01 12:17:43,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70248 conditions, 8208 events. 4788/8208 cut-off events. For 149171/149171 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 57038 event pairs, 1325 based on Foata normal form. 6/8214 useless extension candidates. Maximal degree in co-relation 69844. Up to 5571 conditions per place. [2023-09-01 12:17:43,920 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 327 selfloop transitions, 104 changer transitions 29/460 dead transitions. [2023-09-01 12:17:43,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 460 transitions, 10610 flow [2023-09-01 12:17:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:17:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:17:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1541 transitions. [2023-09-01 12:17:43,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39361430395913155 [2023-09-01 12:17:43,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1541 transitions. [2023-09-01 12:17:43,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1541 transitions. [2023-09-01 12:17:43,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:43,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1541 transitions. [2023-09-01 12:17:43,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.22222222222223) internal successors, (1541), 9 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:43,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:43,925 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:43,925 INFO L175 Difference]: Start difference. First operand has 230 places, 408 transitions, 9055 flow. Second operand 9 states and 1541 transitions. [2023-09-01 12:17:43,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 460 transitions, 10610 flow [2023-09-01 12:17:44,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 460 transitions, 10455 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:44,655 INFO L231 Difference]: Finished difference. Result has 233 places, 390 transitions, 8625 flow [2023-09-01 12:17:44,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8625, PETRI_PLACES=233, PETRI_TRANSITIONS=390} [2023-09-01 12:17:44,655 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 208 predicate places. [2023-09-01 12:17:44,656 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 390 transitions, 8625 flow [2023-09-01 12:17:44,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:44,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:44,656 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] [2023-09-01 12:17:44,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:44,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 12:17:44,861 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:44,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 833066182, now seen corresponding path program 10 times [2023-09-01 12:17:44,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:44,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383758701] [2023-09-01 12:17:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:44,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383758701] [2023-09-01 12:17:45,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383758701] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576439532] [2023-09-01 12:17:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:17:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:45,501 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:45,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 12:17:45,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:17:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:17:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:45,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:45,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:45,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:45,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:17:45,914 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 79 treesize of output 43 [2023-09-01 12:17:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:45,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:17:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576439532] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:46,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13, 11] total 29 [2023-09-01 12:17:46,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708979845] [2023-09-01 12:17:46,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:46,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:17:46,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:17:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:17:47,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 435 [2023-09-01 12:17:47,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 390 transitions, 8625 flow. Second operand has 8 states, 8 states have (on average 169.5) internal successors, (1356), 8 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:47,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:47,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 435 [2023-09-01 12:17:47,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:49,088 INFO L130 PetriNetUnfolder]: 4750/8083 cut-off events. [2023-09-01 12:17:49,088 INFO L131 PetriNetUnfolder]: For 149976/149976 co-relation queries the response was YES. [2023-09-01 12:17:49,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69276 conditions, 8083 events. 4750/8083 cut-off events. For 149976/149976 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 55417 event pairs, 1488 based on Foata normal form. 3/8086 useless extension candidates. Maximal degree in co-relation 68985. Up to 6831 conditions per place. [2023-09-01 12:17:49,181 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 353 selfloop transitions, 67 changer transitions 5/425 dead transitions. [2023-09-01 12:17:49,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 425 transitions, 9853 flow [2023-09-01 12:17:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:17:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:17:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1401 transitions. [2023-09-01 12:17:49,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025862068965517 [2023-09-01 12:17:49,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1401 transitions. [2023-09-01 12:17:49,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1401 transitions. [2023-09-01 12:17:49,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:49,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1401 transitions. [2023-09-01 12:17:49,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.125) internal successors, (1401), 8 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:49,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:49,186 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:49,186 INFO L175 Difference]: Start difference. First operand has 233 places, 390 transitions, 8625 flow. Second operand 8 states and 1401 transitions. [2023-09-01 12:17:49,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 425 transitions, 9853 flow [2023-09-01 12:17:50,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 425 transitions, 9546 flow, removed 34 selfloop flow, removed 12 redundant places. [2023-09-01 12:17:50,071 INFO L231 Difference]: Finished difference. Result has 224 places, 390 transitions, 8483 flow [2023-09-01 12:17:50,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8483, PETRI_PLACES=224, PETRI_TRANSITIONS=390} [2023-09-01 12:17:50,071 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 199 predicate places. [2023-09-01 12:17:50,071 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 390 transitions, 8483 flow [2023-09-01 12:17:50,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.5) internal successors, (1356), 8 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:50,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:50,072 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] [2023-09-01 12:17:50,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:50,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:50,276 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:50,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash 460643924, now seen corresponding path program 11 times [2023-09-01 12:17:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644929218] [2023-09-01 12:17:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644929218] [2023-09-01 12:17:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644929218] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778797888] [2023-09-01 12:17:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:17:50,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:50,959 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:50,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 12:17:51,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:17:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 12:17:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:51,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:17:51,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:51,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:17:51,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:17:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:51,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:54,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-09-01 12:17:54,137 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 12:17:54,137 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 566 treesize of output 509 [2023-09-01 12:17:54,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-09-01 12:17:54,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-09-01 12:17:54,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-09-01 12:17:54,397 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 12:17:54,397 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 1142 treesize of output 1021 [2023-09-01 12:17:54,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-09-01 12:17:54,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-09-01 12:17:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778797888] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:17:54,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:17:54,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-09-01 12:17:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591278374] [2023-09-01 12:17:54,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:17:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 12:17:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 12:17:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1205, Unknown=13, NotChecked=0, Total=1482 [2023-09-01 12:17:55,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 435 [2023-09-01 12:17:55,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 390 transitions, 8483 flow. Second operand has 39 states, 39 states have (on average 107.41025641025641) internal successors, (4189), 39 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:55,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:55,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 435 [2023-09-01 12:17:55,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:59,218 INFO L130 PetriNetUnfolder]: 4818/8255 cut-off events. [2023-09-01 12:17:59,218 INFO L131 PetriNetUnfolder]: For 144148/144148 co-relation queries the response was YES. [2023-09-01 12:17:59,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69736 conditions, 8255 events. 4818/8255 cut-off events. For 144148/144148 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 57420 event pairs, 874 based on Foata normal form. 38/8293 useless extension candidates. Maximal degree in co-relation 69338. Up to 5153 conditions per place. [2023-09-01 12:17:59,306 INFO L137 encePairwiseOnDemand]: 420/435 looper letters, 251 selfloop transitions, 247 changer transitions 24/522 dead transitions. [2023-09-01 12:17:59,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 522 transitions, 11269 flow [2023-09-01 12:17:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 12:17:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 12:17:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2985 transitions. [2023-09-01 12:17:59,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2541507024265645 [2023-09-01 12:17:59,309 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2985 transitions. [2023-09-01 12:17:59,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2985 transitions. [2023-09-01 12:17:59,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:59,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2985 transitions. [2023-09-01 12:17:59,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.55555555555556) internal successors, (2985), 27 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:59,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:59,316 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:59,316 INFO L175 Difference]: Start difference. First operand has 224 places, 390 transitions, 8483 flow. Second operand 27 states and 2985 transitions. [2023-09-01 12:17:59,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 522 transitions, 11269 flow [2023-09-01 12:18:00,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 522 transitions, 11113 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-09-01 12:18:00,156 INFO L231 Difference]: Finished difference. Result has 250 places, 425 transitions, 9569 flow [2023-09-01 12:18:00,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8335, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9569, PETRI_PLACES=250, PETRI_TRANSITIONS=425} [2023-09-01 12:18:00,156 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 225 predicate places. [2023-09-01 12:18:00,157 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 425 transitions, 9569 flow [2023-09-01 12:18:00,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 107.41025641025641) internal successors, (4189), 39 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:00,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:00,158 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] [2023-09-01 12:18:00,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 12:18:00,363 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:00,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1337180468, now seen corresponding path program 12 times [2023-09-01 12:18:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405122105] [2023-09-01 12:18:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:00,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405122105] [2023-09-01 12:18:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405122105] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901555397] [2023-09-01 12:18:00,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:18:00,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:00,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:00,822 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:00,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 12:18:00,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:18:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:18:00,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:01,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:01,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:18:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:18:01,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:18:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901555397] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:18:01,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:18:01,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-09-01 12:18:01,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657611859] [2023-09-01 12:18:01,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:01,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:18:01,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:18:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:18:01,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 435 [2023-09-01 12:18:01,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 425 transitions, 9569 flow. Second operand has 11 states, 11 states have (on average 166.8181818181818) internal successors, (1835), 11 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:01,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:01,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 435 [2023-09-01 12:18:01,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:03,465 INFO L130 PetriNetUnfolder]: 4798/8190 cut-off events. [2023-09-01 12:18:03,465 INFO L131 PetriNetUnfolder]: For 158059/158059 co-relation queries the response was YES. [2023-09-01 12:18:03,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72107 conditions, 8190 events. 4798/8190 cut-off events. For 158059/158059 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 56528 event pairs, 908 based on Foata normal form. 3/8193 useless extension candidates. Maximal degree in co-relation 71992. Up to 5309 conditions per place. [2023-09-01 12:18:03,567 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 254 selfloop transitions, 188 changer transitions 21/463 dead transitions. [2023-09-01 12:18:03,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 463 transitions, 10881 flow [2023-09-01 12:18:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:18:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:18:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1542 transitions. [2023-09-01 12:18:03,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938697318007663 [2023-09-01 12:18:03,569 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1542 transitions. [2023-09-01 12:18:03,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1542 transitions. [2023-09-01 12:18:03,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:03,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1542 transitions. [2023-09-01 12:18:03,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.33333333333334) internal successors, (1542), 9 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:03,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:03,572 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:03,573 INFO L175 Difference]: Start difference. First operand has 250 places, 425 transitions, 9569 flow. Second operand 9 states and 1542 transitions. [2023-09-01 12:18:03,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 463 transitions, 10881 flow [2023-09-01 12:18:04,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 463 transitions, 10188 flow, removed 89 selfloop flow, removed 24 redundant places. [2023-09-01 12:18:04,570 INFO L231 Difference]: Finished difference. Result has 233 places, 415 transitions, 9013 flow [2023-09-01 12:18:04,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8890, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9013, PETRI_PLACES=233, PETRI_TRANSITIONS=415} [2023-09-01 12:18:04,571 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 208 predicate places. [2023-09-01 12:18:04,571 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 415 transitions, 9013 flow [2023-09-01 12:18:04,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.8181818181818) internal successors, (1835), 11 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:04,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:04,572 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] [2023-09-01 12:18:04,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:04,777 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:04,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1332691738, now seen corresponding path program 13 times [2023-09-01 12:18:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:04,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651049391] [2023-09-01 12:18:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:05,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:05,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651049391] [2023-09-01 12:18:05,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651049391] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:05,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337545040] [2023-09-01 12:18:05,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:18:05,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:05,391 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:05,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 12:18:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:18:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:05,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:18:05,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:05,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:05,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:05,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:18:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:05,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:18:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337545040] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:06,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:18:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 31 [2023-09-01 12:18:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919217294] [2023-09-01 12:18:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:18:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:18:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=866, Unknown=17, NotChecked=0, Total=1056 [2023-09-01 12:18:06,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 435 [2023-09-01 12:18:06,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 415 transitions, 9013 flow. Second operand has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:06,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:06,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 435 [2023-09-01 12:18:06,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:08,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:10,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:13,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:16,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:17,625 INFO L130 PetriNetUnfolder]: 4773/8132 cut-off events. [2023-09-01 12:18:17,625 INFO L131 PetriNetUnfolder]: For 160205/160205 co-relation queries the response was YES. [2023-09-01 12:18:17,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71737 conditions, 8132 events. 4773/8132 cut-off events. For 160205/160205 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 55872 event pairs, 1412 based on Foata normal form. 3/8135 useless extension candidates. Maximal degree in co-relation 71598. Up to 5567 conditions per place. [2023-09-01 12:18:17,696 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 374 selfloop transitions, 117 changer transitions 17/508 dead transitions. [2023-09-01 12:18:17,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 508 transitions, 11732 flow [2023-09-01 12:18:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:18:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:18:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1830 transitions. [2023-09-01 12:18:17,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30049261083743845 [2023-09-01 12:18:17,698 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1830 transitions. [2023-09-01 12:18:17,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1830 transitions. [2023-09-01 12:18:17,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:17,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1830 transitions. [2023-09-01 12:18:17,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 130.71428571428572) internal successors, (1830), 14 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:17,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:17,703 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:17,703 INFO L175 Difference]: Start difference. First operand has 233 places, 415 transitions, 9013 flow. Second operand 14 states and 1830 transitions. [2023-09-01 12:18:17,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 508 transitions, 11732 flow [2023-09-01 12:18:18,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 508 transitions, 11168 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-09-01 12:18:18,437 INFO L231 Difference]: Finished difference. Result has 232 places, 424 transitions, 9019 flow [2023-09-01 12:18:18,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8507, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9019, PETRI_PLACES=232, PETRI_TRANSITIONS=424} [2023-09-01 12:18:18,437 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2023-09-01 12:18:18,438 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 424 transitions, 9019 flow [2023-09-01 12:18:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:18,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:18,438 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] [2023-09-01 12:18:18,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 12:18:18,643 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:18,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1882099392, now seen corresponding path program 14 times [2023-09-01 12:18:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248772991] [2023-09-01 12:18:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:19,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248772991] [2023-09-01 12:18:19,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248772991] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:19,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480046779] [2023-09-01 12:18:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:18:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:19,173 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:19,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 12:18:19,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:18:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:18:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:19,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:18:19,528 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 79 treesize of output 43 [2023-09-01 12:18:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:18:19,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:18:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480046779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:18:19,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:18:19,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-09-01 12:18:19,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985820013] [2023-09-01 12:18:19,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:19,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:18:19,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:18:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:18:19,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 435 [2023-09-01 12:18:19,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 424 transitions, 9019 flow. Second operand has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:19,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:19,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 435 [2023-09-01 12:18:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:21,274 INFO L130 PetriNetUnfolder]: 4763/8098 cut-off events. [2023-09-01 12:18:21,275 INFO L131 PetriNetUnfolder]: For 148025/148025 co-relation queries the response was YES. [2023-09-01 12:18:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69822 conditions, 8098 events. 4763/8098 cut-off events. For 148025/148025 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 55491 event pairs, 1314 based on Foata normal form. 3/8101 useless extension candidates. Maximal degree in co-relation 69461. Up to 5573 conditions per place. [2023-09-01 12:18:21,359 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 357 selfloop transitions, 116 changer transitions 10/483 dead transitions. [2023-09-01 12:18:21,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 483 transitions, 10996 flow [2023-09-01 12:18:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:18:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:18:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1540 transitions. [2023-09-01 12:18:21,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933588761174968 [2023-09-01 12:18:21,361 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1540 transitions. [2023-09-01 12:18:21,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1540 transitions. [2023-09-01 12:18:21,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:21,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1540 transitions. [2023-09-01 12:18:21,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.11111111111111) internal successors, (1540), 9 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:21,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:21,364 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:21,364 INFO L175 Difference]: Start difference. First operand has 232 places, 424 transitions, 9019 flow. Second operand 9 states and 1540 transitions. [2023-09-01 12:18:21,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 483 transitions, 10996 flow [2023-09-01 12:18:22,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 483 transitions, 10668 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-09-01 12:18:22,207 INFO L231 Difference]: Finished difference. Result has 230 places, 425 transitions, 8972 flow [2023-09-01 12:18:22,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8972, PETRI_PLACES=230, PETRI_TRANSITIONS=425} [2023-09-01 12:18:22,208 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 205 predicate places. [2023-09-01 12:18:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 425 transitions, 8972 flow [2023-09-01 12:18:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.8181818181818) internal successors, (1824), 11 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:22,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:22,209 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] [2023-09-01 12:18:22,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:22,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 12:18:22,414 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:22,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1856879290, now seen corresponding path program 15 times [2023-09-01 12:18:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:22,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043489707] [2023-09-01 12:18:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:23,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:23,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043489707] [2023-09-01 12:18:23,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043489707] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:23,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361330357] [2023-09-01 12:18:23,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:18:23,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:23,149 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:23,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 12:18:23,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:18:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:18:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:23,493 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:18:23,493 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 79 treesize of output 43 [2023-09-01 12:18:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:18:23,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:18:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361330357] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:18:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:18:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-09-01 12:18:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446681192] [2023-09-01 12:18:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:18:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:18:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:18:23,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:18:23,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 425 transitions, 8972 flow. Second operand has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:23,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:23,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:18:23,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:25,266 INFO L130 PetriNetUnfolder]: 4751/8086 cut-off events. [2023-09-01 12:18:25,266 INFO L131 PetriNetUnfolder]: For 145098/145098 co-relation queries the response was YES. [2023-09-01 12:18:25,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69653 conditions, 8086 events. 4751/8086 cut-off events. For 145098/145098 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55504 event pairs, 910 based on Foata normal form. 3/8089 useless extension candidates. Maximal degree in co-relation 69291. Up to 5309 conditions per place. [2023-09-01 12:18:25,351 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 281 selfloop transitions, 169 changer transitions 11/461 dead transitions. [2023-09-01 12:18:25,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 461 transitions, 10244 flow [2023-09-01 12:18:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:18:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:18:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1527 transitions. [2023-09-01 12:18:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39003831417624524 [2023-09-01 12:18:25,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1527 transitions. [2023-09-01 12:18:25,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1527 transitions. [2023-09-01 12:18:25,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:25,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1527 transitions. [2023-09-01 12:18:25,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.66666666666666) internal successors, (1527), 9 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,356 INFO L175 Difference]: Start difference. First operand has 230 places, 425 transitions, 8972 flow. Second operand 9 states and 1527 transitions. [2023-09-01 12:18:25,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 461 transitions, 10244 flow [2023-09-01 12:18:26,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 461 transitions, 9998 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-09-01 12:18:26,206 INFO L231 Difference]: Finished difference. Result has 231 places, 418 transitions, 8948 flow [2023-09-01 12:18:26,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8742, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8948, PETRI_PLACES=231, PETRI_TRANSITIONS=418} [2023-09-01 12:18:26,207 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 206 predicate places. [2023-09-01 12:18:26,207 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 418 transitions, 8948 flow [2023-09-01 12:18:26,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:26,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:26,207 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] [2023-09-01 12:18:26,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 12:18:26,412 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:26,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1229202098, now seen corresponding path program 16 times [2023-09-01 12:18:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43693422] [2023-09-01 12:18:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43693422] [2023-09-01 12:18:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43693422] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849123881] [2023-09-01 12:18:26,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:18:26,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:26,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:26,975 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:26,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 12:18:27,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:18:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:18:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:27,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:18:27,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:27,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:27,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:27,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 69 [2023-09-01 12:18:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:18:27,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:18:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:18:27,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849123881] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:27,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:18:27,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 12] total 31 [2023-09-01 12:18:27,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117265612] [2023-09-01 12:18:27,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:18:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:18:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:18:28,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 435 [2023-09-01 12:18:28,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 418 transitions, 8948 flow. Second operand has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:28,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:28,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 435 [2023-09-01 12:18:28,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:31,284 INFO L130 PetriNetUnfolder]: 4733/8058 cut-off events. [2023-09-01 12:18:31,284 INFO L131 PetriNetUnfolder]: For 153363/153363 co-relation queries the response was YES. [2023-09-01 12:18:31,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70385 conditions, 8058 events. 4733/8058 cut-off events. For 153363/153363 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 55200 event pairs, 906 based on Foata normal form. 3/8061 useless extension candidates. Maximal degree in co-relation 70023. Up to 5310 conditions per place. [2023-09-01 12:18:31,372 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 274 selfloop transitions, 168 changer transitions 16/458 dead transitions. [2023-09-01 12:18:31,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 458 transitions, 10249 flow [2023-09-01 12:18:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:18:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:18:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1566 transitions. [2023-09-01 12:18:31,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-09-01 12:18:31,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1566 transitions. [2023-09-01 12:18:31,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1566 transitions. [2023-09-01 12:18:31,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:31,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1566 transitions. [2023-09-01 12:18:31,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:31,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:31,397 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:31,398 INFO L175 Difference]: Start difference. First operand has 231 places, 418 transitions, 8948 flow. Second operand 9 states and 1566 transitions. [2023-09-01 12:18:31,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 458 transitions, 10249 flow [2023-09-01 12:18:32,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 458 transitions, 9917 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 12:18:32,264 INFO L231 Difference]: Finished difference. Result has 235 places, 411 transitions, 8843 flow [2023-09-01 12:18:32,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8623, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8843, PETRI_PLACES=235, PETRI_TRANSITIONS=411} [2023-09-01 12:18:32,265 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-09-01 12:18:32,265 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 411 transitions, 8843 flow [2023-09-01 12:18:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:32,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:32,266 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] [2023-09-01 12:18:32,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 12:18:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-09-01 12:18:32,470 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:32,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1948356054, now seen corresponding path program 17 times [2023-09-01 12:18:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:32,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536475019] [2023-09-01 12:18:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:33,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:33,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536475019] [2023-09-01 12:18:33,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536475019] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:33,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003960935] [2023-09-01 12:18:33,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:18:33,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:33,006 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:33,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 12:18:33,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:18:33,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:18:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:33,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:18:33,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:33,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:33,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:33,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:18:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:18:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003960935] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:34,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:18:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13, 11] total 33 [2023-09-01 12:18:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028662863] [2023-09-01 12:18:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:18:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:18:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=971, Unknown=20, NotChecked=0, Total=1190 [2023-09-01 12:18:34,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 435 [2023-09-01 12:18:34,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 411 transitions, 8843 flow. Second operand has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:34,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:34,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 435 [2023-09-01 12:18:34,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:34,899 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse21 (* c_thread1Thread1of1ForFork0_~i~0 4))) (let ((.cse5 (+ c_~get2~0.offset .cse21)) (.cse20 (select |c_#memory_int| c_~get2~0.base)) (.cse22 (* c_thread2Thread1of1ForFork1_~i~1 4))) (let ((.cse14 (+ .cse22 c_~get1~0.offset)) (.cse11 (select .cse20 (+ c_~get2~0.offset .cse22))) (.cse10 (select .cse20 .cse5)) (.cse3 (+ c_~get1~0.offset .cse21)) (.cse7 (select .cse20 c_~get2~0.offset))) (and (< c_thread2Thread1of1ForFork1_~i~1 c_~n2~0) (< 0 c_~n1~0) (forall ((~get1~0.base Int) (v_ArrVal_1770 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1770))) (let ((.cse2 (select .cse6 ~get1~0.base)) (.cse4 (select .cse6 c_~get2~0.base))) (let ((.cse0 (select .cse4 c_~get2~0.offset)) (.cse1 (select .cse2 c_~get1~0.offset))) (or (= .cse0 .cse1) (< (select .cse2 .cse3) (select .cse4 .cse5)) (< .cse0 .cse1)))))) (< 0 c_~n2~0) (forall ((~get1~0.base Int)) (let ((.cse9 (select |c_#memory_int| ~get1~0.base))) (let ((.cse8 (select .cse9 c_~get1~0.offset))) (or (< .cse7 .cse8) (= .cse8 .cse7) (< (select .cse9 .cse3) .cse10))))) (forall ((~get1~0.base Int)) (let ((.cse13 (select |c_#memory_int| ~get1~0.base))) (let ((.cse12 (select .cse13 .cse14))) (or (< .cse11 .cse12) (= .cse11 .cse12) (< (select .cse13 .cse3) .cse10))))) (forall ((~get1~0.base Int) (v_ArrVal_1770 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1770))) (let ((.cse16 (select .cse17 ~get1~0.base)) (.cse15 (select .cse17 c_~get2~0.base))) (or (<= (select .cse15 .cse5) (select .cse16 .cse3)) (<= (select .cse16 c_~get1~0.offset) (select .cse15 c_~get2~0.offset)))))) (< c_thread2Thread1of1ForFork1_~i~1 c_~n1~0) (forall ((~get1~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~get1~0.base))) (or (<= .cse10 (select .cse18 .cse3)) (<= (select .cse18 .cse14) .cse11)))) (forall ((~get1~0.base Int)) (let ((.cse19 (select |c_#memory_int| ~get1~0.base))) (or (<= .cse10 (select .cse19 .cse3)) (<= (select .cse19 c_~get1~0.offset) .cse7)))))))) is different from false [2023-09-01 12:18:37,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:38,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:43,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:45,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:18:47,108 INFO L130 PetriNetUnfolder]: 5797/9908 cut-off events. [2023-09-01 12:18:47,108 INFO L131 PetriNetUnfolder]: For 192685/192685 co-relation queries the response was YES. [2023-09-01 12:18:47,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86872 conditions, 9908 events. 5797/9908 cut-off events. For 192685/192685 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 70584 event pairs, 1357 based on Foata normal form. 6/9914 useless extension candidates. Maximal degree in co-relation 86686. Up to 5568 conditions per place. [2023-09-01 12:18:47,217 INFO L137 encePairwiseOnDemand]: 417/435 looper letters, 494 selfloop transitions, 125 changer transitions 24/643 dead transitions. [2023-09-01 12:18:47,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 643 transitions, 14556 flow [2023-09-01 12:18:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:18:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:18:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1988 transitions. [2023-09-01 12:18:47,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3046743295019157 [2023-09-01 12:18:47,220 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1988 transitions. [2023-09-01 12:18:47,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1988 transitions. [2023-09-01 12:18:47,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:47,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1988 transitions. [2023-09-01 12:18:47,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 132.53333333333333) internal successors, (1988), 15 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:47,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:47,225 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:47,225 INFO L175 Difference]: Start difference. First operand has 235 places, 411 transitions, 8843 flow. Second operand 15 states and 1988 transitions. [2023-09-01 12:18:47,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 643 transitions, 14556 flow [2023-09-01 12:18:48,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 643 transitions, 14147 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-09-01 12:18:48,524 INFO L231 Difference]: Finished difference. Result has 244 places, 444 transitions, 9834 flow [2023-09-01 12:18:48,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8502, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9834, PETRI_PLACES=244, PETRI_TRANSITIONS=444} [2023-09-01 12:18:48,524 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 219 predicate places. [2023-09-01 12:18:48,524 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 444 transitions, 9834 flow [2023-09-01 12:18:48,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:48,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:48,525 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] [2023-09-01 12:18:48,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:48,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:48,730 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:48,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -670017954, now seen corresponding path program 18 times [2023-09-01 12:18:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058009251] [2023-09-01 12:18:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:49,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058009251] [2023-09-01 12:18:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058009251] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262995255] [2023-09-01 12:18:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:18:49,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:49,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:49,489 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:49,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 12:18:49,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:18:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 12:18:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:18:49,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:18:49,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:18:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:18:50,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:18:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262995255] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:18:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:18:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2023-09-01 12:18:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015251612] [2023-09-01 12:18:50,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:50,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:18:50,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:18:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:18:50,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:18:50,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 444 transitions, 9834 flow. Second operand has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:50,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:50,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:18:50,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:52,597 INFO L130 PetriNetUnfolder]: 5767/9845 cut-off events. [2023-09-01 12:18:52,597 INFO L131 PetriNetUnfolder]: For 190254/190254 co-relation queries the response was YES. [2023-09-01 12:18:52,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87609 conditions, 9845 events. 5767/9845 cut-off events. For 190254/190254 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 70060 event pairs, 1488 based on Foata normal form. 3/9848 useless extension candidates. Maximal degree in co-relation 87448. Up to 6746 conditions per place. [2023-09-01 12:18:52,706 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 337 selfloop transitions, 149 changer transitions 17/503 dead transitions. [2023-09-01 12:18:52,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 503 transitions, 11892 flow [2023-09-01 12:18:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:18:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:18:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1671 transitions. [2023-09-01 12:18:52,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38413793103448274 [2023-09-01 12:18:52,708 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1671 transitions. [2023-09-01 12:18:52,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1671 transitions. [2023-09-01 12:18:52,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1671 transitions. [2023-09-01 12:18:52,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.1) internal successors, (1671), 10 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:52,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:52,711 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:52,712 INFO L175 Difference]: Start difference. First operand has 244 places, 444 transitions, 9834 flow. Second operand 10 states and 1671 transitions. [2023-09-01 12:18:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 503 transitions, 11892 flow [2023-09-01 12:18:54,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 503 transitions, 11780 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-09-01 12:18:54,021 INFO L231 Difference]: Finished difference. Result has 247 places, 455 transitions, 10379 flow [2023-09-01 12:18:54,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9728, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10379, PETRI_PLACES=247, PETRI_TRANSITIONS=455} [2023-09-01 12:18:54,022 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 222 predicate places. [2023-09-01 12:18:54,022 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 455 transitions, 10379 flow [2023-09-01 12:18:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:54,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:54,022 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] [2023-09-01 12:18:54,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:54,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:54,227 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:54,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash -886959782, now seen corresponding path program 19 times [2023-09-01 12:18:54,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:54,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567430148] [2023-09-01 12:18:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:54,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567430148] [2023-09-01 12:18:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567430148] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623325431] [2023-09-01 12:18:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:18:54,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:54,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:54,848 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:54,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 12:18:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:18:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:18:55,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:55,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:18:55,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:55,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-09-01 12:18:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:55,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:18:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:55,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623325431] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:55,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:18:55,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 30 [2023-09-01 12:18:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782650510] [2023-09-01 12:18:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:18:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:18:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:18:56,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 435 [2023-09-01 12:18:56,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 455 transitions, 10379 flow. Second operand has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:56,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:56,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 435 [2023-09-01 12:18:56,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:59,055 INFO L130 PetriNetUnfolder]: 5750/9798 cut-off events. [2023-09-01 12:18:59,055 INFO L131 PetriNetUnfolder]: For 196351/196351 co-relation queries the response was YES. [2023-09-01 12:18:59,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87927 conditions, 9798 events. 5750/9798 cut-off events. For 196351/196351 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 69358 event pairs, 1162 based on Foata normal form. 3/9801 useless extension candidates. Maximal degree in co-relation 87668. Up to 6957 conditions per place. [2023-09-01 12:18:59,198 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 265 selfloop transitions, 186 changer transitions 29/480 dead transitions. [2023-09-01 12:18:59,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 480 transitions, 11561 flow [2023-09-01 12:18:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:18:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:18:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1793 transitions. [2023-09-01 12:18:59,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37471264367816093 [2023-09-01 12:18:59,200 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1793 transitions. [2023-09-01 12:18:59,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1793 transitions. [2023-09-01 12:18:59,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:59,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1793 transitions. [2023-09-01 12:18:59,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.0) internal successors, (1793), 11 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:59,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:59,203 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:59,204 INFO L175 Difference]: Start difference. First operand has 247 places, 455 transitions, 10379 flow. Second operand 11 states and 1793 transitions. [2023-09-01 12:18:59,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 480 transitions, 11561 flow [2023-09-01 12:19:00,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 480 transitions, 11502 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-09-01 12:19:00,650 INFO L231 Difference]: Finished difference. Result has 251 places, 433 transitions, 10267 flow [2023-09-01 12:19:00,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=10322, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10267, PETRI_PLACES=251, PETRI_TRANSITIONS=433} [2023-09-01 12:19:00,651 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 226 predicate places. [2023-09-01 12:19:00,651 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 433 transitions, 10267 flow [2023-09-01 12:19:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 159.8181818181818) internal successors, (1758), 11 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:00,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:00,651 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] [2023-09-01 12:19:00,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-09-01 12:19:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 12:19:00,856 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:00,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1394411216, now seen corresponding path program 20 times [2023-09-01 12:19:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211140052] [2023-09-01 12:19:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:01,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211140052] [2023-09-01 12:19:01,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211140052] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304918698] [2023-09-01 12:19:01,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:19:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:01,447 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:01,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 12:19:01,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:19:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 12:19:01,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:01,824 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:19:01,824 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 79 treesize of output 43 [2023-09-01 12:19:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:19:01,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:19:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304918698] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:19:01,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:19:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-09-01 12:19:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085857075] [2023-09-01 12:19:01,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:01,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:19:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:19:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:19:02,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:19:02,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 433 transitions, 10267 flow. Second operand has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:02,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:02,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:19:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:04,074 INFO L130 PetriNetUnfolder]: 5713/9710 cut-off events. [2023-09-01 12:19:04,074 INFO L131 PetriNetUnfolder]: For 208245/208245 co-relation queries the response was YES. [2023-09-01 12:19:04,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88832 conditions, 9710 events. 5713/9710 cut-off events. For 208245/208245 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 68456 event pairs, 1548 based on Foata normal form. 3/9713 useless extension candidates. Maximal degree in co-relation 88527. Up to 6750 conditions per place. [2023-09-01 12:19:04,216 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 320 selfloop transitions, 136 changer transitions 5/461 dead transitions. [2023-09-01 12:19:04,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 461 transitions, 11452 flow [2023-09-01 12:19:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:19:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:19:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1535 transitions. [2023-09-01 12:19:04,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39208173690932313 [2023-09-01 12:19:04,218 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1535 transitions. [2023-09-01 12:19:04,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1535 transitions. [2023-09-01 12:19:04,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:04,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1535 transitions. [2023-09-01 12:19:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.55555555555554) internal successors, (1535), 9 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:04,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:04,222 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:04,222 INFO L175 Difference]: Start difference. First operand has 251 places, 433 transitions, 10267 flow. Second operand 9 states and 1535 transitions. [2023-09-01 12:19:04,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 461 transitions, 11452 flow [2023-09-01 12:19:05,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 461 transitions, 11064 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-09-01 12:19:05,637 INFO L231 Difference]: Finished difference. Result has 240 places, 433 transitions, 10164 flow [2023-09-01 12:19:05,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9885, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10164, PETRI_PLACES=240, PETRI_TRANSITIONS=433} [2023-09-01 12:19:05,638 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2023-09-01 12:19:05,638 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 433 transitions, 10164 flow [2023-09-01 12:19:05,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 164.8181818181818) internal successors, (1813), 11 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:05,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:05,639 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] [2023-09-01 12:19:05,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-09-01 12:19:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:05,841 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:05,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1828364272, now seen corresponding path program 21 times [2023-09-01 12:19:05,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:05,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221913689] [2023-09-01 12:19:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221913689] [2023-09-01 12:19:06,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221913689] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578573188] [2023-09-01 12:19:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:19:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:06,691 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:06,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 12:19:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:19:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:19:06,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:19:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:19:07,106 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:19:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2023-09-01 12:19:07,275 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:19:07,276 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 79 treesize of output 43 [2023-09-01 12:19:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:19:07,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:19:07,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578573188] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:19:07,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:19:07,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2023-09-01 12:19:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688016456] [2023-09-01 12:19:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:07,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:19:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:19:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:19:07,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:19:07,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 433 transitions, 10164 flow. Second operand has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:07,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:07,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:19:07,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:09,879 INFO L130 PetriNetUnfolder]: 5722/9731 cut-off events. [2023-09-01 12:19:09,879 INFO L131 PetriNetUnfolder]: For 202795/202795 co-relation queries the response was YES. [2023-09-01 12:19:09,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88198 conditions, 9731 events. 5722/9731 cut-off events. For 202795/202795 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 68795 event pairs, 1461 based on Foata normal form. 3/9734 useless extension candidates. Maximal degree in co-relation 87753. Up to 6750 conditions per place. [2023-09-01 12:19:09,981 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 338 selfloop transitions, 136 changer transitions 5/479 dead transitions. [2023-09-01 12:19:09,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 479 transitions, 11801 flow [2023-09-01 12:19:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:19:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:19:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1515 transitions. [2023-09-01 12:19:09,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2023-09-01 12:19:09,983 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1515 transitions. [2023-09-01 12:19:09,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1515 transitions. [2023-09-01 12:19:09,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:09,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1515 transitions. [2023-09-01 12:19:09,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.33333333333334) internal successors, (1515), 9 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:09,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:09,986 INFO L175 Difference]: Start difference. First operand has 240 places, 433 transitions, 10164 flow. Second operand 9 states and 1515 transitions. [2023-09-01 12:19:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 479 transitions, 11801 flow [2023-09-01 12:19:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 479 transitions, 11529 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-09-01 12:19:11,090 INFO L231 Difference]: Finished difference. Result has 243 places, 435 transitions, 10347 flow [2023-09-01 12:19:11,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9900, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10347, PETRI_PLACES=243, PETRI_TRANSITIONS=435} [2023-09-01 12:19:11,091 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 218 predicate places. [2023-09-01 12:19:11,091 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 435 transitions, 10347 flow [2023-09-01 12:19:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:11,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:11,092 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] [2023-09-01 12:19:11,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:11,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 12:19:11,297 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:11,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:11,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1195531194, now seen corresponding path program 22 times [2023-09-01 12:19:11,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:11,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066924394] [2023-09-01 12:19:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:11,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066924394] [2023-09-01 12:19:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066924394] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925336621] [2023-09-01 12:19:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:19:11,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:11,813 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:11,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 12:19:11,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:19:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:19:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:19:12,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:19:12,241 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:19:12,242 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 79 treesize of output 43 [2023-09-01 12:19:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:19:12,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:19:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925336621] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:19:12,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:19:12,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2023-09-01 12:19:12,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430106413] [2023-09-01 12:19:12,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:12,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:19:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:19:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:19:12,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:19:12,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 435 transitions, 10347 flow. Second operand has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:12,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:12,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:19:12,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:14,885 INFO L130 PetriNetUnfolder]: 5713/9704 cut-off events. [2023-09-01 12:19:14,886 INFO L131 PetriNetUnfolder]: For 204836/204836 co-relation queries the response was YES. [2023-09-01 12:19:14,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88132 conditions, 9704 events. 5713/9704 cut-off events. For 204836/204836 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 68481 event pairs, 1473 based on Foata normal form. 3/9707 useless extension candidates. Maximal degree in co-relation 87700. Up to 6746 conditions per place. [2023-09-01 12:19:14,977 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 321 selfloop transitions, 148 changer transitions 5/474 dead transitions. [2023-09-01 12:19:14,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 474 transitions, 11840 flow [2023-09-01 12:19:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:19:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:19:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1673 transitions. [2023-09-01 12:19:14,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38459770114942526 [2023-09-01 12:19:14,980 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1673 transitions. [2023-09-01 12:19:14,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1673 transitions. [2023-09-01 12:19:14,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:14,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1673 transitions. [2023-09-01 12:19:14,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.3) internal successors, (1673), 10 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,983 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,983 INFO L175 Difference]: Start difference. First operand has 243 places, 435 transitions, 10347 flow. Second operand 10 states and 1673 transitions. [2023-09-01 12:19:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 474 transitions, 11840 flow [2023-09-01 12:19:16,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 474 transitions, 11523 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 12:19:16,019 INFO L231 Difference]: Finished difference. Result has 246 places, 435 transitions, 10367 flow [2023-09-01 12:19:16,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=10032, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10367, PETRI_PLACES=246, PETRI_TRANSITIONS=435} [2023-09-01 12:19:16,019 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2023-09-01 12:19:16,019 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 435 transitions, 10367 flow [2023-09-01 12:19:16,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.66666666666666) internal successors, (1952), 12 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:16,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:16,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:16,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:16,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:16,225 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:16,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash -276521586, now seen corresponding path program 2 times [2023-09-01 12:19:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:16,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873352343] [2023-09-01 12:19:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873352343] [2023-09-01 12:19:16,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873352343] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730085291] [2023-09-01 12:19:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:19:16,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:16,431 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:16,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 12:19:16,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:19:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:19:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:16,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:16,946 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 112 treesize of output 77 [2023-09-01 12:19:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:16,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:19:17,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:17,039 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 [2023-09-01 12:19:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730085291] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:19:17,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:19:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:19:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829871767] [2023-09-01 12:19:17,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:19:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:19:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:19:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:19:19,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:19:19,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 435 transitions, 10367 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:19,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:19,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:19:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:24,646 INFO L130 PetriNetUnfolder]: 8332/14624 cut-off events. [2023-09-01 12:19:24,646 INFO L131 PetriNetUnfolder]: For 297907/297907 co-relation queries the response was YES. [2023-09-01 12:19:24,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130198 conditions, 14624 events. 8332/14624 cut-off events. For 297907/297907 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 115223 event pairs, 1013 based on Foata normal form. 296/14920 useless extension candidates. Maximal degree in co-relation 129480. Up to 4184 conditions per place. [2023-09-01 12:19:24,801 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1101 selfloop transitions, 456 changer transitions 28/1585 dead transitions. [2023-09-01 12:19:24,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1585 transitions, 36428 flow [2023-09-01 12:19:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 12:19:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 12:19:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 7215 transitions. [2023-09-01 12:19:24,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38572574178027264 [2023-09-01 12:19:24,812 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 7215 transitions. [2023-09-01 12:19:24,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 7215 transitions. [2023-09-01 12:19:24,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:24,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 7215 transitions. [2023-09-01 12:19:24,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 167.7906976744186) internal successors, (7215), 43 states have internal predecessors, (7215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:24,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 435.0) internal successors, (19140), 44 states have internal predecessors, (19140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:24,823 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 435.0) internal successors, (19140), 44 states have internal predecessors, (19140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:24,823 INFO L175 Difference]: Start difference. First operand has 246 places, 435 transitions, 10367 flow. Second operand 43 states and 7215 transitions. [2023-09-01 12:19:24,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1585 transitions, 36428 flow [2023-09-01 12:19:26,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1585 transitions, 34648 flow, removed 90 selfloop flow, removed 12 redundant places. [2023-09-01 12:19:26,959 INFO L231 Difference]: Finished difference. Result has 288 places, 681 transitions, 17471 flow [2023-09-01 12:19:26,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9792, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=17471, PETRI_PLACES=288, PETRI_TRANSITIONS=681} [2023-09-01 12:19:26,959 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 263 predicate places. [2023-09-01 12:19:26,959 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 681 transitions, 17471 flow [2023-09-01 12:19:26,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:26,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:26,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:26,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:27,166 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:27,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1712007179, now seen corresponding path program 3 times [2023-09-01 12:19:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804849988] [2023-09-01 12:19:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:27,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:27,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:27,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804849988] [2023-09-01 12:19:27,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804849988] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:27,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608209581] [2023-09-01 12:19:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:19:27,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:27,409 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:27,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 12:19:27,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:19:27,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:27,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:19:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:27,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:19:27,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:19:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608209581] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:19:28,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:19:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:19:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400787435] [2023-09-01 12:19:28,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:19:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:19:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:19:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:19:29,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:19:29,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 681 transitions, 17471 flow. Second operand has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:29,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:29,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:19:29,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:35,533 INFO L130 PetriNetUnfolder]: 9470/16979 cut-off events. [2023-09-01 12:19:35,534 INFO L131 PetriNetUnfolder]: For 440069/440069 co-relation queries the response was YES. [2023-09-01 12:19:35,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160065 conditions, 16979 events. 9470/16979 cut-off events. For 440069/440069 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 140009 event pairs, 1127 based on Foata normal form. 431/17410 useless extension candidates. Maximal degree in co-relation 158972. Up to 4840 conditions per place. [2023-09-01 12:19:35,714 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 892 selfloop transitions, 426 changer transitions 19/1337 dead transitions. [2023-09-01 12:19:35,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1337 transitions, 32892 flow [2023-09-01 12:19:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:19:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:19:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4386 transitions. [2023-09-01 12:19:35,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877984084880637 [2023-09-01 12:19:35,717 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4386 transitions. [2023-09-01 12:19:35,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4386 transitions. [2023-09-01 12:19:35,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:35,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4386 transitions. [2023-09-01 12:19:35,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 168.69230769230768) internal successors, (4386), 26 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:35,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:35,725 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:35,725 INFO L175 Difference]: Start difference. First operand has 288 places, 681 transitions, 17471 flow. Second operand 26 states and 4386 transitions. [2023-09-01 12:19:35,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1337 transitions, 32892 flow [2023-09-01 12:19:40,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1337 transitions, 31712 flow, removed 268 selfloop flow, removed 17 redundant places. [2023-09-01 12:19:40,531 INFO L231 Difference]: Finished difference. Result has 303 places, 831 transitions, 21907 flow [2023-09-01 12:19:40,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=16479, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=21907, PETRI_PLACES=303, PETRI_TRANSITIONS=831} [2023-09-01 12:19:40,532 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2023-09-01 12:19:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 831 transitions, 21907 flow [2023-09-01 12:19:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:40,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:40,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:40,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 12:19:40,738 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:40,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1775756754, now seen corresponding path program 4 times [2023-09-01 12:19:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112921319] [2023-09-01 12:19:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:19:40,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:40,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112921319] [2023-09-01 12:19:40,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112921319] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:40,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177488496] [2023-09-01 12:19:40,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:19:40,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:40,947 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:40,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 12:19:41,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:19:41,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:19:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:41,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:41,444 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 112 treesize of output 77 [2023-09-01 12:19:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:19:41,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:19:41,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:41,554 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 [2023-09-01 12:19:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:19:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177488496] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:19:42,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:19:42,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:19:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414017645] [2023-09-01 12:19:42,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:19:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:19:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:19:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:19:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:19:43,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 831 transitions, 21907 flow. Second operand has 35 states, 35 states have (on average 163.8) internal successors, (5733), 35 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:43,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:43,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:19:43,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:50,578 INFO L130 PetriNetUnfolder]: 9531/17153 cut-off events. [2023-09-01 12:19:50,578 INFO L131 PetriNetUnfolder]: For 450954/450954 co-relation queries the response was YES. [2023-09-01 12:19:50,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163929 conditions, 17153 events. 9531/17153 cut-off events. For 450954/450954 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 142023 event pairs, 1544 based on Foata normal form. 8/17161 useless extension candidates. Maximal degree in co-relation 163637. Up to 4871 conditions per place. [2023-09-01 12:19:50,772 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1482 selfloop transitions, 294 changer transitions 50/1826 dead transitions. [2023-09-01 12:19:50,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1826 transitions, 45100 flow [2023-09-01 12:19:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 12:19:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 12:19:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 6577 transitions. [2023-09-01 12:19:50,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876805187150015 [2023-09-01 12:19:50,776 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 6577 transitions. [2023-09-01 12:19:50,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 6577 transitions. [2023-09-01 12:19:50,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:50,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 6577 transitions. [2023-09-01 12:19:50,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 168.64102564102564) internal successors, (6577), 39 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:50,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 435.0) internal successors, (17400), 40 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:50,787 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 435.0) internal successors, (17400), 40 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:50,787 INFO L175 Difference]: Start difference. First operand has 303 places, 831 transitions, 21907 flow. Second operand 39 states and 6577 transitions. [2023-09-01 12:19:50,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1826 transitions, 45100 flow [2023-09-01 12:19:57,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1826 transitions, 43670 flow, removed 602 selfloop flow, removed 14 redundant places. [2023-09-01 12:19:57,087 INFO L231 Difference]: Finished difference. Result has 334 places, 829 transitions, 21648 flow [2023-09-01 12:19:57,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=21069, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=21648, PETRI_PLACES=334, PETRI_TRANSITIONS=829} [2023-09-01 12:19:57,088 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 309 predicate places. [2023-09-01 12:19:57,088 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 829 transitions, 21648 flow [2023-09-01 12:19:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 163.8) internal successors, (5733), 35 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:57,089 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] [2023-09-01 12:19:57,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:57,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-09-01 12:19:57,291 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:19:57,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1573926615, now seen corresponding path program 1 times [2023-09-01 12:19:57,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:57,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643259262] [2023-09-01 12:19:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:57,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:19:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:57,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643259262] [2023-09-01 12:19:57,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643259262] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:19:57,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:19:57,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:19:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618936276] [2023-09-01 12:19:57,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:57,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:19:57,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:19:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:19:57,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:19:57,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 829 transitions, 21648 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:57,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:57,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:19:57,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:02,659 INFO L130 PetriNetUnfolder]: 9435/16995 cut-off events. [2023-09-01 12:20:02,659 INFO L131 PetriNetUnfolder]: For 434055/434055 co-relation queries the response was YES. [2023-09-01 12:20:02,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161370 conditions, 16995 events. 9435/16995 cut-off events. For 434055/434055 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 140801 event pairs, 2634 based on Foata normal form. 122/17117 useless extension candidates. Maximal degree in co-relation 160517. Up to 12100 conditions per place. [2023-09-01 12:20:02,854 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 637 selfloop transitions, 260 changer transitions 0/897 dead transitions. [2023-09-01 12:20:02,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 897 transitions, 24759 flow [2023-09-01 12:20:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:20:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:20:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1310 transitions. [2023-09-01 12:20:02,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302134646962233 [2023-09-01 12:20:02,856 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1310 transitions. [2023-09-01 12:20:02,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1310 transitions. [2023-09-01 12:20:02,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:02,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1310 transitions. [2023-09-01 12:20:02,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.14285714285714) internal successors, (1310), 7 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:02,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:02,859 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:02,859 INFO L175 Difference]: Start difference. First operand has 334 places, 829 transitions, 21648 flow. Second operand 7 states and 1310 transitions. [2023-09-01 12:20:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 897 transitions, 24759 flow [2023-09-01 12:20:08,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 897 transitions, 24272 flow, removed 38 selfloop flow, removed 29 redundant places. [2023-09-01 12:20:08,853 INFO L231 Difference]: Finished difference. Result has 306 places, 837 transitions, 22107 flow [2023-09-01 12:20:08,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=21197, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22107, PETRI_PLACES=306, PETRI_TRANSITIONS=837} [2023-09-01 12:20:08,854 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2023-09-01 12:20:08,854 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 837 transitions, 22107 flow [2023-09-01 12:20:08,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:08,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-09-01 12:20:08,855 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:20:08,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 563704617, now seen corresponding path program 5 times [2023-09-01 12:20:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749152373] [2023-09-01 12:20:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:20:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749152373] [2023-09-01 12:20:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749152373] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299156792] [2023-09-01 12:20:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:20:09,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:09,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:09,088 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:09,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 12:20:09,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:20:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:20:09,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:20:09,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:09,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:09,531 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 112 treesize of output 77 [2023-09-01 12:20:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:20:09,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:20:09,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:09,643 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 [2023-09-01 12:20:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:20:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299156792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:20:10,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:20:10,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:20:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238915451] [2023-09-01 12:20:10,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:20:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:20:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:20:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:20:11,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:20:11,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 837 transitions, 22107 flow. Second operand has 32 states, 32 states have (on average 163.96875) internal successors, (5247), 32 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:11,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:11,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:20:11,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:16,855 INFO L130 PetriNetUnfolder]: 9465/17101 cut-off events. [2023-09-01 12:20:16,856 INFO L131 PetriNetUnfolder]: For 441337/441337 co-relation queries the response was YES. [2023-09-01 12:20:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162938 conditions, 17101 events. 9465/17101 cut-off events. For 441337/441337 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 142741 event pairs, 1382 based on Foata normal form. 8/17109 useless extension candidates. Maximal degree in co-relation 161363. Up to 4841 conditions per place. [2023-09-01 12:20:17,053 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 971 selfloop transitions, 279 changer transitions 22/1272 dead transitions. [2023-09-01 12:20:17,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1272 transitions, 33352 flow [2023-09-01 12:20:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:20:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:20:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3546 transitions. [2023-09-01 12:20:17,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38817733990147785 [2023-09-01 12:20:17,147 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3546 transitions. [2023-09-01 12:20:17,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3546 transitions. [2023-09-01 12:20:17,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:17,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3546 transitions. [2023-09-01 12:20:17,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 168.85714285714286) internal successors, (3546), 21 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:17,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 435.0) internal successors, (9570), 22 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:17,153 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 435.0) internal successors, (9570), 22 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:17,153 INFO L175 Difference]: Start difference. First operand has 306 places, 837 transitions, 22107 flow. Second operand 21 states and 3546 transitions. [2023-09-01 12:20:17,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1272 transitions, 33352 flow [2023-09-01 12:20:22,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1272 transitions, 32826 flow, removed 54 selfloop flow, removed 4 redundant places. [2023-09-01 12:20:22,339 INFO L231 Difference]: Finished difference. Result has 327 places, 835 transitions, 22358 flow [2023-09-01 12:20:22,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=21811, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=22358, PETRI_PLACES=327, PETRI_TRANSITIONS=835} [2023-09-01 12:20:22,340 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2023-09-01 12:20:22,340 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 835 transitions, 22358 flow [2023-09-01 12:20:22,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 163.96875) internal successors, (5247), 32 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:22,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:22,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:22,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 12:20:22,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-09-01 12:20:22,545 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:20:22,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash -125062612, now seen corresponding path program 6 times [2023-09-01 12:20:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:22,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452092392] [2023-09-01 12:20:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:22,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452092392] [2023-09-01 12:20:22,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452092392] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45223724] [2023-09-01 12:20:22,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:20:22,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:22,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:22,750 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:22,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 12:20:22,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:20:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:20:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:20:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:23,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:23,171 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 108 treesize of output 73 [2023-09-01 12:20:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:23,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:20:23,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:23,380 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 [2023-09-01 12:20:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45223724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:20:24,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:20:24,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:20:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726316462] [2023-09-01 12:20:24,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:20:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:20:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:20:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:20:25,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:20:25,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 835 transitions, 22358 flow. Second operand has 35 states, 35 states have (on average 163.8) internal successors, (5733), 35 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:25,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:25,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:20:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:31,461 INFO L130 PetriNetUnfolder]: 9393/16920 cut-off events. [2023-09-01 12:20:31,461 INFO L131 PetriNetUnfolder]: For 459264/459264 co-relation queries the response was YES. [2023-09-01 12:20:31,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163732 conditions, 16920 events. 9393/16920 cut-off events. For 459264/459264 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 140486 event pairs, 1288 based on Foata normal form. 5/16925 useless extension candidates. Maximal degree in co-relation 163148. Up to 5914 conditions per place. [2023-09-01 12:20:31,658 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 926 selfloop transitions, 494 changer transitions 9/1429 dead transitions. [2023-09-01 12:20:31,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1429 transitions, 36119 flow [2023-09-01 12:20:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 12:20:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 12:20:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5063 transitions. [2023-09-01 12:20:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38796934865900384 [2023-09-01 12:20:31,662 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5063 transitions. [2023-09-01 12:20:31,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5063 transitions. [2023-09-01 12:20:31,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:31,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5063 transitions. [2023-09-01 12:20:31,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 168.76666666666668) internal successors, (5063), 30 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:31,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:31,670 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:31,670 INFO L175 Difference]: Start difference. First operand has 327 places, 835 transitions, 22358 flow. Second operand 30 states and 5063 transitions. [2023-09-01 12:20:31,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1429 transitions, 36119 flow [2023-09-01 12:20:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1429 transitions, 35596 flow, removed 34 selfloop flow, removed 17 redundant places. [2023-09-01 12:20:36,877 INFO L231 Difference]: Finished difference. Result has 338 places, 835 transitions, 22884 flow [2023-09-01 12:20:36,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=21882, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=22884, PETRI_PLACES=338, PETRI_TRANSITIONS=835} [2023-09-01 12:20:36,877 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 313 predicate places. [2023-09-01 12:20:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 835 transitions, 22884 flow [2023-09-01 12:20:36,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 163.8) internal successors, (5733), 35 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:36,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:36,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:36,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 12:20:37,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:37,086 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:20:37,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1224613424, now seen corresponding path program 7 times [2023-09-01 12:20:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664082056] [2023-09-01 12:20:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:37,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:37,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664082056] [2023-09-01 12:20:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664082056] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909083393] [2023-09-01 12:20:37,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:20:37,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:37,312 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:37,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 12:20:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:20:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:37,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:37,842 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 112 treesize of output 77 [2023-09-01 12:20:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:37,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:20:37,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:37,969 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 [2023-09-01 12:20:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909083393] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:20:38,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:20:38,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:20:38,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094499354] [2023-09-01 12:20:38,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:20:38,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:20:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:20:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:20:39,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:20:39,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 835 transitions, 22884 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:39,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:39,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:20:39,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:47,177 INFO L130 PetriNetUnfolder]: 9379/16901 cut-off events. [2023-09-01 12:20:47,177 INFO L131 PetriNetUnfolder]: For 457846/457846 co-relation queries the response was YES. [2023-09-01 12:20:47,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166009 conditions, 16901 events. 9379/16901 cut-off events. For 457846/457846 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 139897 event pairs, 1320 based on Foata normal form. 10/16911 useless extension candidates. Maximal degree in co-relation 165441. Up to 4817 conditions per place. [2023-09-01 12:20:47,374 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1316 selfloop transitions, 440 changer transitions 53/1809 dead transitions. [2023-09-01 12:20:47,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1809 transitions, 46521 flow [2023-09-01 12:20:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 12:20:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 12:20:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6693 transitions. [2023-09-01 12:20:47,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3846551724137931 [2023-09-01 12:20:47,378 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6693 transitions. [2023-09-01 12:20:47,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6693 transitions. [2023-09-01 12:20:47,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:47,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6693 transitions. [2023-09-01 12:20:47,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 167.325) internal successors, (6693), 40 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:47,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:47,388 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:47,388 INFO L175 Difference]: Start difference. First operand has 338 places, 835 transitions, 22884 flow. Second operand 40 states and 6693 transitions. [2023-09-01 12:20:47,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1809 transitions, 46521 flow [2023-09-01 12:20:52,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1809 transitions, 45684 flow, removed 12 selfloop flow, removed 25 redundant places. [2023-09-01 12:20:52,677 INFO L231 Difference]: Finished difference. Result has 352 places, 816 transitions, 22506 flow [2023-09-01 12:20:52,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=22077, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=22506, PETRI_PLACES=352, PETRI_TRANSITIONS=816} [2023-09-01 12:20:52,678 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 327 predicate places. [2023-09-01 12:20:52,678 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 816 transitions, 22506 flow [2023-09-01 12:20:52,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:52,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:52,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:52,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-09-01 12:20:52,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-09-01 12:20:52,884 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:20:52,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1729635931, now seen corresponding path program 8 times [2023-09-01 12:20:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217606395] [2023-09-01 12:20:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217606395] [2023-09-01 12:20:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217606395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286896212] [2023-09-01 12:20:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:20:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:53,071 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:53,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 12:20:53,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:20:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:20:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:20:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:20:53,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:53,753 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 [2023-09-01 12:20:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286896212] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:20:54,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:20:54,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:20:54,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139701580] [2023-09-01 12:20:54,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:20:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:20:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:20:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:20:55,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 435 [2023-09-01 12:20:55,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 816 transitions, 22506 flow. Second operand has 32 states, 32 states have (on average 163.96875) internal successors, (5247), 32 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:55,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:55,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 435 [2023-09-01 12:20:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:01,766 INFO L130 PetriNetUnfolder]: 9203/16515 cut-off events. [2023-09-01 12:21:01,766 INFO L131 PetriNetUnfolder]: For 456219/456219 co-relation queries the response was YES. [2023-09-01 12:21:01,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163740 conditions, 16515 events. 9203/16515 cut-off events. For 456219/456219 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 135427 event pairs, 1076 based on Foata normal form. 10/16525 useless extension candidates. Maximal degree in co-relation 163059. Up to 4771 conditions per place. [2023-09-01 12:21:02,056 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 885 selfloop transitions, 414 changer transitions 9/1308 dead transitions. [2023-09-01 12:21:02,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1308 transitions, 34061 flow [2023-09-01 12:21:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:21:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:21:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4398 transitions. [2023-09-01 12:21:02,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38885941644562333 [2023-09-01 12:21:02,060 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4398 transitions. [2023-09-01 12:21:02,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4398 transitions. [2023-09-01 12:21:02,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:02,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4398 transitions. [2023-09-01 12:21:02,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 169.15384615384616) internal successors, (4398), 26 states have internal predecessors, (4398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:02,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:02,068 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:02,068 INFO L175 Difference]: Start difference. First operand has 352 places, 816 transitions, 22506 flow. Second operand 26 states and 4398 transitions. [2023-09-01 12:21:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1308 transitions, 34061 flow [2023-09-01 12:21:07,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1308 transitions, 33344 flow, removed 30 selfloop flow, removed 34 redundant places. [2023-09-01 12:21:07,443 INFO L231 Difference]: Finished difference. Result has 336 places, 815 transitions, 22641 flow [2023-09-01 12:21:07,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=21817, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=22641, PETRI_PLACES=336, PETRI_TRANSITIONS=815} [2023-09-01 12:21:07,443 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 311 predicate places. [2023-09-01 12:21:07,444 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 815 transitions, 22641 flow [2023-09-01 12:21:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 163.96875) internal successors, (5247), 32 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:07,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:07,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:07,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-09-01 12:21:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:07,649 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:07,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash -730892501, now seen corresponding path program 9 times [2023-09-01 12:21:07,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:07,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360532769] [2023-09-01 12:21:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:21:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360532769] [2023-09-01 12:21:07,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360532769] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248991627] [2023-09-01 12:21:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:21:07,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:07,857 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:21:07,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 12:21:08,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:21:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:08,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:21:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:08,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:08,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:21:08,359 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 [2023-09-01 12:21:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:08,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248991627] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:21:08,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:21:08,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:21:08,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003695846] [2023-09-01 12:21:08,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:21:08,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:21:08,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:08,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:21:08,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:21:10,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 435 [2023-09-01 12:21:10,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 815 transitions, 22641 flow. Second operand has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:10,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:10,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 435 [2023-09-01 12:21:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:17,009 INFO L130 PetriNetUnfolder]: 9834/17698 cut-off events. [2023-09-01 12:21:17,009 INFO L131 PetriNetUnfolder]: For 480555/480555 co-relation queries the response was YES. [2023-09-01 12:21:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176518 conditions, 17698 events. 9834/17698 cut-off events. For 480555/480555 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 147247 event pairs, 1053 based on Foata normal form. 90/17788 useless extension candidates. Maximal degree in co-relation 175969. Up to 5160 conditions per place. [2023-09-01 12:21:17,241 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 979 selfloop transitions, 555 changer transitions 53/1587 dead transitions. [2023-09-01 12:21:17,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1587 transitions, 40580 flow [2023-09-01 12:21:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 12:21:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 12:21:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6655 transitions. [2023-09-01 12:21:17,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824712643678161 [2023-09-01 12:21:17,246 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6655 transitions. [2023-09-01 12:21:17,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6655 transitions. [2023-09-01 12:21:17,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:17,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6655 transitions. [2023-09-01 12:21:17,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 166.375) internal successors, (6655), 40 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:17,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:17,258 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:17,258 INFO L175 Difference]: Start difference. First operand has 336 places, 815 transitions, 22641 flow. Second operand 40 states and 6655 transitions. [2023-09-01 12:21:17,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1587 transitions, 40580 flow [2023-09-01 12:21:23,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1587 transitions, 39987 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-09-01 12:21:23,273 INFO L231 Difference]: Finished difference. Result has 377 places, 982 transitions, 28785 flow [2023-09-01 12:21:23,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=22106, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=28785, PETRI_PLACES=377, PETRI_TRANSITIONS=982} [2023-09-01 12:21:23,274 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 352 predicate places. [2023-09-01 12:21:23,274 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 982 transitions, 28785 flow [2023-09-01 12:21:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:23,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:23,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:23,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:23,480 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:23,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1243425573, now seen corresponding path program 10 times [2023-09-01 12:21:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:23,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141226748] [2023-09-01 12:21:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:23,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141226748] [2023-09-01 12:21:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141226748] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339616777] [2023-09-01 12:21:23,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:21:23,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:23,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:23,710 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:21:23,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 12:21:23,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:21:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:21:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:24,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:24,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:21:24,244 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 [2023-09-01 12:21:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:24,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339616777] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:21:24,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:21:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:21:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935282108] [2023-09-01 12:21:24,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:21:24,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:21:24,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:21:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:21:26,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:21:26,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 982 transitions, 28785 flow. Second operand has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:26,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:26,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:21:26,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:34,548 INFO L130 PetriNetUnfolder]: 9915/17942 cut-off events. [2023-09-01 12:21:34,549 INFO L131 PetriNetUnfolder]: For 586189/586189 co-relation queries the response was YES. [2023-09-01 12:21:34,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192544 conditions, 17942 events. 9915/17942 cut-off events. For 586189/586189 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 150369 event pairs, 1166 based on Foata normal form. 243/18185 useless extension candidates. Maximal degree in co-relation 191811. Up to 5469 conditions per place. [2023-09-01 12:21:34,892 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1057 selfloop transitions, 497 changer transitions 33/1587 dead transitions. [2023-09-01 12:21:34,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1587 transitions, 43857 flow [2023-09-01 12:21:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:21:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:21:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5732 transitions. [2023-09-01 12:21:34,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875591615956728 [2023-09-01 12:21:34,895 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5732 transitions. [2023-09-01 12:21:34,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5732 transitions. [2023-09-01 12:21:34,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:34,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5732 transitions. [2023-09-01 12:21:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 168.58823529411765) internal successors, (5732), 34 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:34,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 435.0) internal successors, (15225), 35 states have internal predecessors, (15225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:34,905 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 435.0) internal successors, (15225), 35 states have internal predecessors, (15225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:34,905 INFO L175 Difference]: Start difference. First operand has 377 places, 982 transitions, 28785 flow. Second operand 34 states and 5732 transitions. [2023-09-01 12:21:34,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1587 transitions, 43857 flow [2023-09-01 12:21:43,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1587 transitions, 41533 flow, removed 517 selfloop flow, removed 30 redundant places. [2023-09-01 12:21:43,039 INFO L231 Difference]: Finished difference. Result has 389 places, 1088 transitions, 31113 flow [2023-09-01 12:21:43,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=26811, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=31113, PETRI_PLACES=389, PETRI_TRANSITIONS=1088} [2023-09-01 12:21:43,040 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 364 predicate places. [2023-09-01 12:21:43,040 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1088 transitions, 31113 flow [2023-09-01 12:21:43,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:43,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:43,041 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] [2023-09-01 12:21:43,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:43,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:43,246 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:43,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2017063911, now seen corresponding path program 2 times [2023-09-01 12:21:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198255760] [2023-09-01 12:21:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:21:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198255760] [2023-09-01 12:21:43,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198255760] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:43,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:43,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 12:21:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439090413] [2023-09-01 12:21:43,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:43,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:21:43,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:21:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:21:43,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:21:43,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1088 transitions, 31113 flow. Second operand has 10 states, 10 states have (on average 180.1) internal successors, (1801), 10 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:43,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:43,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:21:43,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:49,884 INFO L130 PetriNetUnfolder]: 9880/18161 cut-off events. [2023-09-01 12:21:49,885 INFO L131 PetriNetUnfolder]: For 619368/619368 co-relation queries the response was YES. [2023-09-01 12:21:50,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198406 conditions, 18161 events. 9880/18161 cut-off events. For 619368/619368 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 156351 event pairs, 2881 based on Foata normal form. 330/18491 useless extension candidates. Maximal degree in co-relation 197553. Up to 12610 conditions per place. [2023-09-01 12:21:50,321 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 967 selfloop transitions, 155 changer transitions 93/1215 dead transitions. [2023-09-01 12:21:50,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1215 transitions, 36964 flow [2023-09-01 12:21:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:21:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:21:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1310 transitions. [2023-09-01 12:21:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302134646962233 [2023-09-01 12:21:50,323 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1310 transitions. [2023-09-01 12:21:50,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1310 transitions. [2023-09-01 12:21:50,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:50,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1310 transitions. [2023-09-01 12:21:50,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.14285714285714) internal successors, (1310), 7 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,326 INFO L175 Difference]: Start difference. First operand has 389 places, 1088 transitions, 31113 flow. Second operand 7 states and 1310 transitions. [2023-09-01 12:21:50,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1215 transitions, 36964 flow [2023-09-01 12:21:57,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1215 transitions, 35436 flow, removed 374 selfloop flow, removed 15 redundant places. [2023-09-01 12:21:57,939 INFO L231 Difference]: Finished difference. Result has 379 places, 1000 transitions, 27200 flow [2023-09-01 12:21:57,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28660, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=895, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27200, PETRI_PLACES=379, PETRI_TRANSITIONS=1000} [2023-09-01 12:21:57,940 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2023-09-01 12:21:57,940 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1000 transitions, 27200 flow [2023-09-01 12:21:57,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.1) internal successors, (1801), 10 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:57,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:57,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-09-01 12:21:57,941 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:57,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1406921524, now seen corresponding path program 11 times [2023-09-01 12:21:57,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:57,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753766341] [2023-09-01 12:21:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:57,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753766341] [2023-09-01 12:21:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753766341] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69562273] [2023-09-01 12:21:58,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:21:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:58,165 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:21:58,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 12:21:58,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:21:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:58,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:21:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:58,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:58,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:21:58,662 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 [2023-09-01 12:21:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69562273] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:21:59,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:21:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-09-01 12:21:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030790653] [2023-09-01 12:21:59,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:21:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:21:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:21:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:22:00,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-09-01 12:22:00,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1000 transitions, 27200 flow. Second operand has 31 states, 31 states have (on average 159.03225806451613) internal successors, (4930), 31 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:00,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-09-01 12:22:00,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:09,342 INFO L130 PetriNetUnfolder]: 10422/18846 cut-off events. [2023-09-01 12:22:09,342 INFO L131 PetriNetUnfolder]: For 587960/587960 co-relation queries the response was YES. [2023-09-01 12:22:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200390 conditions, 18846 events. 10422/18846 cut-off events. For 587960/587960 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 159612 event pairs, 1303 based on Foata normal form. 215/19061 useless extension candidates. Maximal degree in co-relation 200262. Up to 6033 conditions per place. [2023-09-01 12:22:09,674 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 908 selfloop transitions, 677 changer transitions 87/1672 dead transitions. [2023-09-01 12:22:09,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1672 transitions, 43860 flow [2023-09-01 12:22:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-09-01 12:22:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-09-01 12:22:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8991 transitions. [2023-09-01 12:22:09,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37579937304075234 [2023-09-01 12:22:09,680 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8991 transitions. [2023-09-01 12:22:09,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8991 transitions. [2023-09-01 12:22:09,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:09,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8991 transitions. [2023-09-01 12:22:09,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 163.47272727272727) internal successors, (8991), 55 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:09,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 435.0) internal successors, (24360), 56 states have internal predecessors, (24360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:09,698 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 435.0) internal successors, (24360), 56 states have internal predecessors, (24360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:09,698 INFO L175 Difference]: Start difference. First operand has 379 places, 1000 transitions, 27200 flow. Second operand 55 states and 8991 transitions. [2023-09-01 12:22:09,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1672 transitions, 43860 flow [2023-09-01 12:22:17,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1672 transitions, 42947 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-09-01 12:22:17,192 INFO L231 Difference]: Finished difference. Result has 453 places, 1184 transitions, 33606 flow [2023-09-01 12:22:17,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=26709, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=33606, PETRI_PLACES=453, PETRI_TRANSITIONS=1184} [2023-09-01 12:22:17,193 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 428 predicate places. [2023-09-01 12:22:17,193 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1184 transitions, 33606 flow [2023-09-01 12:22:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 159.03225806451613) internal successors, (4930), 31 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:17,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:22:17,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:22:17,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-09-01 12:22:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:17,398 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:22:17,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:22:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -297829614, now seen corresponding path program 12 times [2023-09-01 12:22:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:22:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909659509] [2023-09-01 12:22:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:22:17,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909659509] [2023-09-01 12:22:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909659509] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:22:17,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543680571] [2023-09-01 12:22:17,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:22:17,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:22:17,622 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:22:17,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 12:22:17,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:22:17,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:22:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:22:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:22:18,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:22:18,081 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 108 treesize of output 73 [2023-09-01 12:22:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:22:18,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:22:18,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:22:18,333 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 [2023-09-01 12:22:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:22:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543680571] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:22:18,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:22:18,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:22:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897538454] [2023-09-01 12:22:18,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:22:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:22:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:22:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:22:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:22:20,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:22:20,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1184 transitions, 33606 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:20,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:20,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:22:20,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:29,586 INFO L130 PetriNetUnfolder]: 10235/18552 cut-off events. [2023-09-01 12:22:29,587 INFO L131 PetriNetUnfolder]: For 925000/925000 co-relation queries the response was YES. [2023-09-01 12:22:29,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217412 conditions, 18552 events. 10235/18552 cut-off events. For 925000/925000 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 156575 event pairs, 1557 based on Foata normal form. 106/18658 useless extension candidates. Maximal degree in co-relation 217252. Up to 6494 conditions per place. [2023-09-01 12:22:30,010 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1058 selfloop transitions, 581 changer transitions 14/1653 dead transitions. [2023-09-01 12:22:30,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1653 transitions, 46001 flow [2023-09-01 12:22:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 12:22:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 12:22:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6040 transitions. [2023-09-01 12:22:30,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38569604086845466 [2023-09-01 12:22:30,014 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6040 transitions. [2023-09-01 12:22:30,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6040 transitions. [2023-09-01 12:22:30,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:30,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6040 transitions. [2023-09-01 12:22:30,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 167.77777777777777) internal successors, (6040), 36 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:30,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 435.0) internal successors, (16095), 37 states have internal predecessors, (16095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:30,024 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 435.0) internal successors, (16095), 37 states have internal predecessors, (16095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:30,025 INFO L175 Difference]: Start difference. First operand has 453 places, 1184 transitions, 33606 flow. Second operand 36 states and 6040 transitions. [2023-09-01 12:22:30,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1653 transitions, 46001 flow [2023-09-01 12:22:40,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1653 transitions, 43466 flow, removed 778 selfloop flow, removed 37 redundant places. [2023-09-01 12:22:40,265 INFO L231 Difference]: Finished difference. Result has 446 places, 1190 transitions, 32830 flow [2023-09-01 12:22:40,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=31104, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32830, PETRI_PLACES=446, PETRI_TRANSITIONS=1190} [2023-09-01 12:22:40,266 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 421 predicate places. [2023-09-01 12:22:40,267 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1190 transitions, 32830 flow [2023-09-01 12:22:40,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:40,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:22:40,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:22:40,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-09-01 12:22:40,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-09-01 12:22:40,473 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:22:40,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:22:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash -46192821, now seen corresponding path program 13 times [2023-09-01 12:22:40,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:22:40,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314140105] [2023-09-01 12:22:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:22:40,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314140105] [2023-09-01 12:22:40,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314140105] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:22:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464789381] [2023-09-01 12:22:40,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:22:40,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:22:40,680 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:22:40,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 12:22:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:22:40,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:22:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:22:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:22:41,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:22:41,265 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 [2023-09-01 12:22:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:22:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464789381] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:22:41,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:22:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:22:41,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316635268] [2023-09-01 12:22:41,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:22:41,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:22:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:22:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:22:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:22:43,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:22:43,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1190 transitions, 32830 flow. Second operand has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:43,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:43,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:22:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:51,566 INFO L130 PetriNetUnfolder]: 10229/18508 cut-off events. [2023-09-01 12:22:51,567 INFO L131 PetriNetUnfolder]: For 809481/809481 co-relation queries the response was YES. [2023-09-01 12:22:51,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210284 conditions, 18508 events. 10229/18508 cut-off events. For 809481/809481 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 156366 event pairs, 1340 based on Foata normal form. 8/18516 useless extension candidates. Maximal degree in co-relation 210143. Up to 5966 conditions per place. [2023-09-01 12:22:51,943 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1086 selfloop transitions, 525 changer transitions 16/1627 dead transitions. [2023-09-01 12:22:51,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1627 transitions, 44128 flow [2023-09-01 12:22:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:22:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:22:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5715 transitions. [2023-09-01 12:22:51,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38640973630831643 [2023-09-01 12:22:51,947 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5715 transitions. [2023-09-01 12:22:51,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5715 transitions. [2023-09-01 12:22:51,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:51,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5715 transitions. [2023-09-01 12:22:51,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 168.08823529411765) internal successors, (5715), 34 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:51,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 435.0) internal successors, (15225), 35 states have internal predecessors, (15225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:51,956 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 435.0) internal successors, (15225), 35 states have internal predecessors, (15225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:51,956 INFO L175 Difference]: Start difference. First operand has 446 places, 1190 transitions, 32830 flow. Second operand 34 states and 5715 transitions. [2023-09-01 12:22:51,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1627 transitions, 44128 flow [2023-09-01 12:23:01,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1627 transitions, 43327 flow, removed 82 selfloop flow, removed 23 redundant places. [2023-09-01 12:23:01,593 INFO L231 Difference]: Finished difference. Result has 455 places, 1187 transitions, 33038 flow [2023-09-01 12:23:01,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=32041, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=33038, PETRI_PLACES=455, PETRI_TRANSITIONS=1187} [2023-09-01 12:23:01,593 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 430 predicate places. [2023-09-01 12:23:01,594 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 1187 transitions, 33038 flow [2023-09-01 12:23:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:23:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:23:01,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-09-01 12:23:01,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-09-01 12:23:01,799 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:23:01,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:23:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1510777814, now seen corresponding path program 14 times [2023-09-01 12:23:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:23:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416109896] [2023-09-01 12:23:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:23:01,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:23:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:23:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:23:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:23:02,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416109896] [2023-09-01 12:23:02,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416109896] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:23:02,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228287377] [2023-09-01 12:23:02,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:23:02,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:23:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:23:02,018 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:23:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 12:23:02,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:23:02,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:23:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:23:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:23:02,403 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-09-01 12:23:02,404 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 58 treesize of output 31 [2023-09-01 12:23:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:23:02,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:23:02,794 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 [2023-09-01 12:23:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:03,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228287377] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:23:03,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:23:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-09-01 12:23:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148271798] [2023-09-01 12:23:03,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:23:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:23:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:23:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:23:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:23:05,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 435 [2023-09-01 12:23:05,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1187 transitions, 33038 flow. Second operand has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:05,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:23:05,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 435 [2023-09-01 12:23:05,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:23:15,737 INFO L130 PetriNetUnfolder]: 11266/20241 cut-off events. [2023-09-01 12:23:15,737 INFO L131 PetriNetUnfolder]: For 875992/875992 co-relation queries the response was YES. [2023-09-01 12:23:15,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237199 conditions, 20241 events. 11266/20241 cut-off events. For 875992/875992 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 171447 event pairs, 524 based on Foata normal form. 170/20411 useless extension candidates. Maximal degree in co-relation 237057. Up to 6695 conditions per place. [2023-09-01 12:23:16,027 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 701 selfloop transitions, 1158 changer transitions 26/1885 dead transitions. [2023-09-01 12:23:16,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1885 transitions, 51402 flow [2023-09-01 12:23:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-09-01 12:23:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-09-01 12:23:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 9563 transitions. [2023-09-01 12:23:16,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37903289734443124 [2023-09-01 12:23:16,033 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 9563 transitions. [2023-09-01 12:23:16,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 9563 transitions. [2023-09-01 12:23:16,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:23:16,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 9563 transitions. [2023-09-01 12:23:16,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 164.8793103448276) internal successors, (9563), 58 states have internal predecessors, (9563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:16,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 435.0) internal successors, (25665), 59 states have internal predecessors, (25665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:16,048 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 435.0) internal successors, (25665), 59 states have internal predecessors, (25665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:16,048 INFO L175 Difference]: Start difference. First operand has 455 places, 1187 transitions, 33038 flow. Second operand 58 states and 9563 transitions. [2023-09-01 12:23:16,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1885 transitions, 51402 flow [2023-09-01 12:23:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1885 transitions, 50083 flow, removed 110 selfloop flow, removed 36 redundant places. [2023-09-01 12:23:26,267 INFO L231 Difference]: Finished difference. Result has 485 places, 1538 transitions, 45524 flow [2023-09-01 12:23:26,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=31135, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=793, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=45524, PETRI_PLACES=485, PETRI_TRANSITIONS=1538} [2023-09-01 12:23:26,268 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 460 predicate places. [2023-09-01 12:23:26,268 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1538 transitions, 45524 flow [2023-09-01 12:23:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:26,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:23:26,269 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] [2023-09-01 12:23:26,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-09-01 12:23:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:23:26,474 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:23:26,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:23:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1994685745, now seen corresponding path program 3 times [2023-09-01 12:23:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:23:26,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370844643] [2023-09-01 12:23:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:23:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:23:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:23:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:23:26,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:23:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370844643] [2023-09-01 12:23:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370844643] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:23:26,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:23:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:23:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618658874] [2023-09-01 12:23:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:23:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:23:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:23:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:23:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:23:26,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:23:26,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1538 transitions, 45524 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:26,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:23:26,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:23:26,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:23:35,184 INFO L130 PetriNetUnfolder]: 11164/20023 cut-off events. [2023-09-01 12:23:35,185 INFO L131 PetriNetUnfolder]: For 913970/913970 co-relation queries the response was YES. [2023-09-01 12:23:35,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245863 conditions, 20023 events. 11164/20023 cut-off events. For 913970/913970 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 169515 event pairs, 3389 based on Foata normal form. 80/20103 useless extension candidates. Maximal degree in co-relation 245711. Up to 14440 conditions per place. [2023-09-01 12:23:35,587 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 1312 selfloop transitions, 334 changer transitions 0/1646 dead transitions. [2023-09-01 12:23:35,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1646 transitions, 51997 flow [2023-09-01 12:23:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:23:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:23:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1301 transitions. [2023-09-01 12:23:35,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272577996715928 [2023-09-01 12:23:35,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1301 transitions. [2023-09-01 12:23:35,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1301 transitions. [2023-09-01 12:23:35,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:23:35,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1301 transitions. [2023-09-01 12:23:35,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.85714285714286) internal successors, (1301), 7 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:35,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:35,591 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:35,591 INFO L175 Difference]: Start difference. First operand has 485 places, 1538 transitions, 45524 flow. Second operand 7 states and 1301 transitions. [2023-09-01 12:23:35,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1646 transitions, 51997 flow [2023-09-01 12:23:51,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1646 transitions, 49070 flow, removed 1123 selfloop flow, removed 24 redundant places. [2023-09-01 12:23:51,691 INFO L231 Difference]: Finished difference. Result has 463 places, 1554 transitions, 44050 flow [2023-09-01 12:23:51,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=42750, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=44050, PETRI_PLACES=463, PETRI_TRANSITIONS=1554} [2023-09-01 12:23:51,693 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 438 predicate places. [2023-09-01 12:23:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1554 transitions, 44050 flow [2023-09-01 12:23:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:23:51,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:23:51,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2023-09-01 12:23:51,694 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:23:51,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:23:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1515682656, now seen corresponding path program 15 times [2023-09-01 12:23:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:23:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127692369] [2023-09-01 12:23:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:23:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:23:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:23:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:51,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:23:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127692369] [2023-09-01 12:23:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127692369] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:23:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143323910] [2023-09-01 12:23:51,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:23:51,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:23:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:23:51,924 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:23:51,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 12:23:52,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:23:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:23:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:23:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:23:52,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:23:52,468 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 112 treesize of output 77 [2023-09-01 12:23:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:52,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:23:52,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:23:52,595 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 [2023-09-01 12:23:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143323910] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:23:53,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:23:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:23:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115165396] [2023-09-01 12:23:53,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:23:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:23:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:23:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:23:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:23:54,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:23:54,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1554 transitions, 44050 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:54,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:23:54,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:23:54,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:24:04,222 INFO L130 PetriNetUnfolder]: 11164/20021 cut-off events. [2023-09-01 12:24:04,222 INFO L131 PetriNetUnfolder]: For 812186/812186 co-relation queries the response was YES. [2023-09-01 12:24:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228419 conditions, 20021 events. 11164/20021 cut-off events. For 812186/812186 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 168930 event pairs, 1804 based on Foata normal form. 2/20023 useless extension candidates. Maximal degree in co-relation 228275. Up to 7427 conditions per place. [2023-09-01 12:24:04,886 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1142 selfloop transitions, 654 changer transitions 22/1818 dead transitions. [2023-09-01 12:24:04,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1818 transitions, 51438 flow [2023-09-01 12:24:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 12:24:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 12:24:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4860 transitions. [2023-09-01 12:24:04,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38525564803804996 [2023-09-01 12:24:04,890 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4860 transitions. [2023-09-01 12:24:04,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4860 transitions. [2023-09-01 12:24:04,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:24:04,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4860 transitions. [2023-09-01 12:24:04,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 167.58620689655172) internal successors, (4860), 29 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:04,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 435.0) internal successors, (13050), 30 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:04,898 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 435.0) internal successors, (13050), 30 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:04,898 INFO L175 Difference]: Start difference. First operand has 463 places, 1554 transitions, 44050 flow. Second operand 29 states and 4860 transitions. [2023-09-01 12:24:04,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1818 transitions, 51438 flow [2023-09-01 12:24:17,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1818 transitions, 50557 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-09-01 12:24:17,746 INFO L231 Difference]: Finished difference. Result has 486 places, 1546 transitions, 44469 flow [2023-09-01 12:24:17,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=43327, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=654, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=44469, PETRI_PLACES=486, PETRI_TRANSITIONS=1546} [2023-09-01 12:24:17,747 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 461 predicate places. [2023-09-01 12:24:17,747 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1546 transitions, 44469 flow [2023-09-01 12:24:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:17,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:24:17,748 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] [2023-09-01 12:24:17,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-09-01 12:24:17,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:24:17,951 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:24:17,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:24:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1456830167, now seen corresponding path program 4 times [2023-09-01 12:24:17,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:24:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252881582] [2023-09-01 12:24:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:24:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:24:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:24:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:24:18,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:24:18,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252881582] [2023-09-01 12:24:18,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252881582] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:24:18,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:24:18,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:24:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978142012] [2023-09-01 12:24:18,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:24:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:24:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:24:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:24:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:24:18,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:24:18,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1546 transitions, 44469 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:18,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:24:18,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:24:18,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:24:26,768 INFO L130 PetriNetUnfolder]: 10951/19722 cut-off events. [2023-09-01 12:24:26,768 INFO L131 PetriNetUnfolder]: For 836997/836997 co-relation queries the response was YES. [2023-09-01 12:24:26,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227376 conditions, 19722 events. 10951/19722 cut-off events. For 836997/836997 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 167693 event pairs, 3321 based on Foata normal form. 112/19834 useless extension candidates. Maximal degree in co-relation 227232. Up to 14366 conditions per place. [2023-09-01 12:24:27,061 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 1268 selfloop transitions, 331 changer transitions 24/1623 dead transitions. [2023-09-01 12:24:27,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1623 transitions, 49774 flow [2023-09-01 12:24:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:24:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:24:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1302 transitions. [2023-09-01 12:24:27,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42758620689655175 [2023-09-01 12:24:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1302 transitions. [2023-09-01 12:24:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1302 transitions. [2023-09-01 12:24:27,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:24:27,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1302 transitions. [2023-09-01 12:24:27,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:27,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:27,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:27,067 INFO L175 Difference]: Start difference. First operand has 486 places, 1546 transitions, 44469 flow. Second operand 7 states and 1302 transitions. [2023-09-01 12:24:27,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1623 transitions, 49774 flow [2023-09-01 12:24:40,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1623 transitions, 48715 flow, removed 2 selfloop flow, removed 24 redundant places. [2023-09-01 12:24:40,317 INFO L231 Difference]: Finished difference. Result has 463 places, 1520 transitions, 43373 flow [2023-09-01 12:24:40,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=43063, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=43373, PETRI_PLACES=463, PETRI_TRANSITIONS=1520} [2023-09-01 12:24:40,334 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 438 predicate places. [2023-09-01 12:24:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1520 transitions, 43373 flow [2023-09-01 12:24:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:24:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:24:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-09-01 12:24:40,335 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:24:40,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:24:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1429885926, now seen corresponding path program 16 times [2023-09-01 12:24:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:24:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827211494] [2023-09-01 12:24:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:24:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:24:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:24:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:24:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:24:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827211494] [2023-09-01 12:24:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827211494] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:24:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341018754] [2023-09-01 12:24:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:24:40,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:24:40,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:24:40,658 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:24:40,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-09-01 12:24:40,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:24:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:24:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:24:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:24:41,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:24:41,114 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 112 treesize of output 77 [2023-09-01 12:24:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:24:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:24:41,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:24:41,241 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 [2023-09-01 12:24:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:24:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341018754] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:24:41,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:24:41,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:24:41,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115789889] [2023-09-01 12:24:41,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:24:41,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:24:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:24:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:24:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:24:43,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:24:43,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1520 transitions, 43373 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:43,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:24:43,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:24:43,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:24:52,590 INFO L130 PetriNetUnfolder]: 10816/19473 cut-off events. [2023-09-01 12:24:52,591 INFO L131 PetriNetUnfolder]: For 792962/792962 co-relation queries the response was YES. [2023-09-01 12:24:52,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223215 conditions, 19473 events. 10816/19473 cut-off events. For 792962/792962 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 164136 event pairs, 1764 based on Foata normal form. 77/19550 useless extension candidates. Maximal degree in co-relation 223071. Up to 7298 conditions per place. [2023-09-01 12:24:52,883 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1083 selfloop transitions, 704 changer transitions 17/1804 dead transitions. [2023-09-01 12:24:52,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1804 transitions, 51114 flow [2023-09-01 12:24:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:24:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:24:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5193 transitions. [2023-09-01 12:24:52,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38509454949944383 [2023-09-01 12:24:52,887 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5193 transitions. [2023-09-01 12:24:52,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5193 transitions. [2023-09-01 12:24:52,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:24:52,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5193 transitions. [2023-09-01 12:24:52,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 167.51612903225808) internal successors, (5193), 31 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:52,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 435.0) internal successors, (13920), 32 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:52,895 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 435.0) internal successors, (13920), 32 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:24:52,895 INFO L175 Difference]: Start difference. First operand has 463 places, 1520 transitions, 43373 flow. Second operand 31 states and 5193 transitions. [2023-09-01 12:24:52,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1804 transitions, 51114 flow [2023-09-01 12:25:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1804 transitions, 50176 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-09-01 12:25:04,827 INFO L231 Difference]: Finished difference. Result has 487 places, 1514 transitions, 43898 flow [2023-09-01 12:25:04,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=42600, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43898, PETRI_PLACES=487, PETRI_TRANSITIONS=1514} [2023-09-01 12:25:04,829 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 462 predicate places. [2023-09-01 12:25:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1514 transitions, 43898 flow [2023-09-01 12:25:04,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:04,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:25:04,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:25:04,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-09-01 12:25:05,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:25:05,033 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:25:05,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:25:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2091303397, now seen corresponding path program 5 times [2023-09-01 12:25:05,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:25:05,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171243908] [2023-09-01 12:25:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:25:05,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:25:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:25:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:25:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:25:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171243908] [2023-09-01 12:25:05,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171243908] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:25:05,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:25:05,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:25:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241129266] [2023-09-01 12:25:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:25:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:25:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:25:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:25:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:25:05,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:25:05,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1514 transitions, 43898 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:05,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:25:05,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:25:05,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:25:13,656 INFO L130 PetriNetUnfolder]: 10652/19283 cut-off events. [2023-09-01 12:25:13,656 INFO L131 PetriNetUnfolder]: For 812654/812654 co-relation queries the response was YES. [2023-09-01 12:25:14,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224275 conditions, 19283 events. 10652/19283 cut-off events. For 812654/812654 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 163810 event pairs, 3331 based on Foata normal form. 146/19429 useless extension candidates. Maximal degree in co-relation 224130. Up to 14272 conditions per place. [2023-09-01 12:25:14,191 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 1100 selfloop transitions, 403 changer transitions 25/1528 dead transitions. [2023-09-01 12:25:14,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1528 transitions, 47123 flow [2023-09-01 12:25:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:25:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:25:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1303 transitions. [2023-09-01 12:25:14,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791461412151066 [2023-09-01 12:25:14,193 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1303 transitions. [2023-09-01 12:25:14,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1303 transitions. [2023-09-01 12:25:14,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:25:14,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1303 transitions. [2023-09-01 12:25:14,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.14285714285714) internal successors, (1303), 7 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:14,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:14,196 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:14,196 INFO L175 Difference]: Start difference. First operand has 487 places, 1514 transitions, 43898 flow. Second operand 7 states and 1303 transitions. [2023-09-01 12:25:14,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1528 transitions, 47123 flow [2023-09-01 12:25:27,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1528 transitions, 44854 flow, removed 121 selfloop flow, removed 39 redundant places. [2023-09-01 12:25:27,301 INFO L231 Difference]: Finished difference. Result has 450 places, 1464 transitions, 41078 flow [2023-09-01 12:25:27,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=40984, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=41078, PETRI_PLACES=450, PETRI_TRANSITIONS=1464} [2023-09-01 12:25:27,302 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 425 predicate places. [2023-09-01 12:25:27,302 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1464 transitions, 41078 flow [2023-09-01 12:25:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:27,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:25:27,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:25:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2023-09-01 12:25:27,303 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:25:27,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:25:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash -332574319, now seen corresponding path program 17 times [2023-09-01 12:25:27,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:25:27,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918980278] [2023-09-01 12:25:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:25:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:25:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:25:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:25:27,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:25:27,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918980278] [2023-09-01 12:25:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918980278] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:25:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910263581] [2023-09-01 12:25:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:25:27,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:25:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:25:27,506 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:25:27,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-09-01 12:25:27,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:25:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:25:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:25:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:25:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:25:27,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:25:27,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:25:27,993 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 [2023-09-01 12:25:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:25:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910263581] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:25:28,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:25:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:25:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169992708] [2023-09-01 12:25:28,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:25:28,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:25:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:25:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:25:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:25:30,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 435 [2023-09-01 12:25:30,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1464 transitions, 41078 flow. Second operand has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:30,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:25:30,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 435 [2023-09-01 12:25:30,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:25:40,155 INFO L130 PetriNetUnfolder]: 10354/18779 cut-off events. [2023-09-01 12:25:40,155 INFO L131 PetriNetUnfolder]: For 749488/749488 co-relation queries the response was YES. [2023-09-01 12:25:40,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210633 conditions, 18779 events. 10354/18779 cut-off events. For 749488/749488 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 158917 event pairs, 965 based on Foata normal form. 271/19050 useless extension candidates. Maximal degree in co-relation 210499. Up to 6261 conditions per place. [2023-09-01 12:25:40,804 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 1063 selfloop transitions, 720 changer transitions 31/1814 dead transitions. [2023-09-01 12:25:40,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1814 transitions, 49357 flow [2023-09-01 12:25:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 12:25:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 12:25:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7470 transitions. [2023-09-01 12:25:40,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816091954022989 [2023-09-01 12:25:40,809 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7470 transitions. [2023-09-01 12:25:40,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7470 transitions. [2023-09-01 12:25:40,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:25:40,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7470 transitions. [2023-09-01 12:25:40,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 166.0) internal successors, (7470), 45 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:40,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 435.0) internal successors, (20010), 46 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:40,822 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 435.0) internal successors, (20010), 46 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:40,822 INFO L175 Difference]: Start difference. First operand has 450 places, 1464 transitions, 41078 flow. Second operand 45 states and 7470 transitions. [2023-09-01 12:25:40,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1814 transitions, 49357 flow [2023-09-01 12:25:52,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1814 transitions, 48404 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-09-01 12:25:52,419 INFO L231 Difference]: Finished difference. Result has 491 places, 1484 transitions, 42383 flow [2023-09-01 12:25:52,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39388, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=42383, PETRI_PLACES=491, PETRI_TRANSITIONS=1484} [2023-09-01 12:25:52,420 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 466 predicate places. [2023-09-01 12:25:52,420 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1484 transitions, 42383 flow [2023-09-01 12:25:52,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 161.03225806451613) internal successors, (4992), 31 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:52,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:25:52,421 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] [2023-09-01 12:25:52,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-09-01 12:25:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-09-01 12:25:52,625 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:25:52,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:25:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash 457695017, now seen corresponding path program 6 times [2023-09-01 12:25:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:25:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81139914] [2023-09-01 12:25:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:25:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:25:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:25:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:25:52,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:25:52,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81139914] [2023-09-01 12:25:52,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81139914] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:25:52,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:25:52,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:25:52,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760915318] [2023-09-01 12:25:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:25:52,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:25:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:25:52,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:25:52,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:25:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:25:52,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1484 transitions, 42383 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:52,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:25:52,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:25:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:00,197 INFO L130 PetriNetUnfolder]: 9982/18007 cut-off events. [2023-09-01 12:26:00,198 INFO L131 PetriNetUnfolder]: For 726280/726280 co-relation queries the response was YES. [2023-09-01 12:26:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208874 conditions, 18007 events. 9982/18007 cut-off events. For 726280/726280 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 150331 event pairs, 3179 based on Foata normal form. 80/18087 useless extension candidates. Maximal degree in co-relation 208729. Up to 14096 conditions per place. [2023-09-01 12:26:00,464 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 1109 selfloop transitions, 410 changer transitions 1/1520 dead transitions. [2023-09-01 12:26:00,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1520 transitions, 46112 flow [2023-09-01 12:26:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:26:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:26:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1301 transitions. [2023-09-01 12:26:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272577996715928 [2023-09-01 12:26:00,469 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1301 transitions. [2023-09-01 12:26:00,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1301 transitions. [2023-09-01 12:26:00,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:00,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1301 transitions. [2023-09-01 12:26:00,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.85714285714286) internal successors, (1301), 7 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:00,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:00,474 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:00,474 INFO L175 Difference]: Start difference. First operand has 491 places, 1484 transitions, 42383 flow. Second operand 7 states and 1301 transitions. [2023-09-01 12:26:00,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1520 transitions, 46112 flow [2023-09-01 12:26:12,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1520 transitions, 44937 flow, removed 88 selfloop flow, removed 30 redundant places. [2023-09-01 12:26:12,056 INFO L231 Difference]: Finished difference. Result has 463 places, 1470 transitions, 41646 flow [2023-09-01 12:26:12,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=40795, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=41646, PETRI_PLACES=463, PETRI_TRANSITIONS=1470} [2023-09-01 12:26:12,060 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 438 predicate places. [2023-09-01 12:26:12,060 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1470 transitions, 41646 flow [2023-09-01 12:26:12,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:12,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:12,061 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] [2023-09-01 12:26:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2023-09-01 12:26:12,061 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:26:12,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash -64579725, now seen corresponding path program 7 times [2023-09-01 12:26:12,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:12,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859104480] [2023-09-01 12:26:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:26:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859104480] [2023-09-01 12:26:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859104480] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:26:12,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:26:12,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:26:12,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061438497] [2023-09-01 12:26:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:26:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:26:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:26:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:26:12,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:26:12,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1470 transitions, 41646 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:12,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:12,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:26:12,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:18,906 INFO L130 PetriNetUnfolder]: 9733/17596 cut-off events. [2023-09-01 12:26:18,906 INFO L131 PetriNetUnfolder]: For 631637/631637 co-relation queries the response was YES. [2023-09-01 12:26:19,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199495 conditions, 17596 events. 9733/17596 cut-off events. For 631637/631637 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 146144 event pairs, 598 based on Foata normal form. 82/17678 useless extension candidates. Maximal degree in co-relation 199355. Up to 11834 conditions per place. [2023-09-01 12:26:19,164 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 978 selfloop transitions, 527 changer transitions 1/1506 dead transitions. [2023-09-01 12:26:19,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1506 transitions, 45279 flow [2023-09-01 12:26:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:26:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:26:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1300 transitions. [2023-09-01 12:26:19,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269293924466338 [2023-09-01 12:26:19,166 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1300 transitions. [2023-09-01 12:26:19,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1300 transitions. [2023-09-01 12:26:19,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:19,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1300 transitions. [2023-09-01 12:26:19,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:19,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:19,169 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:19,169 INFO L175 Difference]: Start difference. First operand has 463 places, 1470 transitions, 41646 flow. Second operand 7 states and 1300 transitions. [2023-09-01 12:26:19,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1506 transitions, 45279 flow [2023-09-01 12:26:32,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1506 transitions, 44775 flow, removed 70 selfloop flow, removed 5 redundant places. [2023-09-01 12:26:32,050 INFO L231 Difference]: Finished difference. Result has 464 places, 1458 transitions, 42012 flow [2023-09-01 12:26:32,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=40484, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=42012, PETRI_PLACES=464, PETRI_TRANSITIONS=1458} [2023-09-01 12:26:32,058 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 439 predicate places. [2023-09-01 12:26:32,058 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1458 transitions, 42012 flow [2023-09-01 12:26:32,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:32,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:32,059 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] [2023-09-01 12:26:32,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2023-09-01 12:26:32,059 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:26:32,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 590767743, now seen corresponding path program 8 times [2023-09-01 12:26:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788288380] [2023-09-01 12:26:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:26:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788288380] [2023-09-01 12:26:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788288380] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:26:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296014060] [2023-09-01 12:26:32,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:26:32,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:32,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:32,237 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:26:32,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-09-01 12:26:32,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:26:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:26:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 12:26:32,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:26:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:26:32,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:26:32,622 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:26:32,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:26:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:26:32,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296014060] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:26:32,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:26:32,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-09-01 12:26:32,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578347331] [2023-09-01 12:26:32,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:26:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:26:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:26:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:26:33,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:26:33,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1458 transitions, 42012 flow. Second operand has 14 states, 14 states have (on average 180.78571428571428) internal successors, (2531), 14 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:33,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:33,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:26:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:40,057 INFO L130 PetriNetUnfolder]: 9647/17390 cut-off events. [2023-09-01 12:26:40,057 INFO L131 PetriNetUnfolder]: For 672392/672392 co-relation queries the response was YES. [2023-09-01 12:26:40,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199991 conditions, 17390 events. 9647/17390 cut-off events. For 672392/672392 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 144317 event pairs, 2566 based on Foata normal form. 36/17426 useless extension candidates. Maximal degree in co-relation 199850. Up to 13664 conditions per place. [2023-09-01 12:26:40,315 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 967 selfloop transitions, 503 changer transitions 0/1470 dead transitions. [2023-09-01 12:26:40,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1470 transitions, 45128 flow [2023-09-01 12:26:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:26:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:26:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1291 transitions. [2023-09-01 12:26:40,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239737274220033 [2023-09-01 12:26:40,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1291 transitions. [2023-09-01 12:26:40,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1291 transitions. [2023-09-01 12:26:40,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:40,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1291 transitions. [2023-09-01 12:26:40,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:40,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:40,320 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:40,320 INFO L175 Difference]: Start difference. First operand has 464 places, 1458 transitions, 42012 flow. Second operand 7 states and 1291 transitions. [2023-09-01 12:26:40,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1470 transitions, 45128 flow [2023-09-01 12:26:52,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1470 transitions, 43985 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-09-01 12:26:52,749 INFO L231 Difference]: Finished difference. Result has 464 places, 1443 transitions, 41514 flow [2023-09-01 12:26:52,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=40390, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=41514, PETRI_PLACES=464, PETRI_TRANSITIONS=1443} [2023-09-01 12:26:52,750 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 439 predicate places. [2023-09-01 12:26:52,751 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1443 transitions, 41514 flow [2023-09-01 12:26:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 180.78571428571428) internal successors, (2531), 14 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:52,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:52,751 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] [2023-09-01 12:26:52,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-09-01 12:26:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:52,956 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:26:52,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash -352107463, now seen corresponding path program 9 times [2023-09-01 12:26:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068860233] [2023-09-01 12:26:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:26:53,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:53,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068860233] [2023-09-01 12:26:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068860233] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:26:53,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:26:53,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 12:26:53,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777243661] [2023-09-01 12:26:53,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:26:53,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:26:53,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:26:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:26:53,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-09-01 12:26:53,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1443 transitions, 41514 flow. Second operand has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:53,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:53,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-09-01 12:26:53,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:59,838 INFO L130 PetriNetUnfolder]: 9467/17050 cut-off events. [2023-09-01 12:26:59,838 INFO L131 PetriNetUnfolder]: For 652404/652404 co-relation queries the response was YES. [2023-09-01 12:27:00,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196376 conditions, 17050 events. 9467/17050 cut-off events. For 652404/652404 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 140847 event pairs, 2468 based on Foata normal form. 62/17112 useless extension candidates. Maximal degree in co-relation 196236. Up to 13162 conditions per place. [2023-09-01 12:27:00,168 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 936 selfloop transitions, 529 changer transitions 1/1466 dead transitions. [2023-09-01 12:27:00,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1466 transitions, 44846 flow [2023-09-01 12:27:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2023-09-01 12:27:00,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42495894909688015 [2023-09-01 12:27:00,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2023-09-01 12:27:00,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2023-09-01 12:27:00,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:00,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2023-09-01 12:27:00,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:00,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:00,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:00,172 INFO L175 Difference]: Start difference. First operand has 464 places, 1443 transitions, 41514 flow. Second operand 7 states and 1294 transitions. [2023-09-01 12:27:00,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1466 transitions, 44846 flow [2023-09-01 12:27:11,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1466 transitions, 43698 flow, removed 80 selfloop flow, removed 5 redundant places. [2023-09-01 12:27:11,666 INFO L231 Difference]: Finished difference. Result has 467 places, 1427 transitions, 40993 flow [2023-09-01 12:27:11,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39776, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=40993, PETRI_PLACES=467, PETRI_TRANSITIONS=1427} [2023-09-01 12:27:11,667 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 442 predicate places. [2023-09-01 12:27:11,668 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1427 transitions, 40993 flow [2023-09-01 12:27:11,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.33333333333334) internal successors, (1623), 9 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:11,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:11,668 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] [2023-09-01 12:27:11,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2023-09-01 12:27:11,668 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:11,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 897831235, now seen corresponding path program 10 times [2023-09-01 12:27:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:11,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77971648] [2023-09-01 12:27:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:11,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77971648] [2023-09-01 12:27:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77971648] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871962938] [2023-09-01 12:27:11,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:11,939 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:11,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-09-01 12:27:12,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:12,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 12:27:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:12,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:27:12,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:27:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:27:12,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:27:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:12,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:12,435 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2871 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2871))) (let ((.cse0 (select .cse1 c_~get2~0.base))) (or (= |c_thread1Thread1of1ForFork0_#t~mem2| (select .cse0 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (not (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset))))))) is different from false [2023-09-01 12:27:12,441 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2871 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2871))) (let ((.cse1 (select .cse2 c_~get2~0.base))) (or (let ((.cse0 (* c_thread1Thread1of1ForFork0_~i~0 4))) (= (select (select |c_#memory_int| c_~get1~0.base) (+ c_~get1~0.offset .cse0)) (select .cse1 (+ c_~get2~0.offset .cse0)))) (not (= (select .cse1 c_~get2~0.offset) (select (select .cse2 c_~get1~0.base) c_~get1~0.offset))))))) is different from false [2023-09-01 12:27:12,446 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2871 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2871))) (let ((.cse0 (select (select .cse1 c_~get2~0.base) c_~get2~0.offset))) (or (= .cse0 (select (select |c_#memory_int| c_~get1~0.base) c_~get1~0.offset)) (not (= .cse0 (select (select .cse1 c_~get1~0.base) c_~get1~0.offset))))))) is different from false [2023-09-01 12:27:12,456 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2871 (Array Int Int)) (v_ArrVal_2870 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2870))) (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2871))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (not (= (select (select .cse0 c_~get1~0.base) c_~get1~0.offset) .cse1)) (= (select (select .cse2 c_~get1~0.base) c_~get1~0.offset) .cse1)))))) is different from false [2023-09-01 12:27:12,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:12,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 57 [2023-09-01 12:27:12,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:12,470 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 1492 treesize of output 1327 [2023-09-01 12:27:12,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:12,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 356 [2023-09-01 12:27:12,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:12,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 269 [2023-09-01 12:27:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 12:27:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871962938] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 12:27:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906503378] [2023-09-01 12:27:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:27:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:27:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=510, Unknown=4, NotChecked=196, Total=812 [2023-09-01 12:27:12,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 435 [2023-09-01 12:27:12,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1427 transitions, 40993 flow. Second operand has 29 states, 29 states have (on average 127.6896551724138) internal successors, (3703), 29 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:12,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:12,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 435 [2023-09-01 12:27:12,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:21,300 INFO L130 PetriNetUnfolder]: 9419/17002 cut-off events. [2023-09-01 12:27:21,301 INFO L131 PetriNetUnfolder]: For 648132/648132 co-relation queries the response was YES. [2023-09-01 12:27:21,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195851 conditions, 17002 events. 9419/17002 cut-off events. For 648132/648132 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 140749 event pairs, 2937 based on Foata normal form. 32/17034 useless extension candidates. Maximal degree in co-relation 195709. Up to 7845 conditions per place. [2023-09-01 12:27:21,728 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 1118 selfloop transitions, 438 changer transitions 0/1556 dead transitions. [2023-09-01 12:27:21,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 1556 transitions, 46435 flow [2023-09-01 12:27:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:27:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:27:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2912 transitions. [2023-09-01 12:27:21,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30428422152560086 [2023-09-01 12:27:21,731 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2912 transitions. [2023-09-01 12:27:21,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2912 transitions. [2023-09-01 12:27:21,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:21,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2912 transitions. [2023-09-01 12:27:21,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.36363636363637) internal successors, (2912), 22 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:21,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:21,738 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:21,738 INFO L175 Difference]: Start difference. First operand has 467 places, 1427 transitions, 40993 flow. Second operand 22 states and 2912 transitions. [2023-09-01 12:27:21,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 1556 transitions, 46435 flow [2023-09-01 12:27:32,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1556 transitions, 45296 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-09-01 12:27:32,418 INFO L231 Difference]: Finished difference. Result has 482 places, 1437 transitions, 41078 flow [2023-09-01 12:27:32,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39857, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=41078, PETRI_PLACES=482, PETRI_TRANSITIONS=1437} [2023-09-01 12:27:32,419 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 457 predicate places. [2023-09-01 12:27:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1437 transitions, 41078 flow [2023-09-01 12:27:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 127.6896551724138) internal successors, (3703), 29 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:32,420 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] [2023-09-01 12:27:32,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:32,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:32,625 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:32,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1649868727, now seen corresponding path program 11 times [2023-09-01 12:27:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:32,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757396075] [2023-09-01 12:27:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:32,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757396075] [2023-09-01 12:27:32,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757396075] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:32,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:32,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 12:27:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534104211] [2023-09-01 12:27:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:27:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:27:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:27:33,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 435 [2023-09-01 12:27:33,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1437 transitions, 41078 flow. Second operand has 11 states, 11 states have (on average 176.9090909090909) internal successors, (1946), 11 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:33,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 435 [2023-09-01 12:27:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:40,020 INFO L130 PetriNetUnfolder]: 9681/17642 cut-off events. [2023-09-01 12:27:40,020 INFO L131 PetriNetUnfolder]: For 667082/667082 co-relation queries the response was YES. [2023-09-01 12:27:40,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201872 conditions, 17642 events. 9681/17642 cut-off events. For 667082/667082 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 149266 event pairs, 3187 based on Foata normal form. 120/17762 useless extension candidates. Maximal degree in co-relation 201732. Up to 14105 conditions per place. [2023-09-01 12:27:40,285 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 1216 selfloop transitions, 326 changer transitions 45/1587 dead transitions. [2023-09-01 12:27:40,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1587 transitions, 48517 flow [2023-09-01 12:27:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:27:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:27:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1462 transitions. [2023-09-01 12:27:40,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42011494252873566 [2023-09-01 12:27:40,287 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1462 transitions. [2023-09-01 12:27:40,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1462 transitions. [2023-09-01 12:27:40,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:40,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1462 transitions. [2023-09-01 12:27:40,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 182.75) internal successors, (1462), 8 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:40,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:40,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:40,290 INFO L175 Difference]: Start difference. First operand has 482 places, 1437 transitions, 41078 flow. Second operand 8 states and 1462 transitions. [2023-09-01 12:27:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1587 transitions, 48517 flow [2023-09-01 12:27:52,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1587 transitions, 47029 flow, removed 91 selfloop flow, removed 12 redundant places. [2023-09-01 12:27:52,417 INFO L231 Difference]: Finished difference. Result has 479 places, 1435 transitions, 40409 flow [2023-09-01 12:27:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39682, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=40409, PETRI_PLACES=479, PETRI_TRANSITIONS=1435} [2023-09-01 12:27:52,418 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 454 predicate places. [2023-09-01 12:27:52,418 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1435 transitions, 40409 flow [2023-09-01 12:27:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 176.9090909090909) internal successors, (1946), 11 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:52,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:52,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2023-09-01 12:27:52,419 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:52,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1054820624, now seen corresponding path program 18 times [2023-09-01 12:27:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728716894] [2023-09-01 12:27:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728716894] [2023-09-01 12:27:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728716894] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63282125] [2023-09-01 12:27:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:27:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:52,632 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-09-01 12:27:52,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:27:52,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:27:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:53,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:53,139 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 108 treesize of output 73 [2023-09-01 12:27:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:53,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:53,441 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 [2023-09-01 12:27:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:53,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63282125] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:53,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:53,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:27:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190192137] [2023-09-01 12:27:53,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:27:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:27:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:27:55,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:27:55,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1435 transitions, 40409 flow. Second operand has 35 states, 35 states have (on average 164.8) internal successors, (5768), 35 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:55,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:27:55,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:03,229 INFO L130 PetriNetUnfolder]: 9583/17365 cut-off events. [2023-09-01 12:28:03,230 INFO L131 PetriNetUnfolder]: For 632115/632115 co-relation queries the response was YES. [2023-09-01 12:28:03,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198118 conditions, 17365 events. 9583/17365 cut-off events. For 632115/632115 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 145240 event pairs, 1626 based on Foata normal form. 2/17367 useless extension candidates. Maximal degree in co-relation 197979. Up to 6246 conditions per place. [2023-09-01 12:28:03,557 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 981 selfloop transitions, 628 changer transitions 6/1615 dead transitions. [2023-09-01 12:28:03,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1615 transitions, 45649 flow [2023-09-01 12:28:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 12:28:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 12:28:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5074 transitions. [2023-09-01 12:28:03,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38881226053639845 [2023-09-01 12:28:03,560 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5074 transitions. [2023-09-01 12:28:03,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5074 transitions. [2023-09-01 12:28:03,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:03,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5074 transitions. [2023-09-01 12:28:03,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 169.13333333333333) internal successors, (5074), 30 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,568 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,568 INFO L175 Difference]: Start difference. First operand has 479 places, 1435 transitions, 40409 flow. Second operand 30 states and 5074 transitions. [2023-09-01 12:28:03,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1615 transitions, 45649 flow [2023-09-01 12:28:15,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1615 transitions, 44877 flow, removed 31 selfloop flow, removed 7 redundant places. [2023-09-01 12:28:15,481 INFO L231 Difference]: Finished difference. Result has 502 places, 1434 transitions, 40931 flow [2023-09-01 12:28:15,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39695, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=40931, PETRI_PLACES=502, PETRI_TRANSITIONS=1434} [2023-09-01 12:28:15,482 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 477 predicate places. [2023-09-01 12:28:15,483 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1434 transitions, 40931 flow [2023-09-01 12:28:15,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 164.8) internal successors, (5768), 35 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:15,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:15,483 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] [2023-09-01 12:28:15,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:15,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-09-01 12:28:15,689 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:15,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:15,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1763527681, now seen corresponding path program 12 times [2023-09-01 12:28:15,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:15,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020603289] [2023-09-01 12:28:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:15,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:15,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020603289] [2023-09-01 12:28:15,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020603289] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412056104] [2023-09-01 12:28:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:15,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:15,977 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:15,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-09-01 12:28:16,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:28:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 12:28:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:28:16,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:28:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:28:16,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:28:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412056104] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:28:16,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:28:16,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-09-01 12:28:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6438253] [2023-09-01 12:28:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:28:16,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:28:16,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:16,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:28:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:28:16,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 435 [2023-09-01 12:28:16,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1434 transitions, 40931 flow. Second operand has 10 states, 10 states have (on average 177.1) internal successors, (1771), 10 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:16,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:16,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 435 [2023-09-01 12:28:16,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:23,155 INFO L130 PetriNetUnfolder]: 9417/17065 cut-off events. [2023-09-01 12:28:23,155 INFO L131 PetriNetUnfolder]: For 648985/648985 co-relation queries the response was YES. [2023-09-01 12:28:23,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197324 conditions, 17065 events. 9417/17065 cut-off events. For 648985/648985 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 142270 event pairs, 3169 based on Foata normal form. 56/17121 useless extension candidates. Maximal degree in co-relation 197184. Up to 14122 conditions per place. [2023-09-01 12:28:23,405 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 1115 selfloop transitions, 366 changer transitions 14/1495 dead transitions. [2023-09-01 12:28:23,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1495 transitions, 45494 flow [2023-09-01 12:28:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:28:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:28:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1454 transitions. [2023-09-01 12:28:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417816091954023 [2023-09-01 12:28:23,407 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1454 transitions. [2023-09-01 12:28:23,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1454 transitions. [2023-09-01 12:28:23,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:23,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1454 transitions. [2023-09-01 12:28:23,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 181.75) internal successors, (1454), 8 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:23,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:23,410 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:23,410 INFO L175 Difference]: Start difference. First operand has 502 places, 1434 transitions, 40931 flow. Second operand 8 states and 1454 transitions. [2023-09-01 12:28:23,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1495 transitions, 45494 flow [2023-09-01 12:28:34,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1495 transitions, 43766 flow, removed 22 selfloop flow, removed 28 redundant places. [2023-09-01 12:28:34,386 INFO L231 Difference]: Finished difference. Result has 479 places, 1432 transitions, 40006 flow [2023-09-01 12:28:34,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39258, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=40006, PETRI_PLACES=479, PETRI_TRANSITIONS=1432} [2023-09-01 12:28:34,387 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 454 predicate places. [2023-09-01 12:28:34,387 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1432 transitions, 40006 flow [2023-09-01 12:28:34,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.1) internal successors, (1771), 10 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:34,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:34,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:34,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2023-09-01 12:28:34,594 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:34,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash 823778715, now seen corresponding path program 19 times [2023-09-01 12:28:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:34,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735910703] [2023-09-01 12:28:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:34,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735910703] [2023-09-01 12:28:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735910703] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308486503] [2023-09-01 12:28:34,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:34,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:34,804 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:34,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-09-01 12:28:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:28:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:35,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:28:35,288 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 112 treesize of output 77 [2023-09-01 12:28:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:35,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:35,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:28:35,389 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 [2023-09-01 12:28:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:35,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308486503] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:35,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:35,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:28:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207899556] [2023-09-01 12:28:35,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:35,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:28:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:28:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:28:37,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 435 [2023-09-01 12:28:37,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1432 transitions, 40006 flow. Second operand has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:37,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:37,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 435 [2023-09-01 12:28:37,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:45,196 INFO L130 PetriNetUnfolder]: 9391/16979 cut-off events. [2023-09-01 12:28:45,196 INFO L131 PetriNetUnfolder]: For 602065/602065 co-relation queries the response was YES. [2023-09-01 12:28:45,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193717 conditions, 16979 events. 9391/16979 cut-off events. For 602065/602065 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 140777 event pairs, 1378 based on Foata normal form. 4/16983 useless extension candidates. Maximal degree in co-relation 193582. Up to 5592 conditions per place. [2023-09-01 12:28:45,433 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1084 selfloop transitions, 484 changer transitions 19/1587 dead transitions. [2023-09-01 12:28:45,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1587 transitions, 44927 flow [2023-09-01 12:28:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:28:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:28:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4033 transitions. [2023-09-01 12:28:45,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38630268199233714 [2023-09-01 12:28:45,436 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4033 transitions. [2023-09-01 12:28:45,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4033 transitions. [2023-09-01 12:28:45,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:45,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4033 transitions. [2023-09-01 12:28:45,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.04166666666666) internal successors, (4033), 24 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 435.0) internal successors, (10875), 25 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,443 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 435.0) internal successors, (10875), 25 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,443 INFO L175 Difference]: Start difference. First operand has 479 places, 1432 transitions, 40006 flow. Second operand 24 states and 4033 transitions. [2023-09-01 12:28:45,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1587 transitions, 44927 flow [2023-09-01 12:28:56,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1587 transitions, 44137 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-09-01 12:28:56,332 INFO L231 Difference]: Finished difference. Result has 495 places, 1423 transitions, 39957 flow [2023-09-01 12:28:56,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=39246, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=39957, PETRI_PLACES=495, PETRI_TRANSITIONS=1423} [2023-09-01 12:28:56,333 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 470 predicate places. [2023-09-01 12:28:56,333 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1423 transitions, 39957 flow [2023-09-01 12:28:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 162.96875) internal successors, (5215), 32 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:56,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:56,334 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] [2023-09-01 12:28:56,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-09-01 12:28:56,540 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:56,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1465095227, now seen corresponding path program 13 times [2023-09-01 12:28:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026162605] [2023-09-01 12:28:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026162605] [2023-09-01 12:28:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026162605] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376615174] [2023-09-01 12:28:56,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:56,865 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:56,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-09-01 12:28:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 12:28:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:57,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:28:57,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:28:57,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:28:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:28:57,265 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:28:57,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2023-09-01 12:28:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:57,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:28:57,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 54 [2023-09-01 12:28:57,529 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 12:28:57,529 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 360 treesize of output 319 [2023-09-01 12:28:57,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:28:57,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 296 [2023-09-01 12:28:57,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:28:57,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 223 [2023-09-01 12:28:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376615174] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:57,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:57,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-09-01 12:28:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28753738] [2023-09-01 12:28:57,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:28:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:28:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=729, Unknown=18, NotChecked=0, Total=870 [2023-09-01 12:28:58,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 435 [2023-09-01 12:28:58,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1423 transitions, 39957 flow. Second operand has 30 states, 30 states have (on average 123.76666666666667) internal successors, (3713), 30 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:58,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:58,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 435 [2023-09-01 12:28:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:05,305 INFO L130 PetriNetUnfolder]: 9003/16323 cut-off events. [2023-09-01 12:29:05,305 INFO L131 PetriNetUnfolder]: For 618158/618158 co-relation queries the response was YES. [2023-09-01 12:29:05,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188349 conditions, 16323 events. 9003/16323 cut-off events. For 618158/618158 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 134960 event pairs, 2957 based on Foata normal form. 184/16507 useless extension candidates. Maximal degree in co-relation 188214. Up to 9894 conditions per place. [2023-09-01 12:29:05,532 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 1001 selfloop transitions, 343 changer transitions 101/1445 dead transitions. [2023-09-01 12:29:05,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1445 transitions, 42214 flow [2023-09-01 12:29:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:29:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:29:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1932 transitions. [2023-09-01 12:29:05,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2960919540229885 [2023-09-01 12:29:05,534 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1932 transitions. [2023-09-01 12:29:05,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1932 transitions. [2023-09-01 12:29:05,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:05,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1932 transitions. [2023-09-01 12:29:05,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.8) internal successors, (1932), 15 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:05,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:05,539 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:05,539 INFO L175 Difference]: Start difference. First operand has 495 places, 1423 transitions, 39957 flow. Second operand 15 states and 1932 transitions. [2023-09-01 12:29:05,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1445 transitions, 42214 flow [2023-09-01 12:29:15,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1445 transitions, 41410 flow, removed 19 selfloop flow, removed 25 redundant places. [2023-09-01 12:29:15,065 INFO L231 Difference]: Finished difference. Result has 476 places, 1290 transitions, 35452 flow [2023-09-01 12:29:15,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=37005, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=35452, PETRI_PLACES=476, PETRI_TRANSITIONS=1290} [2023-09-01 12:29:15,066 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 451 predicate places. [2023-09-01 12:29:15,066 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1290 transitions, 35452 flow [2023-09-01 12:29:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 123.76666666666667) internal successors, (3713), 30 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:15,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:15,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:15,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-09-01 12:29:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-09-01 12:29:15,273 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:15,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 891324673, now seen corresponding path program 20 times [2023-09-01 12:29:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873751036] [2023-09-01 12:29:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873751036] [2023-09-01 12:29:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873751036] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277737674] [2023-09-01 12:29:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:29:15,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:15,467 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:15,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-09-01 12:29:15,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:29:15,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 12:29:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:15,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:29:15,965 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 108 treesize of output 73 [2023-09-01 12:29:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:16,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:29:16,288 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 [2023-09-01 12:29:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277737674] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:16,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 12:29:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051392109] [2023-09-01 12:29:16,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:16,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:29:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:29:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:29:18,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-09-01 12:29:18,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1290 transitions, 35452 flow. Second operand has 32 states, 32 states have (on average 164.96875) internal successors, (5279), 32 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:18,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:18,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-09-01 12:29:18,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:24,576 INFO L130 PetriNetUnfolder]: 8831/15773 cut-off events. [2023-09-01 12:29:24,576 INFO L131 PetriNetUnfolder]: For 552530/552530 co-relation queries the response was YES. [2023-09-01 12:29:24,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180094 conditions, 15773 events. 8831/15773 cut-off events. For 552530/552530 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 127871 event pairs, 1192 based on Foata normal form. 4/15777 useless extension candidates. Maximal degree in co-relation 179964. Up to 5222 conditions per place. [2023-09-01 12:29:24,781 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 969 selfloop transitions, 454 changer transitions 6/1429 dead transitions. [2023-09-01 12:29:24,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1429 transitions, 39666 flow [2023-09-01 12:29:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:29:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:29:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4406 transitions. [2023-09-01 12:29:24,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38956675508399646 [2023-09-01 12:29:24,784 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4406 transitions. [2023-09-01 12:29:24,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4406 transitions. [2023-09-01 12:29:24,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:24,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4406 transitions. [2023-09-01 12:29:24,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 169.46153846153845) internal successors, (4406), 26 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:24,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:24,792 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:24,792 INFO L175 Difference]: Start difference. First operand has 476 places, 1290 transitions, 35452 flow. Second operand 26 states and 4406 transitions. [2023-09-01 12:29:24,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1429 transitions, 39666 flow [2023-09-01 12:29:32,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1429 transitions, 36742 flow, removed 208 selfloop flow, removed 27 redundant places. [2023-09-01 12:29:32,614 INFO L231 Difference]: Finished difference. Result has 453 places, 1291 transitions, 33546 flow [2023-09-01 12:29:32,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=32624, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=33546, PETRI_PLACES=453, PETRI_TRANSITIONS=1291} [2023-09-01 12:29:32,615 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 428 predicate places. [2023-09-01 12:29:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1291 transitions, 33546 flow [2023-09-01 12:29:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 164.96875) internal successors, (5279), 32 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:32,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:32,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:32,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:32,822 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:32,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2060012189, now seen corresponding path program 21 times [2023-09-01 12:29:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:32,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4396296] [2023-09-01 12:29:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:33,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4396296] [2023-09-01 12:29:33,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4396296] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:33,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339611872] [2023-09-01 12:29:33,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:29:33,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:33,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:33,023 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:33,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-09-01 12:29:33,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:29:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:29:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:33,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:29:33,573 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 108 treesize of output 73 [2023-09-01 12:29:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:33,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:33,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:29:33,823 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 Killed by 15