./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:16:25,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:16:25,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:16:25,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:16:25,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:16:25,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:16:25,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:16:25,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:16:25,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:16:25,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:16:25,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:16:25,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:16:25,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:16:25,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:16:25,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:16:25,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:16:25,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:16:25,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:16:25,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:16:25,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:16:25,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:16:25,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:16:25,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:16:25,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:16:25,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:16:25,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:16:25,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:16:25,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:16:25,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:16:25,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:16:25,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:16:25,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:16:25,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:16:25,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:16:25,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:16:25,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:16:25,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:16:25,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:16:25,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:16:25,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:16:25,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:16:25,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:16:25,485 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:16:25,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:16:25,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:16:25,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:16:25,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:16:25,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:16:25,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:16:25,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:16:25,488 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:16:25,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:16:25,489 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:16:25,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:16:25,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:16:25,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:16:25,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:16:25,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:16:25,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:16:25,491 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:16:25,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:16:25,491 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:16:25,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:16:25,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:16:25,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:16:25,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:16:25,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:16:25,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:16:25,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:16:25,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:16:25,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:16:25,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:16:25,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:16:25,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:16:25,494 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:16:25,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:16:25,494 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:16:25,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:16:25,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:16:25,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:16:25,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:16:25,829 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:16:25,829 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:16:25,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-31 01:16:26,923 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:16:27,166 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:16:27,171 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-31 01:16:27,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dc1409d/afec0c1974864f2eb48a2abdbe8f2af6/FLAG525a14893 [2023-08-31 01:16:27,190 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dc1409d/afec0c1974864f2eb48a2abdbe8f2af6 [2023-08-31 01:16:27,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:16:27,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:16:27,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:27,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:16:27,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:16:27,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc8e98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27, skipping insertion in model container [2023-08-31 01:16:27,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:16:27,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:16:27,412 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-name-comparator-symm.wvr.c[3856,3869] [2023-08-31 01:16:27,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:27,439 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:16:27,475 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-name-comparator-symm.wvr.c[3856,3869] [2023-08-31 01:16:27,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:27,492 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:16:27,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27 WrapperNode [2023-08-31 01:16:27,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:27,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:27,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:16:27,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:16:27,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,559 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-08-31 01:16:27,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:27,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:16:27,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:16:27,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:16:27,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:16:27,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:16:27,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:16:27,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:16:27,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (1/1) ... [2023-08-31 01:16:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:16:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:27,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:16:27,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:16:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:16:27,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:16:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:16:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:16:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:16:27,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:16:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:16:27,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:16:27,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:16:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:16:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:16:27,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:16:27,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:16:27,699 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:16:27,813 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:16:27,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:16:28,213 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:16:28,223 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:16:28,223 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 01:16:28,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:16:28 BoogieIcfgContainer [2023-08-31 01:16:28,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:16:28,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:16:28,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:16:28,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:16:28,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:16:27" (1/3) ... [2023-08-31 01:16:28,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf42ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:16:28, skipping insertion in model container [2023-08-31 01:16:28,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:27" (2/3) ... [2023-08-31 01:16:28,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf42ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:16:28, skipping insertion in model container [2023-08-31 01:16:28,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:16:28" (3/3) ... [2023-08-31 01:16:28,238 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-08-31 01:16:28,246 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:16:28,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:16:28,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:16:28,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:16:28,401 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 01:16:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 260 transitions, 536 flow [2023-08-31 01:16:28,570 INFO L130 PetriNetUnfolder]: 19/258 cut-off events. [2023-08-31 01:16:28,571 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:16:28,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 19/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-31 01:16:28,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 260 transitions, 536 flow [2023-08-31 01:16:28,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 250 transitions, 512 flow [2023-08-31 01:16:28,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:16:28,604 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 250 transitions, 512 flow [2023-08-31 01:16:28,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 250 transitions, 512 flow [2023-08-31 01:16:28,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 250 transitions, 512 flow [2023-08-31 01:16:28,666 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-08-31 01:16:28,669 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:16:28,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 19/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-08-31 01:16:28,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 9828 [2023-08-31 01:16:36,301 INFO L134 LiptonReduction]: Checked pairs total: 8979 [2023-08-31 01:16:36,301 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-31 01:16:36,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:16:36,319 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;@54adda51, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:16:36,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 01:16:36,326 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 01:16:36,326 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:16:36,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:36,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:36,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:36,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1252061878, now seen corresponding path program 1 times [2023-08-31 01:16:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29996805] [2023-08-31 01:16:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:36,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29996805] [2023-08-31 01:16:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29996805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:16:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212966112] [2023-08-31 01:16:36,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:16:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:16:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:16:36,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-31 01:16:36,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:36,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:36,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-31 01:16:36,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:36,900 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2023-08-31 01:16:36,901 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 01:16:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-31 01:16:36,903 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 01:16:36,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-08-31 01:16:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:16:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:16:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-31 01:16:36,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43297746144721233 [2023-08-31 01:16:36,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-31 01:16:36,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-31 01:16:36,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:36,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-31 01:16:36,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:36,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:36,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:36,949 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 730 transitions. [2023-08-31 01:16:36,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-08-31 01:16:36,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:16:36,955 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 01:16:36,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 01:16:36,960 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 01:16:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 01:16:36,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:36,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:36,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:36,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:16:36,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:36,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -249759115, now seen corresponding path program 1 times [2023-08-31 01:16:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:36,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303376864] [2023-08-31 01:16:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:37,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303376864] [2023-08-31 01:16:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303376864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828838482] [2023-08-31 01:16:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:37,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:37,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:16:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-31 01:16:37,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:37,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:16:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828838482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:37,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 01:16:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144091747] [2023-08-31 01:16:37,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:37,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:16:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:16:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:16:37,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-31 01:16:37,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:37,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:37,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-31 01:16:37,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:37,424 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2023-08-31 01:16:37,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 01:16:37,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2023-08-31 01:16:37,429 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2023-08-31 01:16:37,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2023-08-31 01:16:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2023-08-31 01:16:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42597864768683275 [2023-08-31 01:16:37,433 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2023-08-31 01:16:37,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2023-08-31 01:16:37,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:37,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2023-08-31 01:16:37,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:37,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:37,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:37,442 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1197 transitions. [2023-08-31 01:16:37,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2023-08-31 01:16:37,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:37,443 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2023-08-31 01:16:37,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-31 01:16:37,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-31 01:16:37,444 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2023-08-31 01:16:37,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:37,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:37,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:37,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:37,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:37,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1257923115, now seen corresponding path program 2 times [2023-08-31 01:16:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:37,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372702646] [2023-08-31 01:16:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:38,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372702646] [2023-08-31 01:16:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372702646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973656522] [2023-08-31 01:16:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:16:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:16:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:16:38,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-31 01:16:38,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:38,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-31 01:16:38,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:38,437 INFO L130 PetriNetUnfolder]: 57/107 cut-off events. [2023-08-31 01:16:38,437 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:16:38,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 107 events. 57/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2023-08-31 01:16:38,440 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 28 selfloop transitions, 8 changer transitions 3/39 dead transitions. [2023-08-31 01:16:38,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 192 flow [2023-08-31 01:16:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1107 transitions. [2023-08-31 01:16:38,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39395017793594306 [2023-08-31 01:16:38,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1107 transitions. [2023-08-31 01:16:38,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1107 transitions. [2023-08-31 01:16:38,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:38,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1107 transitions. [2023-08-31 01:16:38,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.4) internal successors, (1107), 5 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,452 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1107 transitions. [2023-08-31 01:16:38,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 192 flow [2023-08-31 01:16:38,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 182 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:38,456 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 119 flow [2023-08-31 01:16:38,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-31 01:16:38,457 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-31 01:16:38,457 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 119 flow [2023-08-31 01:16:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:38,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:38,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:16:38,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:38,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1542692659, now seen corresponding path program 3 times [2023-08-31 01:16:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:38,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537670937] [2023-08-31 01:16:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:38,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:38,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537670937] [2023-08-31 01:16:38,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537670937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:38,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:38,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:38,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245600073] [2023-08-31 01:16:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:38,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:16:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:16:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:16:38,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-08-31 01:16:38,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:38,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:38,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-08-31 01:16:38,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:39,127 INFO L130 PetriNetUnfolder]: 73/136 cut-off events. [2023-08-31 01:16:39,127 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-31 01:16:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 136 events. 73/136 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 8 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 384. Up to 89 conditions per place. [2023-08-31 01:16:39,128 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 34 selfloop transitions, 9 changer transitions 1/44 dead transitions. [2023-08-31 01:16:39,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 263 flow [2023-08-31 01:16:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-08-31 01:16:39,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932384341637011 [2023-08-31 01:16:39,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-08-31 01:16:39,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-08-31 01:16:39,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:39,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-08-31 01:16:39,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:39,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:39,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:39,141 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 119 flow. Second operand 5 states and 1105 transitions. [2023-08-31 01:16:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 263 flow [2023-08-31 01:16:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:39,143 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 190 flow [2023-08-31 01:16:39,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-31 01:16:39,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-31 01:16:39,144 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 190 flow [2023-08-31 01:16:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 216.5) internal successors, (1299), 6 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:39,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:39,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:39,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:16:39,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:39,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash 916610877, now seen corresponding path program 4 times [2023-08-31 01:16:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:39,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862944938] [2023-08-31 01:16:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:39,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862944938] [2023-08-31 01:16:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862944938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:39,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328704886] [2023-08-31 01:16:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:16:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:16:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:16:39,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 562 [2023-08-31 01:16:39,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 213.5) internal successors, (1281), 6 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:39,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:39,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 562 [2023-08-31 01:16:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:40,113 INFO L130 PetriNetUnfolder]: 135/258 cut-off events. [2023-08-31 01:16:40,114 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-31 01:16:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 258 events. 135/258 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 915 event pairs, 22 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 877. Up to 120 conditions per place. [2023-08-31 01:16:40,116 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 50 selfloop transitions, 8 changer transitions 8/66 dead transitions. [2023-08-31 01:16:40,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 466 flow [2023-08-31 01:16:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1100 transitions. [2023-08-31 01:16:40,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914590747330961 [2023-08-31 01:16:40,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1100 transitions. [2023-08-31 01:16:40,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1100 transitions. [2023-08-31 01:16:40,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:40,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1100 transitions. [2023-08-31 01:16:40,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.0) internal successors, (1100), 5 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,129 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 190 flow. Second operand 5 states and 1100 transitions. [2023-08-31 01:16:40,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 466 flow [2023-08-31 01:16:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 449 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:40,136 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 249 flow [2023-08-31 01:16:40,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-31 01:16:40,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-31 01:16:40,139 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 249 flow [2023-08-31 01:16:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.5) internal successors, (1281), 6 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:40,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:40,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 01:16:40,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:40,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1558748101, now seen corresponding path program 5 times [2023-08-31 01:16:40,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:40,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291174339] [2023-08-31 01:16:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:40,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291174339] [2023-08-31 01:16:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291174339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:40,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:40,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131305239] [2023-08-31 01:16:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:40,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:16:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:16:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:16:40,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 562 [2023-08-31 01:16:40,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:40,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 562 [2023-08-31 01:16:40,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:40,792 INFO L130 PetriNetUnfolder]: 131/254 cut-off events. [2023-08-31 01:16:40,793 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2023-08-31 01:16:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 254 events. 131/254 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 918 event pairs, 14 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 962. Up to 138 conditions per place. [2023-08-31 01:16:40,795 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 46 selfloop transitions, 12 changer transitions 1/59 dead transitions. [2023-08-31 01:16:40,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 463 flow [2023-08-31 01:16:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1099 transitions. [2023-08-31 01:16:40,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911032028469751 [2023-08-31 01:16:40,798 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1099 transitions. [2023-08-31 01:16:40,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1099 transitions. [2023-08-31 01:16:40,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:40,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1099 transitions. [2023-08-31 01:16:40,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,806 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 249 flow. Second operand 5 states and 1099 transitions. [2023-08-31 01:16:40,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 463 flow [2023-08-31 01:16:40,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:40,809 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 321 flow [2023-08-31 01:16:40,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-31 01:16:40,810 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-08-31 01:16:40,810 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 321 flow [2023-08-31 01:16:40,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:40,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:40,811 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:40,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:16:40,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:40,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash 441881161, now seen corresponding path program 6 times [2023-08-31 01:16:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:40,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408264342] [2023-08-31 01:16:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:40,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408264342] [2023-08-31 01:16:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408264342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:41,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:41,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:41,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355666255] [2023-08-31 01:16:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:16:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:16:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:16:41,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 562 [2023-08-31 01:16:41,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:41,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:41,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 562 [2023-08-31 01:16:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:41,618 INFO L130 PetriNetUnfolder]: 188/375 cut-off events. [2023-08-31 01:16:41,619 INFO L131 PetriNetUnfolder]: For 956/956 co-relation queries the response was YES. [2023-08-31 01:16:41,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 375 events. 188/375 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1607 event pairs, 48 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 1592. Up to 219 conditions per place. [2023-08-31 01:16:41,622 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 57 selfloop transitions, 14 changer transitions 5/76 dead transitions. [2023-08-31 01:16:41,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 695 flow [2023-08-31 01:16:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1103 transitions. [2023-08-31 01:16:41,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925266903914591 [2023-08-31 01:16:41,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1103 transitions. [2023-08-31 01:16:41,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1103 transitions. [2023-08-31 01:16:41,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:41,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1103 transitions. [2023-08-31 01:16:41,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.6) internal successors, (1103), 5 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:41,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:41,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:41,646 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 321 flow. Second operand 5 states and 1103 transitions. [2023-08-31 01:16:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 695 flow [2023-08-31 01:16:41,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 664 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-31 01:16:41,651 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 462 flow [2023-08-31 01:16:41,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-31 01:16:41,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-31 01:16:41,652 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 462 flow [2023-08-31 01:16:41,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:41,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:16:41,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:41,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 188433506, now seen corresponding path program 1 times [2023-08-31 01:16:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:41,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375791941] [2023-08-31 01:16:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:41,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375791941] [2023-08-31 01:16:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375791941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631704253] [2023-08-31 01:16:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:41,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:41,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:41,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:16:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:16:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631704253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:42,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 01:16:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329103276] [2023-08-31 01:16:42,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:16:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:16:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:16:42,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:42,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 223.125) internal successors, (1785), 8 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:42,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:42,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:42,412 INFO L130 PetriNetUnfolder]: 184/360 cut-off events. [2023-08-31 01:16:42,412 INFO L131 PetriNetUnfolder]: For 1397/1397 co-relation queries the response was YES. [2023-08-31 01:16:42,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 360 events. 184/360 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1461 event pairs, 26 based on Foata normal form. 12/360 useless extension candidates. Maximal degree in co-relation 1748. Up to 161 conditions per place. [2023-08-31 01:16:42,415 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 61 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2023-08-31 01:16:42,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 734 flow [2023-08-31 01:16:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2023-08-31 01:16:42,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40640569395017795 [2023-08-31 01:16:42,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2023-08-31 01:16:42,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2023-08-31 01:16:42,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:42,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2023-08-31 01:16:42,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,426 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,426 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 462 flow. Second operand 5 states and 1142 transitions. [2023-08-31 01:16:42,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 734 flow [2023-08-31 01:16:42,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 718 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-31 01:16:42,432 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 485 flow [2023-08-31 01:16:42,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-08-31 01:16:42,433 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-08-31 01:16:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 485 flow [2023-08-31 01:16:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.125) internal successors, (1785), 8 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:42,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:42,640 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,SelfDestructingSolverStorable7 [2023-08-31 01:16:42,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:42,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -558172369, now seen corresponding path program 1 times [2023-08-31 01:16:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128828265] [2023-08-31 01:16:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:42,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:42,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128828265] [2023-08-31 01:16:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128828265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:42,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:42,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:42,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645384206] [2023-08-31 01:16:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:42,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:42,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:42,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-31 01:16:42,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:42,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:42,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-31 01:16:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:43,057 INFO L130 PetriNetUnfolder]: 174/340 cut-off events. [2023-08-31 01:16:43,058 INFO L131 PetriNetUnfolder]: For 1684/1684 co-relation queries the response was YES. [2023-08-31 01:16:43,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 340 events. 174/340 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1344 event pairs, 48 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1745. Up to 200 conditions per place. [2023-08-31 01:16:43,061 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 12 changer transitions 9/74 dead transitions. [2023-08-31 01:16:43,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 753 flow [2023-08-31 01:16:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1156 transitions. [2023-08-31 01:16:43,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41138790035587186 [2023-08-31 01:16:43,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1156 transitions. [2023-08-31 01:16:43,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1156 transitions. [2023-08-31 01:16:43,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:43,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1156 transitions. [2023-08-31 01:16:43,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.2) internal successors, (1156), 5 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,083 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,084 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 485 flow. Second operand 5 states and 1156 transitions. [2023-08-31 01:16:43,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 753 flow [2023-08-31 01:16:43,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 723 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 01:16:43,090 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 500 flow [2023-08-31 01:16:43,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-31 01:16:43,092 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-08-31 01:16:43,092 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 500 flow [2023-08-31 01:16:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:43,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:16:43,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:43,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -124247684, now seen corresponding path program 2 times [2023-08-31 01:16:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005945596] [2023-08-31 01:16:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005945596] [2023-08-31 01:16:43,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005945596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:43,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947765951] [2023-08-31 01:16:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:16:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:43,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:16:43,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:16:43,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:16:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:16:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:43,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:43,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947765951] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:43,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:16:43,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2023-08-31 01:16:43,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298052485] [2023-08-31 01:16:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:43,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:43,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:16:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-31 01:16:43,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:43,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-31 01:16:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:43,868 INFO L130 PetriNetUnfolder]: 162/317 cut-off events. [2023-08-31 01:16:43,869 INFO L131 PetriNetUnfolder]: For 1430/1430 co-relation queries the response was YES. [2023-08-31 01:16:43,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 317 events. 162/317 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1232 event pairs, 18 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1678. Up to 240 conditions per place. [2023-08-31 01:16:43,872 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 57 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-08-31 01:16:43,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 739 flow [2023-08-31 01:16:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1159 transitions. [2023-08-31 01:16:43,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41245551601423486 [2023-08-31 01:16:43,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1159 transitions. [2023-08-31 01:16:43,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1159 transitions. [2023-08-31 01:16:43,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:43,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1159 transitions. [2023-08-31 01:16:43,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.8) internal successors, (1159), 5 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,882 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,882 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 500 flow. Second operand 5 states and 1159 transitions. [2023-08-31 01:16:43,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 739 flow [2023-08-31 01:16:43,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 705 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-31 01:16:43,889 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 524 flow [2023-08-31 01:16:43,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-31 01:16:43,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-31 01:16:43,890 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 524 flow [2023-08-31 01:16:43,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:43,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:43,890 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:43,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:44,097 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:44,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 83227730, now seen corresponding path program 3 times [2023-08-31 01:16:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:44,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960564215] [2023-08-31 01:16:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960564215] [2023-08-31 01:16:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960564215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:44,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:44,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901111210] [2023-08-31 01:16:44,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:44,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:44,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:44,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:44,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:44,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:44,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:44,496 INFO L130 PetriNetUnfolder]: 158/305 cut-off events. [2023-08-31 01:16:44,496 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-08-31 01:16:44,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 305 events. 158/305 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1139 event pairs, 43 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 1646. Up to 189 conditions per place. [2023-08-31 01:16:44,499 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2023-08-31 01:16:44,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 691 flow [2023-08-31 01:16:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-31 01:16:44,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-31 01:16:44,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-31 01:16:44,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-31 01:16:44,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:44,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-31 01:16:44,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,509 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 524 flow. Second operand 5 states and 1135 transitions. [2023-08-31 01:16:44,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 691 flow [2023-08-31 01:16:44,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 676 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 01:16:44,516 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 512 flow [2023-08-31 01:16:44,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-31 01:16:44,517 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-08-31 01:16:44,517 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 512 flow [2023-08-31 01:16:44,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:44,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:44,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:16:44,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:44,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash 452015418, now seen corresponding path program 4 times [2023-08-31 01:16:44,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:44,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171640662] [2023-08-31 01:16:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:44,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:44,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171640662] [2023-08-31 01:16:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171640662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:44,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:44,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817568364] [2023-08-31 01:16:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:44,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-08-31 01:16:44,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 512 flow. Second operand has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:44,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-08-31 01:16:44,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:44,885 INFO L130 PetriNetUnfolder]: 155/300 cut-off events. [2023-08-31 01:16:44,885 INFO L131 PetriNetUnfolder]: For 1597/1597 co-relation queries the response was YES. [2023-08-31 01:16:44,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 300 events. 155/300 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1126 event pairs, 37 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 1626. Up to 200 conditions per place. [2023-08-31 01:16:44,888 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 14 changer transitions 7/74 dead transitions. [2023-08-31 01:16:44,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 815 flow [2023-08-31 01:16:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1154 transitions. [2023-08-31 01:16:44,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106761565836299 [2023-08-31 01:16:44,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1154 transitions. [2023-08-31 01:16:44,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1154 transitions. [2023-08-31 01:16:44,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:44,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1154 transitions. [2023-08-31 01:16:44,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 230.8) internal successors, (1154), 5 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,899 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 512 flow. Second operand 5 states and 1154 transitions. [2023-08-31 01:16:44,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 815 flow [2023-08-31 01:16:44,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:16:44,905 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 549 flow [2023-08-31 01:16:44,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-31 01:16:44,905 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-08-31 01:16:44,906 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 549 flow [2023-08-31 01:16:44,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:44,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:44,906 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:44,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:16:44,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:44,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1469209266, now seen corresponding path program 5 times [2023-08-31 01:16:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:44,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893422790] [2023-08-31 01:16:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:45,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:45,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893422790] [2023-08-31 01:16:45,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893422790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:45,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410482462] [2023-08-31 01:16:45,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:45,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:45,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:45,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:45,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:45,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:45,324 INFO L130 PetriNetUnfolder]: 150/286 cut-off events. [2023-08-31 01:16:45,324 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-08-31 01:16:45,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 286 events. 150/286 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1013 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 1640. Up to 200 conditions per place. [2023-08-31 01:16:45,327 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 49 selfloop transitions, 14 changer transitions 2/65 dead transitions. [2023-08-31 01:16:45,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 742 flow [2023-08-31 01:16:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2023-08-31 01:16:45,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40427046263345195 [2023-08-31 01:16:45,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2023-08-31 01:16:45,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2023-08-31 01:16:45,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:45,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2023-08-31 01:16:45,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,337 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,337 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 549 flow. Second operand 5 states and 1136 transitions. [2023-08-31 01:16:45,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 742 flow [2023-08-31 01:16:45,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 708 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-31 01:16:45,343 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 537 flow [2023-08-31 01:16:45,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-31 01:16:45,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-08-31 01:16:45,344 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 537 flow [2023-08-31 01:16:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:45,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:16:45,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:45,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1010058385, now seen corresponding path program 2 times [2023-08-31 01:16:45,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176327256] [2023-08-31 01:16:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:45,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:45,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176327256] [2023-08-31 01:16:45,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176327256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:45,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:45,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:45,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879386213] [2023-08-31 01:16:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:45,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 562 [2023-08-31 01:16:45,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:45,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 562 [2023-08-31 01:16:45,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:45,678 INFO L130 PetriNetUnfolder]: 145/274 cut-off events. [2023-08-31 01:16:45,678 INFO L131 PetriNetUnfolder]: For 1653/1653 co-relation queries the response was YES. [2023-08-31 01:16:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 274 events. 145/274 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 960 event pairs, 11 based on Foata normal form. 8/276 useless extension candidates. Maximal degree in co-relation 1558. Up to 137 conditions per place. [2023-08-31 01:16:45,681 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 51 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-08-31 01:16:45,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 755 flow [2023-08-31 01:16:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1158 transitions. [2023-08-31 01:16:45,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4120996441281139 [2023-08-31 01:16:45,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1158 transitions. [2023-08-31 01:16:45,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1158 transitions. [2023-08-31 01:16:45,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:45,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1158 transitions. [2023-08-31 01:16:45,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.6) internal successors, (1158), 5 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,691 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,691 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 537 flow. Second operand 5 states and 1158 transitions. [2023-08-31 01:16:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 755 flow [2023-08-31 01:16:45,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 732 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 01:16:45,697 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 544 flow [2023-08-31 01:16:45,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-31 01:16:45,698 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-31 01:16:45,698 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 544 flow [2023-08-31 01:16:45,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:45,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:45,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 01:16:45,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:45,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 813217747, now seen corresponding path program 3 times [2023-08-31 01:16:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349911587] [2023-08-31 01:16:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:45,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349911587] [2023-08-31 01:16:45,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349911587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:45,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:45,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600133997] [2023-08-31 01:16:45,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:45,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:45,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:45,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:45,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:46,058 INFO L130 PetriNetUnfolder]: 141/270 cut-off events. [2023-08-31 01:16:46,059 INFO L131 PetriNetUnfolder]: For 1886/1886 co-relation queries the response was YES. [2023-08-31 01:16:46,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 270 events. 141/270 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 41 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1546. Up to 187 conditions per place. [2023-08-31 01:16:46,061 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 4/61 dead transitions. [2023-08-31 01:16:46,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 699 flow [2023-08-31 01:16:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-31 01:16:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-31 01:16:46,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:46,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,072 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 544 flow. Second operand 5 states and 1135 transitions. [2023-08-31 01:16:46,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 699 flow [2023-08-31 01:16:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 668 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-31 01:16:46,081 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 509 flow [2023-08-31 01:16:46,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-08-31 01:16:46,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-31 01:16:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 509 flow [2023-08-31 01:16:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:46,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 01:16:46,083 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:46,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2119422363, now seen corresponding path program 4 times [2023-08-31 01:16:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570583284] [2023-08-31 01:16:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:46,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570583284] [2023-08-31 01:16:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570583284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:46,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372493335] [2023-08-31 01:16:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:46,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:46,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:46,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 509 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:46,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:46,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:46,446 INFO L130 PetriNetUnfolder]: 124/230 cut-off events. [2023-08-31 01:16:46,446 INFO L131 PetriNetUnfolder]: For 1587/1587 co-relation queries the response was YES. [2023-08-31 01:16:46,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 230 events. 124/230 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 718 event pairs, 31 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1364. Up to 144 conditions per place. [2023-08-31 01:16:46,449 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2023-08-31 01:16:46,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 660 flow [2023-08-31 01:16:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1135 transitions. [2023-08-31 01:16:46,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40391459074733094 [2023-08-31 01:16:46,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:46,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1135 transitions. [2023-08-31 01:16:46,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,476 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,476 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 509 flow. Second operand 5 states and 1135 transitions. [2023-08-31 01:16:46,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 660 flow [2023-08-31 01:16:46,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 612 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-31 01:16:46,483 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 464 flow [2023-08-31 01:16:46,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-31 01:16:46,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-08-31 01:16:46,485 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 464 flow [2023-08-31 01:16:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:46,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 01:16:46,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:46,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1470993204, now seen corresponding path program 6 times [2023-08-31 01:16:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:46,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099267222] [2023-08-31 01:16:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:46,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:46,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099267222] [2023-08-31 01:16:46,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099267222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:16:46,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:16:46,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:16:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841428825] [2023-08-31 01:16:46,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:16:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:16:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:16:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:16:46,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-31 01:16:46,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:46,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-31 01:16:46,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:46,823 INFO L130 PetriNetUnfolder]: 114/205 cut-off events. [2023-08-31 01:16:46,823 INFO L131 PetriNetUnfolder]: For 1406/1406 co-relation queries the response was YES. [2023-08-31 01:16:46,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 205 events. 114/205 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 601 event pairs, 31 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 1221. Up to 152 conditions per place. [2023-08-31 01:16:46,826 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 41 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-08-31 01:16:46,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 609 flow [2023-08-31 01:16:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:16:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:16:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1134 transitions. [2023-08-31 01:16:46,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40355871886121 [2023-08-31 01:16:46,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1134 transitions. [2023-08-31 01:16:46,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1134 transitions. [2023-08-31 01:16:46,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:46,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1134 transitions. [2023-08-31 01:16:46,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 226.8) internal successors, (1134), 5 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,836 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,836 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 464 flow. Second operand 5 states and 1134 transitions. [2023-08-31 01:16:46,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 609 flow [2023-08-31 01:16:46,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 539 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-31 01:16:46,841 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 405 flow [2023-08-31 01:16:46,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-31 01:16:46,842 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-08-31 01:16:46,842 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 405 flow [2023-08-31 01:16:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:46,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:46,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:46,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:16:46,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:46,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash 727784278, now seen corresponding path program 1 times [2023-08-31 01:16:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:46,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728495931] [2023-08-31 01:16:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:46,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:47,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:47,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728495931] [2023-08-31 01:16:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728495931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661327202] [2023-08-31 01:16:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:47,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:47,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:16:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:16:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:48,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2023-08-31 01:16:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:48,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:50,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:50,167 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 216 treesize of output 144 [2023-08-31 01:16:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:50,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661327202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:50,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-31 01:16:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405104140] [2023-08-31 01:16:50,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:16:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:16:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:16:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 562 [2023-08-31 01:16:51,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 405 flow. Second operand has 23 states, 23 states have (on average 198.04347826086956) internal successors, (4555), 23 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:51,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:16:51,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 562 [2023-08-31 01:16:51,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:16:54,496 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-08-31 01:16:54,496 INFO L131 PetriNetUnfolder]: For 2245/2245 co-relation queries the response was YES. [2023-08-31 01:16:54,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 503 events. 265/503 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2212 event pairs, 15 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 2583. Up to 142 conditions per place. [2023-08-31 01:16:54,501 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 90 selfloop transitions, 51 changer transitions 28/169 dead transitions. [2023-08-31 01:16:54,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 169 transitions, 1513 flow [2023-08-31 01:16:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:16:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:16:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4645 transitions. [2023-08-31 01:16:54,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35935324152870185 [2023-08-31 01:16:54,512 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4645 transitions. [2023-08-31 01:16:54,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4645 transitions. [2023-08-31 01:16:54,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:16:54,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4645 transitions. [2023-08-31 01:16:54,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 201.95652173913044) internal successors, (4645), 23 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:54,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:54,538 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:54,538 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 405 flow. Second operand 23 states and 4645 transitions. [2023-08-31 01:16:54,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 169 transitions, 1513 flow [2023-08-31 01:16:54,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1435 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-31 01:16:54,546 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 933 flow [2023-08-31 01:16:54,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=933, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-31 01:16:54,547 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-31 01:16:54,547 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 933 flow [2023-08-31 01:16:54,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 198.04347826086956) internal successors, (4555), 23 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:16:54,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:16:54,548 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:16:54,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:16:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:16:54,761 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:16:54,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:16:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 765734618, now seen corresponding path program 2 times [2023-08-31 01:16:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:16:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741827895] [2023-08-31 01:16:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:16:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:16:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:16:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:55,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:16:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741827895] [2023-08-31 01:16:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741827895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:16:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012593096] [2023-08-31 01:16:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:16:55,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:16:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:16:55,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:16:55,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:16:55,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:16:55,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:16:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:16:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:16:56,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-08-31 01:16:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:16:58,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:16:58,080 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 340 treesize of output 220 [2023-08-31 01:16:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:16:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012593096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:16:58,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:16:58,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-31 01:16:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609901777] [2023-08-31 01:16:58,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:16:58,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:16:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:16:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:16:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:17:00,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:00,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 933 flow. Second operand has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:00,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:00,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:02,049 INFO L130 PetriNetUnfolder]: 309/625 cut-off events. [2023-08-31 01:17:02,050 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-08-31 01:17:02,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 625 events. 309/625 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3053 event pairs, 42 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3554. Up to 184 conditions per place. [2023-08-31 01:17:02,056 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 96 selfloop transitions, 58 changer transitions 7/161 dead transitions. [2023-08-31 01:17:02,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1887 flow [2023-08-31 01:17:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:17:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:17:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3189 transitions. [2023-08-31 01:17:02,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546485765124555 [2023-08-31 01:17:02,061 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3189 transitions. [2023-08-31 01:17:02,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3189 transitions. [2023-08-31 01:17:02,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:02,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3189 transitions. [2023-08-31 01:17:02,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 199.3125) internal successors, (3189), 16 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:02,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:02,075 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:02,076 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 933 flow. Second operand 16 states and 3189 transitions. [2023-08-31 01:17:02,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1887 flow [2023-08-31 01:17:02,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 161 transitions, 1564 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-08-31 01:17:02,093 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1196 flow [2023-08-31 01:17:02,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1196, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-08-31 01:17:02,094 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-31 01:17:02,094 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1196 flow [2023-08-31 01:17:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:02,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:02,095 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:02,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:02,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:02,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -12713086, now seen corresponding path program 3 times [2023-08-31 01:17:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685262355] [2023-08-31 01:17:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685262355] [2023-08-31 01:17:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685262355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539935823] [2023-08-31 01:17:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:17:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:03,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:03,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:17:03,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:17:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 01:17:03,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:03,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-08-31 01:17:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:03,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:05,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:05,893 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 344 treesize of output 232 [2023-08-31 01:17:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:06,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539935823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:06,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:06,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-31 01:17:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353975511] [2023-08-31 01:17:06,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:17:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:06,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:17:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:17:07,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:07,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1196 flow. Second operand has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:07,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:07,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:10,617 INFO L130 PetriNetUnfolder]: 400/856 cut-off events. [2023-08-31 01:17:10,617 INFO L131 PetriNetUnfolder]: For 4962/4962 co-relation queries the response was YES. [2023-08-31 01:17:10,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 856 events. 400/856 cut-off events. For 4962/4962 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4841 event pairs, 73 based on Foata normal form. 12/866 useless extension candidates. Maximal degree in co-relation 4474. Up to 411 conditions per place. [2023-08-31 01:17:10,625 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 141 selfloop transitions, 77 changer transitions 20/238 dead transitions. [2023-08-31 01:17:10,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 238 transitions, 2432 flow [2023-08-31 01:17:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:17:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:17:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5192 transitions. [2023-08-31 01:17:10,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3553243909115795 [2023-08-31 01:17:10,635 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5192 transitions. [2023-08-31 01:17:10,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5192 transitions. [2023-08-31 01:17:10,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:10,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5192 transitions. [2023-08-31 01:17:10,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 199.69230769230768) internal successors, (5192), 26 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,658 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,658 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1196 flow. Second operand 26 states and 5192 transitions. [2023-08-31 01:17:10,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 238 transitions, 2432 flow [2023-08-31 01:17:10,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 238 transitions, 2236 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-08-31 01:17:10,690 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1639 flow [2023-08-31 01:17:10,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1639, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2023-08-31 01:17:10,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-08-31 01:17:10,691 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1639 flow [2023-08-31 01:17:10,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:10,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:10,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:10,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:10,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2073572888, now seen corresponding path program 4 times [2023-08-31 01:17:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:10,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261581966] [2023-08-31 01:17:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261581966] [2023-08-31 01:17:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261581966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70137975] [2023-08-31 01:17:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:17:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:11,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:11,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:17:11,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:17:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 01:17:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:12,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-08-31 01:17:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:12,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:14,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:14,343 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 354 treesize of output 234 [2023-08-31 01:17:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70137975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:15,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:15,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-31 01:17:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065075141] [2023-08-31 01:17:15,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:17:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:17:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:17:16,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:16,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1639 flow. Second operand has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:16,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:16,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:16,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:17,684 INFO L130 PetriNetUnfolder]: 427/929 cut-off events. [2023-08-31 01:17:17,684 INFO L131 PetriNetUnfolder]: For 5290/5290 co-relation queries the response was YES. [2023-08-31 01:17:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 929 events. 427/929 cut-off events. For 5290/5290 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5441 event pairs, 55 based on Foata normal form. 9/936 useless extension candidates. Maximal degree in co-relation 4939. Up to 239 conditions per place. [2023-08-31 01:17:17,691 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 127 selfloop transitions, 81 changer transitions 21/229 dead transitions. [2023-08-31 01:17:17,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2700 flow [2023-08-31 01:17:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:17:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:17:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3597 transitions. [2023-08-31 01:17:17,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3555753262158956 [2023-08-31 01:17:17,697 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3597 transitions. [2023-08-31 01:17:17,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3597 transitions. [2023-08-31 01:17:17,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:17,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3597 transitions. [2023-08-31 01:17:17,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 199.83333333333334) internal successors, (3597), 18 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,710 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,710 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1639 flow. Second operand 18 states and 3597 transitions. [2023-08-31 01:17:17,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2700 flow [2023-08-31 01:17:17,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 229 transitions, 2445 flow, removed 117 selfloop flow, removed 7 redundant places. [2023-08-31 01:17:17,745 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1802 flow [2023-08-31 01:17:17,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2023-08-31 01:17:17,746 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-08-31 01:17:17,746 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1802 flow [2023-08-31 01:17:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:17,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:17,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:17,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:17,957 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:17,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1557072660, now seen corresponding path program 5 times [2023-08-31 01:17:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:17,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722388385] [2023-08-31 01:17:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722388385] [2023-08-31 01:17:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722388385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440435740] [2023-08-31 01:17:18,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:17:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:18,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:18,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:18,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:17:18,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:17:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:17:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:19,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2023-08-31 01:17:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:19,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:21,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:21,230 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 325 treesize of output 213 [2023-08-31 01:17:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:21,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440435740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:21,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:21,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-31 01:17:21,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997461817] [2023-08-31 01:17:21,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:21,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:17:21,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:17:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:17:22,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:22,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1802 flow. Second operand has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:22,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:22,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:22,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:23,620 INFO L130 PetriNetUnfolder]: 471/1035 cut-off events. [2023-08-31 01:17:23,621 INFO L131 PetriNetUnfolder]: For 6541/6541 co-relation queries the response was YES. [2023-08-31 01:17:23,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1035 events. 471/1035 cut-off events. For 6541/6541 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6357 event pairs, 78 based on Foata normal form. 2/1035 useless extension candidates. Maximal degree in co-relation 5614. Up to 441 conditions per place. [2023-08-31 01:17:23,630 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 160 selfloop transitions, 90 changer transitions 12/262 dead transitions. [2023-08-31 01:17:23,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 262 transitions, 3113 flow [2023-08-31 01:17:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:17:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:17:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4186 transitions. [2023-08-31 01:17:23,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35468564650059314 [2023-08-31 01:17:23,636 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4186 transitions. [2023-08-31 01:17:23,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4186 transitions. [2023-08-31 01:17:23,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:23,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4186 transitions. [2023-08-31 01:17:23,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 199.33333333333334) internal successors, (4186), 21 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,651 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,651 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1802 flow. Second operand 21 states and 4186 transitions. [2023-08-31 01:17:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 262 transitions, 3113 flow [2023-08-31 01:17:23,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 262 transitions, 2965 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-08-31 01:17:23,687 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 2317 flow [2023-08-31 01:17:23,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2317, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2023-08-31 01:17:23,688 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-31 01:17:23,688 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 2317 flow [2023-08-31 01:17:23,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.04761904761904) internal successors, (4117), 21 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:23,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:23,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 01:17:23,897 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,SelfDestructingSolverStorable21 [2023-08-31 01:17:23,898 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:23,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash -840476054, now seen corresponding path program 6 times [2023-08-31 01:17:23,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:23,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453684112] [2023-08-31 01:17:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453684112] [2023-08-31 01:17:24,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453684112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:24,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074809110] [2023-08-31 01:17:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:17:24,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:24,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:24,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:24,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:17:24,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:17:24,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 01:17:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:25,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2023-08-31 01:17:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:25,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:27,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:27,651 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 441 treesize of output 321 [2023-08-31 01:17:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074809110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:28,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-31 01:17:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190949663] [2023-08-31 01:17:28,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:17:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:17:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:17:29,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:29,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 2317 flow. Second operand has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:29,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:29,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:29,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:31,680 INFO L130 PetriNetUnfolder]: 536/1174 cut-off events. [2023-08-31 01:17:31,680 INFO L131 PetriNetUnfolder]: For 9351/9351 co-relation queries the response was YES. [2023-08-31 01:17:31,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1174 events. 536/1174 cut-off events. For 9351/9351 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7459 event pairs, 94 based on Foata normal form. 14/1186 useless extension candidates. Maximal degree in co-relation 6741. Up to 633 conditions per place. [2023-08-31 01:17:31,692 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 169 selfloop transitions, 99 changer transitions 22/290 dead transitions. [2023-08-31 01:17:31,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3711 flow [2023-08-31 01:17:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:17:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:17:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3998 transitions. [2023-08-31 01:17:31,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556939501779359 [2023-08-31 01:17:31,699 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3998 transitions. [2023-08-31 01:17:31,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3998 transitions. [2023-08-31 01:17:31,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:31,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3998 transitions. [2023-08-31 01:17:31,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.9) internal successors, (3998), 20 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,713 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,713 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 2317 flow. Second operand 20 states and 3998 transitions. [2023-08-31 01:17:31,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3711 flow [2023-08-31 01:17:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 290 transitions, 3528 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-08-31 01:17:31,770 INFO L231 Difference]: Finished difference. Result has 185 places, 217 transitions, 2730 flow [2023-08-31 01:17:31,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2730, PETRI_PLACES=185, PETRI_TRANSITIONS=217} [2023-08-31 01:17:31,771 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-31 01:17:31,771 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 217 transitions, 2730 flow [2023-08-31 01:17:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.1304347826087) internal successors, (4511), 23 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:31,772 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:31,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:31,984 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:31,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1290945382, now seen corresponding path program 7 times [2023-08-31 01:17:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:31,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660489838] [2023-08-31 01:17:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660489838] [2023-08-31 01:17:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660489838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414429355] [2023-08-31 01:17:32,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:17:32,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:32,869 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:32,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:17:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 01:17:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:33,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 117 [2023-08-31 01:17:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:34,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:34,550 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 288 treesize of output 184 [2023-08-31 01:17:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414429355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:34,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-31 01:17:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648762763] [2023-08-31 01:17:34,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:17:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:17:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:17:35,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-31 01:17:35,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 217 transitions, 2730 flow. Second operand has 21 states, 21 states have (on average 196.9047619047619) internal successors, (4135), 21 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:35,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:35,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-31 01:17:35,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:38,755 INFO L130 PetriNetUnfolder]: 729/1682 cut-off events. [2023-08-31 01:17:38,755 INFO L131 PetriNetUnfolder]: For 15656/15656 co-relation queries the response was YES. [2023-08-31 01:17:38,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10298 conditions, 1682 events. 729/1682 cut-off events. For 15656/15656 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12084 event pairs, 71 based on Foata normal form. 9/1689 useless extension candidates. Maximal degree in co-relation 10220. Up to 433 conditions per place. [2023-08-31 01:17:38,771 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 180 selfloop transitions, 187 changer transitions 24/391 dead transitions. [2023-08-31 01:17:38,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 5330 flow [2023-08-31 01:17:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 01:17:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 01:17:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5411 transitions. [2023-08-31 01:17:38,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35659681033346513 [2023-08-31 01:17:38,777 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5411 transitions. [2023-08-31 01:17:38,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5411 transitions. [2023-08-31 01:17:38,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:38,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5411 transitions. [2023-08-31 01:17:38,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 200.40740740740742) internal successors, (5411), 27 states have internal predecessors, (5411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,795 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,796 INFO L175 Difference]: Start difference. First operand has 185 places, 217 transitions, 2730 flow. Second operand 27 states and 5411 transitions. [2023-08-31 01:17:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 5330 flow [2023-08-31 01:17:38,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 391 transitions, 5136 flow, removed 92 selfloop flow, removed 7 redundant places. [2023-08-31 01:17:38,908 INFO L231 Difference]: Finished difference. Result has 214 places, 289 transitions, 4361 flow [2023-08-31 01:17:38,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4361, PETRI_PLACES=214, PETRI_TRANSITIONS=289} [2023-08-31 01:17:38,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-08-31 01:17:38,909 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 289 transitions, 4361 flow [2023-08-31 01:17:38,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 196.9047619047619) internal successors, (4135), 21 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:38,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:38,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-31 01:17:39,116 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,SelfDestructingSolverStorable23 [2023-08-31 01:17:39,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:39,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 781489274, now seen corresponding path program 8 times [2023-08-31 01:17:39,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:39,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770565220] [2023-08-31 01:17:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:39,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:39,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:39,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770565220] [2023-08-31 01:17:39,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770565220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:39,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824331473] [2023-08-31 01:17:39,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:17:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:39,861 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:39,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:17:39,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:17:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:17:40,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:40,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 91 [2023-08-31 01:17:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:40,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:41,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:41,725 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 400 treesize of output 248 [2023-08-31 01:17:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824331473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:42,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:42,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-31 01:17:42,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897058879] [2023-08-31 01:17:42,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:17:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:17:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:17:43,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:17:43,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 289 transitions, 4361 flow. Second operand has 20 states, 20 states have (on average 195.95) internal successors, (3919), 20 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:43,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:43,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:17:43,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:44,794 INFO L130 PetriNetUnfolder]: 712/1628 cut-off events. [2023-08-31 01:17:44,794 INFO L131 PetriNetUnfolder]: For 17124/17124 co-relation queries the response was YES. [2023-08-31 01:17:44,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10794 conditions, 1628 events. 712/1628 cut-off events. For 17124/17124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11401 event pairs, 142 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 10706. Up to 755 conditions per place. [2023-08-31 01:17:44,818 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 203 selfloop transitions, 122 changer transitions 15/340 dead transitions. [2023-08-31 01:17:44,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 340 transitions, 5390 flow [2023-08-31 01:17:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:17:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:17:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3386 transitions. [2023-08-31 01:17:44,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35440653129579236 [2023-08-31 01:17:44,824 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3386 transitions. [2023-08-31 01:17:44,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3386 transitions. [2023-08-31 01:17:44,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:44,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3386 transitions. [2023-08-31 01:17:44,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 199.1764705882353) internal successors, (3386), 17 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,836 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,836 INFO L175 Difference]: Start difference. First operand has 214 places, 289 transitions, 4361 flow. Second operand 17 states and 3386 transitions. [2023-08-31 01:17:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 340 transitions, 5390 flow [2023-08-31 01:17:44,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 340 transitions, 4619 flow, removed 335 selfloop flow, removed 13 redundant places. [2023-08-31 01:17:44,981 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 3899 flow [2023-08-31 01:17:44,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3899, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-08-31 01:17:44,982 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-08-31 01:17:44,982 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 3899 flow [2023-08-31 01:17:44,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 195.95) internal successors, (3919), 20 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:44,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:44,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:44,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:45,188 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,SelfDestructingSolverStorable24 [2023-08-31 01:17:45,189 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:45,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 854566266, now seen corresponding path program 9 times [2023-08-31 01:17:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:45,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567871677] [2023-08-31 01:17:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:46,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567871677] [2023-08-31 01:17:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567871677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822480876] [2023-08-31 01:17:46,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:17:46,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:46,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:46,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:17:46,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:17:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 01:17:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:17:46,412 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 100 treesize of output 90 [2023-08-31 01:17:46,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 104 [2023-08-31 01:17:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:48,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:48,784 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 356 treesize of output 276 [2023-08-31 01:17:48,800 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 185 treesize of output 181 [2023-08-31 01:17:48,810 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 181 treesize of output 179 [2023-08-31 01:17:48,819 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 179 treesize of output 177 [2023-08-31 01:17:48,831 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 177 treesize of output 175 [2023-08-31 01:17:48,843 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 175 treesize of output 173 [2023-08-31 01:17:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822480876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:49,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-31 01:17:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687841546] [2023-08-31 01:17:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:17:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:17:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=661, Unknown=4, NotChecked=0, Total=756 [2023-08-31 01:17:51,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-08-31 01:17:51,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 3899 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:51,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:51,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-08-31 01:17:51,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:53,324 INFO L130 PetriNetUnfolder]: 812/1860 cut-off events. [2023-08-31 01:17:53,324 INFO L131 PetriNetUnfolder]: For 14241/14241 co-relation queries the response was YES. [2023-08-31 01:17:53,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 1860 events. 812/1860 cut-off events. For 14241/14241 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13453 event pairs, 178 based on Foata normal form. 5/1865 useless extension candidates. Maximal degree in co-relation 10851. Up to 824 conditions per place. [2023-08-31 01:17:53,338 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 183 selfloop transitions, 156 changer transitions 14/353 dead transitions. [2023-08-31 01:17:53,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 353 transitions, 5316 flow [2023-08-31 01:17:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:17:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:17:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2135 transitions. [2023-08-31 01:17:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165776986951364 [2023-08-31 01:17:53,342 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2135 transitions. [2023-08-31 01:17:53,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2135 transitions. [2023-08-31 01:17:53,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:53,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2135 transitions. [2023-08-31 01:17:53,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.91666666666666) internal successors, (2135), 12 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:53,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:53,350 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:53,350 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 3899 flow. Second operand 12 states and 2135 transitions. [2023-08-31 01:17:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 353 transitions, 5316 flow [2023-08-31 01:17:53,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 5058 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-08-31 01:17:53,481 INFO L231 Difference]: Finished difference. Result has 216 places, 304 transitions, 4374 flow [2023-08-31 01:17:53,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4374, PETRI_PLACES=216, PETRI_TRANSITIONS=304} [2023-08-31 01:17:53,481 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2023-08-31 01:17:53,481 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 304 transitions, 4374 flow [2023-08-31 01:17:53,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:53,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:53,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:53,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:53,682 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,SelfDestructingSolverStorable25 [2023-08-31 01:17:53,683 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:53,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1888333352, now seen corresponding path program 10 times [2023-08-31 01:17:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474905016] [2023-08-31 01:17:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:54,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474905016] [2023-08-31 01:17:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474905016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:17:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416260485] [2023-08-31 01:17:54,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:17:54,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:17:54,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:54,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:17:54,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:17:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:17:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:17:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 01:17:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:17:54,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:17:54,801 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 42 treesize of output 40 [2023-08-31 01:17:55,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 110 [2023-08-31 01:17:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:55,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:17:56,612 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (forall ((v_ArrVal_748 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset))))) (.cse1 (< c_~i_4~0 3))) (and (or .cse0 (< 0 c_~result_3~0)) (or (and (< c_~result_3~0 0) (or (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~name_1~0 c_~name_2~0) .cse1)) (forall ((v_ArrVal_748 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) (or .cse0 (< c_~name_2~0 c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) .cse1)))) is different from false [2023-08-31 01:17:56,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:17:56,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 145 [2023-08-31 01:17:56,699 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 94 treesize of output 92 [2023-08-31 01:17:56,704 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 92 treesize of output 90 [2023-08-31 01:17:56,709 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 90 treesize of output 88 [2023-08-31 01:17:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:17:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416260485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:17:56,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:17:56,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-31 01:17:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070495641] [2023-08-31 01:17:56,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:17:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:17:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:17:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-08-31 01:17:56,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-08-31 01:17:56,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 304 transitions, 4374 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:56,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:56,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-08-31 01:17:56,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:59,396 INFO L130 PetriNetUnfolder]: 810/1873 cut-off events. [2023-08-31 01:17:59,396 INFO L131 PetriNetUnfolder]: For 15319/15319 co-relation queries the response was YES. [2023-08-31 01:17:59,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 1873 events. 810/1873 cut-off events. For 15319/15319 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13750 event pairs, 167 based on Foata normal form. 35/1908 useless extension candidates. Maximal degree in co-relation 11128. Up to 771 conditions per place. [2023-08-31 01:17:59,414 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 225 selfloop transitions, 142 changer transitions 25/392 dead transitions. [2023-08-31 01:17:59,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 392 transitions, 5972 flow [2023-08-31 01:17:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:17:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:17:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2856 transitions. [2023-08-31 01:17:59,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761565836298933 [2023-08-31 01:17:59,419 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2856 transitions. [2023-08-31 01:17:59,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2856 transitions. [2023-08-31 01:17:59,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:59,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2856 transitions. [2023-08-31 01:17:59,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.5) internal successors, (2856), 16 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:59,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:59,428 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:59,429 INFO L175 Difference]: Start difference. First operand has 216 places, 304 transitions, 4374 flow. Second operand 16 states and 2856 transitions. [2023-08-31 01:17:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 392 transitions, 5972 flow [2023-08-31 01:17:59,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 392 transitions, 5854 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-08-31 01:17:59,571 INFO L231 Difference]: Finished difference. Result has 232 places, 315 transitions, 4888 flow [2023-08-31 01:17:59,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4888, PETRI_PLACES=232, PETRI_TRANSITIONS=315} [2023-08-31 01:17:59,572 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-08-31 01:17:59,572 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 315 transitions, 4888 flow [2023-08-31 01:17:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:59,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:59,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 01:17:59,778 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,SelfDestructingSolverStorable26 [2023-08-31 01:17:59,779 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:59,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 869721443, now seen corresponding path program 11 times [2023-08-31 01:17:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441359400] [2023-08-31 01:17:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:00,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441359400] [2023-08-31 01:18:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441359400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283370733] [2023-08-31 01:18:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:18:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:00,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:00,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:18:00,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:18:00,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:00,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-31 01:18:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:00,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:00,834 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 01:18:00,834 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 40 treesize of output 19 [2023-08-31 01:18:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283370733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:00,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:18:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472893009] [2023-08-31 01:18:00,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:18:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:18:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:18:01,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 562 [2023-08-31 01:18:01,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 315 transitions, 4888 flow. Second operand has 18 states, 18 states have (on average 210.33333333333334) internal successors, (3786), 18 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:01,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:01,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 562 [2023-08-31 01:18:01,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:02,611 INFO L130 PetriNetUnfolder]: 800/1792 cut-off events. [2023-08-31 01:18:02,612 INFO L131 PetriNetUnfolder]: For 17105/17105 co-relation queries the response was YES. [2023-08-31 01:18:02,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 1792 events. 800/1792 cut-off events. For 17105/17105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12587 event pairs, 88 based on Foata normal form. 16/1808 useless extension candidates. Maximal degree in co-relation 11550. Up to 368 conditions per place. [2023-08-31 01:18:02,627 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 253 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2023-08-31 01:18:02,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 385 transitions, 6365 flow [2023-08-31 01:18:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:18:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:18:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2786 transitions. [2023-08-31 01:18:02,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813304133588831 [2023-08-31 01:18:02,631 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2786 transitions. [2023-08-31 01:18:02,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2786 transitions. [2023-08-31 01:18:02,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:02,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2786 transitions. [2023-08-31 01:18:02,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.30769230769232) internal successors, (2786), 13 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:02,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:02,640 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:02,640 INFO L175 Difference]: Start difference. First operand has 232 places, 315 transitions, 4888 flow. Second operand 13 states and 2786 transitions. [2023-08-31 01:18:02,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 385 transitions, 6365 flow [2023-08-31 01:18:02,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 385 transitions, 6137 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-08-31 01:18:02,792 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 5088 flow [2023-08-31 01:18:02,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5088, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2023-08-31 01:18:02,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-08-31 01:18:02,793 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 5088 flow [2023-08-31 01:18:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.33333333333334) internal successors, (3786), 18 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:02,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:02,793 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:02,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:02,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:02,999 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:02,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash -780460431, now seen corresponding path program 12 times [2023-08-31 01:18:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:03,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453962984] [2023-08-31 01:18:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:03,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453962984] [2023-08-31 01:18:03,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453962984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:03,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865082200] [2023-08-31 01:18:03,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:18:03,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:03,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:03,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:18:03,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:18:03,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:04,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-31 01:18:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:04,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:04,585 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 44 treesize of output 28 [2023-08-31 01:18:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:04,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865082200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:04,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:04,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-31 01:18:04,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979030003] [2023-08-31 01:18:04,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:04,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:18:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:18:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:18:05,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-31 01:18:05,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 5088 flow. Second operand has 23 states, 23 states have (on average 199.1304347826087) internal successors, (4580), 23 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:05,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:05,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-31 01:18:05,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:07,430 INFO L130 PetriNetUnfolder]: 1642/3655 cut-off events. [2023-08-31 01:18:07,430 INFO L131 PetriNetUnfolder]: For 34715/34715 co-relation queries the response was YES. [2023-08-31 01:18:07,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23751 conditions, 3655 events. 1642/3655 cut-off events. For 34715/34715 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29456 event pairs, 323 based on Foata normal form. 34/3689 useless extension candidates. Maximal degree in co-relation 23450. Up to 1002 conditions per place. [2023-08-31 01:18:07,467 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 538 selfloop transitions, 200 changer transitions 1/739 dead transitions. [2023-08-31 01:18:07,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 739 transitions, 12566 flow [2023-08-31 01:18:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:18:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:18:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4473 transitions. [2023-08-31 01:18:07,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36177612423164024 [2023-08-31 01:18:07,473 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4473 transitions. [2023-08-31 01:18:07,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4473 transitions. [2023-08-31 01:18:07,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:07,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4473 transitions. [2023-08-31 01:18:07,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 203.3181818181818) internal successors, (4473), 22 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:07,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:07,488 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:07,488 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 5088 flow. Second operand 22 states and 4473 transitions. [2023-08-31 01:18:07,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 739 transitions, 12566 flow [2023-08-31 01:18:07,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 739 transitions, 12386 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-31 01:18:07,779 INFO L231 Difference]: Finished difference. Result has 261 places, 437 transitions, 7906 flow [2023-08-31 01:18:07,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7906, PETRI_PLACES=261, PETRI_TRANSITIONS=437} [2023-08-31 01:18:07,781 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-31 01:18:07,781 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 437 transitions, 7906 flow [2023-08-31 01:18:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 199.1304347826087) internal successors, (4580), 23 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:07,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:07,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:07,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:07,985 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,SelfDestructingSolverStorable28 [2023-08-31 01:18:07,985 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:07,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1335210813, now seen corresponding path program 13 times [2023-08-31 01:18:07,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118615290] [2023-08-31 01:18:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:07,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118615290] [2023-08-31 01:18:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118615290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816992813] [2023-08-31 01:18:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:18:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:08,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:08,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:18:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:09,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-31 01:18:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:09,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:09,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:09,448 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 44 treesize of output 28 [2023-08-31 01:18:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816992813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:09,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:09,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-08-31 01:18:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348473147] [2023-08-31 01:18:09,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:09,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:18:09,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:18:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:18:10,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-31 01:18:10,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 437 transitions, 7906 flow. Second operand has 19 states, 19 states have (on average 199.1578947368421) internal successors, (3784), 19 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:10,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:10,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-31 01:18:10,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:11,788 INFO L130 PetriNetUnfolder]: 1660/3697 cut-off events. [2023-08-31 01:18:11,788 INFO L131 PetriNetUnfolder]: For 40990/40990 co-relation queries the response was YES. [2023-08-31 01:18:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24822 conditions, 3697 events. 1660/3697 cut-off events. For 40990/40990 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30131 event pairs, 377 based on Foata normal form. 8/3705 useless extension candidates. Maximal degree in co-relation 24454. Up to 1254 conditions per place. [2023-08-31 01:18:11,826 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 288 selfloop transitions, 209 changer transitions 3/500 dead transitions. [2023-08-31 01:18:11,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 500 transitions, 9491 flow [2023-08-31 01:18:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:18:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:18:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3445 transitions. [2023-08-31 01:18:11,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36058195520200964 [2023-08-31 01:18:11,831 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3445 transitions. [2023-08-31 01:18:11,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3445 transitions. [2023-08-31 01:18:11,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:11,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3445 transitions. [2023-08-31 01:18:11,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 202.64705882352942) internal successors, (3445), 17 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:11,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:11,842 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:11,842 INFO L175 Difference]: Start difference. First operand has 261 places, 437 transitions, 7906 flow. Second operand 17 states and 3445 transitions. [2023-08-31 01:18:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 500 transitions, 9491 flow [2023-08-31 01:18:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 500 transitions, 9448 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-31 01:18:12,277 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 8445 flow [2023-08-31 01:18:12,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8445, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2023-08-31 01:18:12,278 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-08-31 01:18:12,279 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 8445 flow [2023-08-31 01:18:12,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 199.1578947368421) internal successors, (3784), 19 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:12,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:12,279 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:12,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:12,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:12,486 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:12,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1635767085, now seen corresponding path program 14 times [2023-08-31 01:18:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:12,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316332247] [2023-08-31 01:18:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:12,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316332247] [2023-08-31 01:18:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316332247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676971142] [2023-08-31 01:18:12,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:18:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:12,982 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:12,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:18:13,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:18:13,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:18:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:13,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-31 01:18:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:13,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:13,767 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 44 treesize of output 28 [2023-08-31 01:18:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676971142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:13,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-31 01:18:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340469621] [2023-08-31 01:18:13,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:18:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:18:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:18:14,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:18:14,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 8445 flow. Second operand has 17 states, 17 states have (on average 209.23529411764707) internal successors, (3557), 17 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:14,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:14,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:18:14,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:15,822 INFO L130 PetriNetUnfolder]: 1666/3695 cut-off events. [2023-08-31 01:18:15,822 INFO L131 PetriNetUnfolder]: For 45512/45512 co-relation queries the response was YES. [2023-08-31 01:18:15,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25608 conditions, 3695 events. 1666/3695 cut-off events. For 45512/45512 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29995 event pairs, 375 based on Foata normal form. 12/3707 useless extension candidates. Maximal degree in co-relation 25502. Up to 1278 conditions per place. [2023-08-31 01:18:15,857 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 304 selfloop transitions, 195 changer transitions 0/499 dead transitions. [2023-08-31 01:18:15,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9958 flow [2023-08-31 01:18:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:18:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:18:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2986 transitions. [2023-08-31 01:18:15,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795119471276055 [2023-08-31 01:18:15,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2986 transitions. [2023-08-31 01:18:15,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2986 transitions. [2023-08-31 01:18:15,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:15,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2986 transitions. [2023-08-31 01:18:15,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 213.28571428571428) internal successors, (2986), 14 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,870 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:15,870 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 8445 flow. Second operand 14 states and 2986 transitions. [2023-08-31 01:18:15,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9958 flow [2023-08-31 01:18:16,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9783 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-31 01:18:16,355 INFO L231 Difference]: Finished difference. Result has 278 places, 444 transitions, 8751 flow [2023-08-31 01:18:16,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8751, PETRI_PLACES=278, PETRI_TRANSITIONS=444} [2023-08-31 01:18:16,355 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-08-31 01:18:16,355 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 444 transitions, 8751 flow [2023-08-31 01:18:16,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.23529411764707) internal successors, (3557), 17 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:16,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:16,356 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:16,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:16,561 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:16,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2050404756, now seen corresponding path program 15 times [2023-08-31 01:18:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604492783] [2023-08-31 01:18:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:17,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:17,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604492783] [2023-08-31 01:18:17,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604492783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:17,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329530998] [2023-08-31 01:18:17,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:18:17,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:17,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:18:17,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:18:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:18:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:17,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-31 01:18:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:17,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:17,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:17,808 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 87 treesize of output 47 [2023-08-31 01:18:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329530998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:17,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:17,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-31 01:18:17,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897623816] [2023-08-31 01:18:17,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:17,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:18:17,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:18:17,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:18:18,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 562 [2023-08-31 01:18:18,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 444 transitions, 8751 flow. Second operand has 23 states, 23 states have (on average 198.95652173913044) internal successors, (4576), 23 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:18,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:18,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 562 [2023-08-31 01:18:18,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:20,677 INFO L130 PetriNetUnfolder]: 1654/3651 cut-off events. [2023-08-31 01:18:20,678 INFO L131 PetriNetUnfolder]: For 48293/48293 co-relation queries the response was YES. [2023-08-31 01:18:20,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25810 conditions, 3651 events. 1654/3651 cut-off events. For 48293/48293 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29318 event pairs, 267 based on Foata normal form. 24/3675 useless extension candidates. Maximal degree in co-relation 25704. Up to 691 conditions per place. [2023-08-31 01:18:20,715 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 460 selfloop transitions, 259 changer transitions 2/721 dead transitions. [2023-08-31 01:18:20,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 721 transitions, 13789 flow [2023-08-31 01:18:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:18:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:18:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5654 transitions. [2023-08-31 01:18:20,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35930350788002036 [2023-08-31 01:18:20,722 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5654 transitions. [2023-08-31 01:18:20,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5654 transitions. [2023-08-31 01:18:20,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:20,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5654 transitions. [2023-08-31 01:18:20,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 201.92857142857142) internal successors, (5654), 28 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:20,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:20,739 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:20,739 INFO L175 Difference]: Start difference. First operand has 278 places, 444 transitions, 8751 flow. Second operand 28 states and 5654 transitions. [2023-08-31 01:18:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 721 transitions, 13789 flow [2023-08-31 01:18:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 721 transitions, 13367 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-31 01:18:21,221 INFO L231 Difference]: Finished difference. Result has 294 places, 515 transitions, 10243 flow [2023-08-31 01:18:21,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10243, PETRI_PLACES=294, PETRI_TRANSITIONS=515} [2023-08-31 01:18:21,222 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-08-31 01:18:21,222 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 515 transitions, 10243 flow [2023-08-31 01:18:21,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 198.95652173913044) internal successors, (4576), 23 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:21,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:21,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:21,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:21,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:21,424 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:21,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1594385250, now seen corresponding path program 16 times [2023-08-31 01:18:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:21,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440212287] [2023-08-31 01:18:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:21,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440212287] [2023-08-31 01:18:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440212287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058584373] [2023-08-31 01:18:22,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:18:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:22,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:22,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 01:18:22,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:18:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:22,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2023-08-31 01:18:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:22,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:22,877 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 125 treesize of output 69 [2023-08-31 01:18:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:22,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058584373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:22,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:22,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-08-31 01:18:22,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012368957] [2023-08-31 01:18:22,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:22,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:18:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:18:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:18:24,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 562 [2023-08-31 01:18:24,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 515 transitions, 10243 flow. Second operand has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:24,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:24,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 562 [2023-08-31 01:18:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:25,244 INFO L130 PetriNetUnfolder]: 1610/3547 cut-off events. [2023-08-31 01:18:25,244 INFO L131 PetriNetUnfolder]: For 49090/49090 co-relation queries the response was YES. [2023-08-31 01:18:25,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3547 events. 1610/3547 cut-off events. For 49090/49090 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28326 event pairs, 721 based on Foata normal form. 8/3555 useless extension candidates. Maximal degree in co-relation 25418. Up to 3296 conditions per place. [2023-08-31 01:18:25,277 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 433 selfloop transitions, 82 changer transitions 10/525 dead transitions. [2023-08-31 01:18:25,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 525 transitions, 11303 flow [2023-08-31 01:18:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:18:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:18:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2237 transitions. [2023-08-31 01:18:25,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36185700420575867 [2023-08-31 01:18:25,280 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2237 transitions. [2023-08-31 01:18:25,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2237 transitions. [2023-08-31 01:18:25,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:25,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2237 transitions. [2023-08-31 01:18:25,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:25,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:25,286 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:25,286 INFO L175 Difference]: Start difference. First operand has 294 places, 515 transitions, 10243 flow. Second operand 11 states and 2237 transitions. [2023-08-31 01:18:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 525 transitions, 11303 flow [2023-08-31 01:18:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 525 transitions, 11051 flow, removed 37 selfloop flow, removed 16 redundant places. [2023-08-31 01:18:25,685 INFO L231 Difference]: Finished difference. Result has 288 places, 505 transitions, 9993 flow [2023-08-31 01:18:25,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9993, PETRI_PLACES=288, PETRI_TRANSITIONS=505} [2023-08-31 01:18:25,686 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-08-31 01:18:25,686 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 505 transitions, 9993 flow [2023-08-31 01:18:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:25,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:25,687 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:25,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:25,888 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:25,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash -86174668, now seen corresponding path program 17 times [2023-08-31 01:18:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:25,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213892165] [2023-08-31 01:18:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:26,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:26,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213892165] [2023-08-31 01:18:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213892165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:26,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027573927] [2023-08-31 01:18:26,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:18:26,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:26,349 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 01:18:26,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:18:26,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 01:18:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:26,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-08-31 01:18:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:26,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:27,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:27,012 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 66 treesize of output 42 [2023-08-31 01:18:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027573927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:27,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:18:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643750801] [2023-08-31 01:18:27,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:18:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:18:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:18:27,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:18:27,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 505 transitions, 9993 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:27,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:27,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:18:27,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:29,093 INFO L130 PetriNetUnfolder]: 1664/3685 cut-off events. [2023-08-31 01:18:29,093 INFO L131 PetriNetUnfolder]: For 49457/49457 co-relation queries the response was YES. [2023-08-31 01:18:29,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26534 conditions, 3685 events. 1664/3685 cut-off events. For 49457/49457 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29781 event pairs, 267 based on Foata normal form. 16/3701 useless extension candidates. Maximal degree in co-relation 26427. Up to 1161 conditions per place. [2023-08-31 01:18:29,127 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 297 selfloop transitions, 265 changer transitions 1/563 dead transitions. [2023-08-31 01:18:29,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 563 transitions, 11867 flow [2023-08-31 01:18:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:18:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:18:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2543 transitions. [2023-08-31 01:18:29,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37707591933570583 [2023-08-31 01:18:29,129 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2543 transitions. [2023-08-31 01:18:29,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2543 transitions. [2023-08-31 01:18:29,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:29,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2543 transitions. [2023-08-31 01:18:29,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.91666666666666) internal successors, (2543), 12 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:29,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:29,135 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:29,135 INFO L175 Difference]: Start difference. First operand has 288 places, 505 transitions, 9993 flow. Second operand 12 states and 2543 transitions. [2023-08-31 01:18:29,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 563 transitions, 11867 flow [2023-08-31 01:18:29,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 563 transitions, 11697 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-31 01:18:29,529 INFO L231 Difference]: Finished difference. Result has 285 places, 520 transitions, 10782 flow [2023-08-31 01:18:29,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10782, PETRI_PLACES=285, PETRI_TRANSITIONS=520} [2023-08-31 01:18:29,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-08-31 01:18:29,529 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 520 transitions, 10782 flow [2023-08-31 01:18:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:29,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:29,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:29,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:29,730 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,SelfDestructingSolverStorable33 [2023-08-31 01:18:29,731 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:29,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 450395604, now seen corresponding path program 18 times [2023-08-31 01:18:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:29,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659033579] [2023-08-31 01:18:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:30,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659033579] [2023-08-31 01:18:30,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659033579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354927428] [2023-08-31 01:18:30,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:18:30,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:30,135 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:30,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 01:18:30,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:18:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:30,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-31 01:18:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:30,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:30,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:30,824 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 65 treesize of output 41 [2023-08-31 01:18:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354927428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:30,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-31 01:18:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3378170] [2023-08-31 01:18:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:18:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:18:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:18:31,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:18:31,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 520 transitions, 10782 flow. Second operand has 19 states, 19 states have (on average 209.26315789473685) internal successors, (3976), 19 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:31,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:31,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:18:31,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:32,552 INFO L130 PetriNetUnfolder]: 1620/3545 cut-off events. [2023-08-31 01:18:32,553 INFO L131 PetriNetUnfolder]: For 53008/53008 co-relation queries the response was YES. [2023-08-31 01:18:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3545 events. 1620/3545 cut-off events. For 53008/53008 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28137 event pairs, 733 based on Foata normal form. 20/3565 useless extension candidates. Maximal degree in co-relation 26369. Up to 3315 conditions per place. [2023-08-31 01:18:32,586 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 440 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2023-08-31 01:18:32,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 522 transitions, 11724 flow [2023-08-31 01:18:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:18:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:18:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1696 transitions. [2023-08-31 01:18:32,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-31 01:18:32,588 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1696 transitions. [2023-08-31 01:18:32,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1696 transitions. [2023-08-31 01:18:32,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:32,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1696 transitions. [2023-08-31 01:18:32,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:32,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:32,591 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:32,591 INFO L175 Difference]: Start difference. First operand has 285 places, 520 transitions, 10782 flow. Second operand 8 states and 1696 transitions. [2023-08-31 01:18:32,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 522 transitions, 11724 flow [2023-08-31 01:18:32,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 522 transitions, 11255 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-31 01:18:32,950 INFO L231 Difference]: Finished difference. Result has 283 places, 512 transitions, 10327 flow [2023-08-31 01:18:32,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10327, PETRI_PLACES=283, PETRI_TRANSITIONS=512} [2023-08-31 01:18:32,951 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-08-31 01:18:32,951 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 512 transitions, 10327 flow [2023-08-31 01:18:32,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 209.26315789473685) internal successors, (3976), 19 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:32,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:32,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:32,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:33,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-31 01:18:33,152 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:33,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 801329013, now seen corresponding path program 19 times [2023-08-31 01:18:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:33,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097234992] [2023-08-31 01:18:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:33,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097234992] [2023-08-31 01:18:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097234992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199111957] [2023-08-31 01:18:33,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:18:33,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:33,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:33,573 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:33,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 01:18:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:18:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:33,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-31 01:18:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:33,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:34,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:34,156 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 117 treesize of output 61 [2023-08-31 01:18:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:34,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199111957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:34,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:18:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823411066] [2023-08-31 01:18:34,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:34,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:18:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:18:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:18:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:18:34,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 512 transitions, 10327 flow. Second operand has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:34,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:34,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:18:34,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:35,808 INFO L130 PetriNetUnfolder]: 1608/3501 cut-off events. [2023-08-31 01:18:35,809 INFO L131 PetriNetUnfolder]: For 49239/49239 co-relation queries the response was YES. [2023-08-31 01:18:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3501 events. 1608/3501 cut-off events. For 49239/49239 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27571 event pairs, 463 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25599. Up to 2377 conditions per place. [2023-08-31 01:18:35,903 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 372 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2023-08-31 01:18:35,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 527 transitions, 11368 flow [2023-08-31 01:18:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:18:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:18:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2321 transitions. [2023-08-31 01:18:35,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37544483985765126 [2023-08-31 01:18:35,906 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2321 transitions. [2023-08-31 01:18:35,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2321 transitions. [2023-08-31 01:18:35,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:35,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2321 transitions. [2023-08-31 01:18:35,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:35,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:35,910 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:35,910 INFO L175 Difference]: Start difference. First operand has 283 places, 512 transitions, 10327 flow. Second operand 11 states and 2321 transitions. [2023-08-31 01:18:35,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 527 transitions, 11368 flow [2023-08-31 01:18:36,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 527 transitions, 11235 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-31 01:18:36,262 INFO L231 Difference]: Finished difference. Result has 286 places, 508 transitions, 10428 flow [2023-08-31 01:18:36,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10118, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10428, PETRI_PLACES=286, PETRI_TRANSITIONS=508} [2023-08-31 01:18:36,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2023-08-31 01:18:36,262 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 508 transitions, 10428 flow [2023-08-31 01:18:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:36,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:36,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:36,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:36,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:36,464 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:36,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1868073493, now seen corresponding path program 20 times [2023-08-31 01:18:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:36,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483407765] [2023-08-31 01:18:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483407765] [2023-08-31 01:18:37,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483407765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:37,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926291714] [2023-08-31 01:18:37,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:18:37,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:37,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:37,177 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 01:18:37,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:18:37,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:37,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-31 01:18:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:37,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:37,862 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 65 treesize of output 41 [2023-08-31 01:18:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926291714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:37,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-08-31 01:18:37,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312550238] [2023-08-31 01:18:37,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:37,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:18:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:18:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-08-31 01:18:38,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 562 [2023-08-31 01:18:38,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 508 transitions, 10428 flow. Second operand has 23 states, 23 states have (on average 200.91304347826087) internal successors, (4621), 23 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:38,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:38,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 562 [2023-08-31 01:18:38,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:40,304 INFO L130 PetriNetUnfolder]: 1658/3639 cut-off events. [2023-08-31 01:18:40,304 INFO L131 PetriNetUnfolder]: For 54497/54497 co-relation queries the response was YES. [2023-08-31 01:18:40,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27126 conditions, 3639 events. 1658/3639 cut-off events. For 54497/54497 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29189 event pairs, 639 based on Foata normal form. 16/3655 useless extension candidates. Maximal degree in co-relation 27019. Up to 3084 conditions per place. [2023-08-31 01:18:40,335 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 458 selfloop transitions, 108 changer transitions 0/566 dead transitions. [2023-08-31 01:18:40,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 566 transitions, 12091 flow [2023-08-31 01:18:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:18:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:18:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2866 transitions. [2023-08-31 01:18:40,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36426029486527706 [2023-08-31 01:18:40,338 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2866 transitions. [2023-08-31 01:18:40,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2866 transitions. [2023-08-31 01:18:40,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:40,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2866 transitions. [2023-08-31 01:18:40,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 204.71428571428572) internal successors, (2866), 14 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:40,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:40,344 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:40,344 INFO L175 Difference]: Start difference. First operand has 286 places, 508 transitions, 10428 flow. Second operand 14 states and 2866 transitions. [2023-08-31 01:18:40,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 566 transitions, 12091 flow [2023-08-31 01:18:40,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 566 transitions, 11893 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-31 01:18:40,729 INFO L231 Difference]: Finished difference. Result has 292 places, 518 transitions, 10716 flow [2023-08-31 01:18:40,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10716, PETRI_PLACES=292, PETRI_TRANSITIONS=518} [2023-08-31 01:18:40,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-08-31 01:18:40,729 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 518 transitions, 10716 flow [2023-08-31 01:18:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 200.91304347826087) internal successors, (4621), 23 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:40,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:40,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:40,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:40,931 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:40,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash -494622950, now seen corresponding path program 21 times [2023-08-31 01:18:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276274606] [2023-08-31 01:18:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:40,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:41,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276274606] [2023-08-31 01:18:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276274606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174665530] [2023-08-31 01:18:41,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:18:41,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:41,353 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:41,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 01:18:41,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:18:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 01:18:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:41,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 91 [2023-08-31 01:18:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:41,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:42,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:42,055 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 65 treesize of output 41 [2023-08-31 01:18:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174665530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:42,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:18:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51867833] [2023-08-31 01:18:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:18:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:18:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:18:42,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:18:42,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 518 transitions, 10716 flow. Second operand has 18 states, 18 states have (on average 209.27777777777777) internal successors, (3767), 18 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:42,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:42,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:18:42,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:43,747 INFO L130 PetriNetUnfolder]: 1698/3775 cut-off events. [2023-08-31 01:18:43,747 INFO L131 PetriNetUnfolder]: For 59878/59878 co-relation queries the response was YES. [2023-08-31 01:18:43,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28252 conditions, 3775 events. 1698/3775 cut-off events. For 59878/59878 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30886 event pairs, 689 based on Foata normal form. 24/3799 useless extension candidates. Maximal degree in co-relation 28141. Up to 3271 conditions per place. [2023-08-31 01:18:43,788 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 438 selfloop transitions, 114 changer transitions 5/557 dead transitions. [2023-08-31 01:18:43,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 557 transitions, 12420 flow [2023-08-31 01:18:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:18:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:18:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2332 transitions. [2023-08-31 01:18:43,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-31 01:18:43,791 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2332 transitions. [2023-08-31 01:18:43,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2332 transitions. [2023-08-31 01:18:43,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:43,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2332 transitions. [2023-08-31 01:18:43,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.0) internal successors, (2332), 11 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,802 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:43,802 INFO L175 Difference]: Start difference. First operand has 292 places, 518 transitions, 10716 flow. Second operand 11 states and 2332 transitions. [2023-08-31 01:18:43,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 557 transitions, 12420 flow [2023-08-31 01:18:44,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 557 transitions, 12221 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-08-31 01:18:44,297 INFO L231 Difference]: Finished difference. Result has 297 places, 530 transitions, 11174 flow [2023-08-31 01:18:44,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10487, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11174, PETRI_PLACES=297, PETRI_TRANSITIONS=530} [2023-08-31 01:18:44,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-08-31 01:18:44,298 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 530 transitions, 11174 flow [2023-08-31 01:18:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 209.27777777777777) internal successors, (3767), 18 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:44,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:44,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:44,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:44,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 01:18:44,505 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:44,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash 202279714, now seen corresponding path program 22 times [2023-08-31 01:18:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534888707] [2023-08-31 01:18:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534888707] [2023-08-31 01:18:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534888707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:44,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324425987] [2023-08-31 01:18:44,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:18:44,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:44,918 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:18:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 01:18:45,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:18:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:18:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:45,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-08-31 01:18:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:45,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:45,556 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 01:18:45,556 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 40 treesize of output 19 [2023-08-31 01:18:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324425987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:45,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-31 01:18:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100245221] [2023-08-31 01:18:45,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:18:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:18:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:18:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:18:46,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 530 transitions, 11174 flow. Second operand has 17 states, 17 states have (on average 209.2941176470588) internal successors, (3558), 17 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:46,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:46,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:18:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:47,600 INFO L130 PetriNetUnfolder]: 1772/3925 cut-off events. [2023-08-31 01:18:47,600 INFO L131 PetriNetUnfolder]: For 60235/60235 co-relation queries the response was YES. [2023-08-31 01:18:47,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29498 conditions, 3925 events. 1772/3925 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32314 event pairs, 82 based on Foata normal form. 24/3949 useless extension candidates. Maximal degree in co-relation 29385. Up to 1276 conditions per place. [2023-08-31 01:18:47,637 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 317 selfloop transitions, 289 changer transitions 3/609 dead transitions. [2023-08-31 01:18:47,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 609 transitions, 13470 flow [2023-08-31 01:18:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:18:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:18:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2557 transitions. [2023-08-31 01:18:47,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791518386714116 [2023-08-31 01:18:47,639 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2557 transitions. [2023-08-31 01:18:47,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2557 transitions. [2023-08-31 01:18:47,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:47,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2557 transitions. [2023-08-31 01:18:47,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.08333333333334) internal successors, (2557), 12 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:47,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:47,644 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:47,644 INFO L175 Difference]: Start difference. First operand has 297 places, 530 transitions, 11174 flow. Second operand 12 states and 2557 transitions. [2023-08-31 01:18:47,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 609 transitions, 13470 flow [2023-08-31 01:18:48,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 609 transitions, 13209 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-08-31 01:18:48,139 INFO L231 Difference]: Finished difference. Result has 300 places, 551 transitions, 12098 flow [2023-08-31 01:18:48,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12098, PETRI_PLACES=300, PETRI_TRANSITIONS=551} [2023-08-31 01:18:48,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-08-31 01:18:48,139 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 551 transitions, 12098 flow [2023-08-31 01:18:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.2941176470588) internal successors, (3558), 17 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:48,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:48,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:48,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:48,341 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,SelfDestructingSolverStorable38 [2023-08-31 01:18:48,341 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:48,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash 222542276, now seen corresponding path program 23 times [2023-08-31 01:18:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864587642] [2023-08-31 01:18:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:48,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864587642] [2023-08-31 01:18:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864587642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64296666] [2023-08-31 01:18:48,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:18:48,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:48,710 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) [2023-08-31 01:18:48,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 01:18:48,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:18:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 01:18:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:49,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-31 01:18:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:49,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:49,435 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 44 treesize of output 28 [2023-08-31 01:18:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64296666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:49,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:49,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-31 01:18:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244078463] [2023-08-31 01:18:49,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:49,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:18:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:18:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:18:50,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:18:50,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 551 transitions, 12098 flow. Second operand has 19 states, 19 states have (on average 208.05263157894737) internal successors, (3953), 19 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:50,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:50,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:18:50,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:52,538 INFO L130 PetriNetUnfolder]: 1778/3935 cut-off events. [2023-08-31 01:18:52,538 INFO L131 PetriNetUnfolder]: For 64668/64668 co-relation queries the response was YES. [2023-08-31 01:18:52,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3935 events. 1778/3935 cut-off events. For 64668/64668 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32581 event pairs, 38 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 30391. Up to 948 conditions per place. [2023-08-31 01:18:52,575 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 338 selfloop transitions, 315 changer transitions 0/653 dead transitions. [2023-08-31 01:18:52,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 14610 flow [2023-08-31 01:18:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 01:18:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 01:18:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5272 transitions. [2023-08-31 01:18:52,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523131672597865 [2023-08-31 01:18:52,579 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5272 transitions. [2023-08-31 01:18:52,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5272 transitions. [2023-08-31 01:18:52,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:52,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5272 transitions. [2023-08-31 01:18:52,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 210.88) internal successors, (5272), 25 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:52,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:52,593 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:52,594 INFO L175 Difference]: Start difference. First operand has 300 places, 551 transitions, 12098 flow. Second operand 25 states and 5272 transitions. [2023-08-31 01:18:52,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 14610 flow [2023-08-31 01:18:53,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 653 transitions, 14329 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-08-31 01:18:53,259 INFO L231 Difference]: Finished difference. Result has 323 places, 577 transitions, 13320 flow [2023-08-31 01:18:53,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13320, PETRI_PLACES=323, PETRI_TRANSITIONS=577} [2023-08-31 01:18:53,261 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-08-31 01:18:53,261 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 577 transitions, 13320 flow [2023-08-31 01:18:53,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 208.05263157894737) internal successors, (3953), 19 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:53,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:53,262 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:53,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 01:18:53,467 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,SelfDestructingSolverStorable39 [2023-08-31 01:18:53,467 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:53,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -632764378, now seen corresponding path program 24 times [2023-08-31 01:18:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746220329] [2023-08-31 01:18:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:53,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:53,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746220329] [2023-08-31 01:18:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746220329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:53,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632737801] [2023-08-31 01:18:53,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:18:53,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:53,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:53,777 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) [2023-08-31 01:18:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 01:18:53,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:18:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:18:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:18:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:54,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-31 01:18:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:54,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:54,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:54,379 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 44 treesize of output 28 [2023-08-31 01:18:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:54,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632737801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:54,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:54,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:18:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741333950] [2023-08-31 01:18:54,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:54,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:18:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:18:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:18:54,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:18:54,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 577 transitions, 13320 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:54,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:54,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:18:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:18:56,204 INFO L130 PetriNetUnfolder]: 1766/3855 cut-off events. [2023-08-31 01:18:56,205 INFO L131 PetriNetUnfolder]: For 68093/68093 co-relation queries the response was YES. [2023-08-31 01:18:56,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 3855 events. 1766/3855 cut-off events. For 68093/68093 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31320 event pairs, 74 based on Foata normal form. 20/3875 useless extension candidates. Maximal degree in co-relation 31527. Up to 2058 conditions per place. [2023-08-31 01:18:56,246 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 387 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2023-08-31 01:18:56,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 604 transitions, 14747 flow [2023-08-31 01:18:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:18:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:18:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2116 transitions. [2023-08-31 01:18:56,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37651245551601425 [2023-08-31 01:18:56,249 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2116 transitions. [2023-08-31 01:18:56,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2116 transitions. [2023-08-31 01:18:56,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:18:56,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2116 transitions. [2023-08-31 01:18:56,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.6) internal successors, (2116), 10 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:56,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:56,253 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:56,253 INFO L175 Difference]: Start difference. First operand has 323 places, 577 transitions, 13320 flow. Second operand 10 states and 2116 transitions. [2023-08-31 01:18:56,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 604 transitions, 14747 flow [2023-08-31 01:18:57,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 604 transitions, 13886 flow, removed 159 selfloop flow, removed 23 redundant places. [2023-08-31 01:18:57,045 INFO L231 Difference]: Finished difference. Result has 308 places, 573 transitions, 12912 flow [2023-08-31 01:18:57,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12912, PETRI_PLACES=308, PETRI_TRANSITIONS=573} [2023-08-31 01:18:57,045 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-08-31 01:18:57,046 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 573 transitions, 12912 flow [2023-08-31 01:18:57,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:57,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:18:57,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:18:57,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 01:18:57,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:57,247 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:18:57,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:18:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 937006002, now seen corresponding path program 25 times [2023-08-31 01:18:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:18:57,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353092924] [2023-08-31 01:18:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:18:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:18:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:18:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:18:57,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353092924] [2023-08-31 01:18:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353092924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:18:57,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311180828] [2023-08-31 01:18:57,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:18:57,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:18:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:18:57,793 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) [2023-08-31 01:18:57,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 01:18:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:18:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:18:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:18:58,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 65 [2023-08-31 01:18:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:18:58,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:18:58,415 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 62 treesize of output 38 [2023-08-31 01:18:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:18:58,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311180828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:18:58,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:18:58,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 21 [2023-08-31 01:18:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932068103] [2023-08-31 01:18:58,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:18:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:18:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:18:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:18:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:18:59,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 562 [2023-08-31 01:18:59,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 573 transitions, 12912 flow. Second operand has 21 states, 21 states have (on average 202.0) internal successors, (4242), 21 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:18:59,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:18:59,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 562 [2023-08-31 01:18:59,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:00,910 INFO L130 PetriNetUnfolder]: 1786/3867 cut-off events. [2023-08-31 01:19:00,911 INFO L131 PetriNetUnfolder]: For 66159/66159 co-relation queries the response was YES. [2023-08-31 01:19:00,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31108 conditions, 3867 events. 1786/3867 cut-off events. For 66159/66159 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31135 event pairs, 349 based on Foata normal form. 24/3891 useless extension candidates. Maximal degree in co-relation 31001. Up to 1532 conditions per place. [2023-08-31 01:19:00,949 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 386 selfloop transitions, 221 changer transitions 1/608 dead transitions. [2023-08-31 01:19:00,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 608 transitions, 14493 flow [2023-08-31 01:19:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:19:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:19:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2659 transitions. [2023-08-31 01:19:00,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394744045989597 [2023-08-31 01:19:00,952 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2659 transitions. [2023-08-31 01:19:00,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2659 transitions. [2023-08-31 01:19:00,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:00,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2659 transitions. [2023-08-31 01:19:00,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 204.53846153846155) internal successors, (2659), 13 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:00,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:00,959 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:00,960 INFO L175 Difference]: Start difference. First operand has 308 places, 573 transitions, 12912 flow. Second operand 13 states and 2659 transitions. [2023-08-31 01:19:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 608 transitions, 14493 flow [2023-08-31 01:19:01,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 608 transitions, 14062 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-31 01:19:01,539 INFO L231 Difference]: Finished difference. Result has 313 places, 577 transitions, 13031 flow [2023-08-31 01:19:01,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12421, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13031, PETRI_PLACES=313, PETRI_TRANSITIONS=577} [2023-08-31 01:19:01,539 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-08-31 01:19:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 577 transitions, 13031 flow [2023-08-31 01:19:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 202.0) internal successors, (4242), 21 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:01,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:01,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:01,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-31 01:19:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:01,741 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:01,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1238315755, now seen corresponding path program 26 times [2023-08-31 01:19:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:01,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791249376] [2023-08-31 01:19:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:02,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791249376] [2023-08-31 01:19:02,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791249376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:02,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005126763] [2023-08-31 01:19:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:19:02,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:02,053 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) [2023-08-31 01:19:02,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 01:19:02,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:19:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:19:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:02,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-31 01:19:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:02,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:02,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:02,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 55 [2023-08-31 01:19:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005126763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:02,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:02,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:19:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115424613] [2023-08-31 01:19:02,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:19:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:19:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:19:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:19:03,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 577 transitions, 13031 flow. Second operand has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:03,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:03,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:19:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:04,533 INFO L130 PetriNetUnfolder]: 1774/3823 cut-off events. [2023-08-31 01:19:04,533 INFO L131 PetriNetUnfolder]: For 68701/68701 co-relation queries the response was YES. [2023-08-31 01:19:04,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30936 conditions, 3823 events. 1774/3823 cut-off events. For 68701/68701 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30611 event pairs, 749 based on Foata normal form. 4/3827 useless extension candidates. Maximal degree in co-relation 30827. Up to 3467 conditions per place. [2023-08-31 01:19:04,567 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 499 selfloop transitions, 92 changer transitions 0/591 dead transitions. [2023-08-31 01:19:04,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 591 transitions, 14198 flow [2023-08-31 01:19:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:19:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:19:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2111 transitions. [2023-08-31 01:19:04,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37562277580071174 [2023-08-31 01:19:04,569 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2111 transitions. [2023-08-31 01:19:04,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2111 transitions. [2023-08-31 01:19:04,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:04,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2111 transitions. [2023-08-31 01:19:04,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.1) internal successors, (2111), 10 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:04,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:04,573 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:04,573 INFO L175 Difference]: Start difference. First operand has 313 places, 577 transitions, 13031 flow. Second operand 10 states and 2111 transitions. [2023-08-31 01:19:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 591 transitions, 14198 flow [2023-08-31 01:19:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 591 transitions, 13948 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-31 01:19:05,037 INFO L231 Difference]: Finished difference. Result has 311 places, 573 transitions, 12880 flow [2023-08-31 01:19:05,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12696, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12880, PETRI_PLACES=311, PETRI_TRANSITIONS=573} [2023-08-31 01:19:05,037 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-08-31 01:19:05,038 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 573 transitions, 12880 flow [2023-08-31 01:19:05,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.05555555555554) internal successors, (3745), 18 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:05,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:05,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:05,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:05,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:05,239 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:05,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash 852990556, now seen corresponding path program 27 times [2023-08-31 01:19:05,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:05,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545943194] [2023-08-31 01:19:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:05,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:05,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545943194] [2023-08-31 01:19:05,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545943194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:05,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215320810] [2023-08-31 01:19:05,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:19:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:05,641 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) [2023-08-31 01:19:05,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 01:19:05,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:19:05,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:19:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:06,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-31 01:19:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:06,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:06,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:06,302 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 65 treesize of output 41 [2023-08-31 01:19:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215320810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:06,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:06,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-31 01:19:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461207737] [2023-08-31 01:19:06,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:06,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:19:06,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:19:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:19:07,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:19:07,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 573 transitions, 12880 flow. Second operand has 20 states, 20 states have (on average 209.15) internal successors, (4183), 20 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:07,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:07,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:19:07,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:08,165 INFO L130 PetriNetUnfolder]: 1766/3759 cut-off events. [2023-08-31 01:19:08,165 INFO L131 PetriNetUnfolder]: For 66182/66182 co-relation queries the response was YES. [2023-08-31 01:19:08,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30583 conditions, 3759 events. 1766/3759 cut-off events. For 66182/66182 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29660 event pairs, 711 based on Foata normal form. 16/3775 useless extension candidates. Maximal degree in co-relation 30475. Up to 3341 conditions per place. [2023-08-31 01:19:08,202 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 470 selfloop transitions, 116 changer transitions 0/586 dead transitions. [2023-08-31 01:19:08,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 586 transitions, 14088 flow [2023-08-31 01:19:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:19:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:19:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2117 transitions. [2023-08-31 01:19:08,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669039145907474 [2023-08-31 01:19:08,204 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2117 transitions. [2023-08-31 01:19:08,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2117 transitions. [2023-08-31 01:19:08,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:08,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2117 transitions. [2023-08-31 01:19:08,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.7) internal successors, (2117), 10 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:08,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:08,209 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:08,209 INFO L175 Difference]: Start difference. First operand has 311 places, 573 transitions, 12880 flow. Second operand 10 states and 2117 transitions. [2023-08-31 01:19:08,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 586 transitions, 14088 flow [2023-08-31 01:19:08,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 13896 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-31 01:19:08,726 INFO L231 Difference]: Finished difference. Result has 310 places, 569 transitions, 12806 flow [2023-08-31 01:19:08,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12415, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12806, PETRI_PLACES=310, PETRI_TRANSITIONS=569} [2023-08-31 01:19:08,727 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2023-08-31 01:19:08,727 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 569 transitions, 12806 flow [2023-08-31 01:19:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 209.15) internal successors, (4183), 20 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:08,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:08,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:08,928 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,SelfDestructingSolverStorable43 [2023-08-31 01:19:08,928 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:08,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1108262019, now seen corresponding path program 28 times [2023-08-31 01:19:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:08,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211668207] [2023-08-31 01:19:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:08,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:19:09,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211668207] [2023-08-31 01:19:09,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211668207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713110057] [2023-08-31 01:19:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:19:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:09,468 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) [2023-08-31 01:19:09,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 01:19:09,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:19:09,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:19:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:09,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-31 01:19:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:09,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:10,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:10,166 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 117 treesize of output 69 [2023-08-31 01:19:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:10,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713110057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:10,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:10,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-08-31 01:19:10,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239201175] [2023-08-31 01:19:10,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:10,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:19:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:19:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:19:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-31 01:19:11,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 569 transitions, 12806 flow. Second operand has 24 states, 24 states have (on average 202.83333333333334) internal successors, (4868), 24 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:11,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:11,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-31 01:19:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:12,733 INFO L130 PetriNetUnfolder]: 1740/3681 cut-off events. [2023-08-31 01:19:12,734 INFO L131 PetriNetUnfolder]: For 64024/64024 co-relation queries the response was YES. [2023-08-31 01:19:12,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 3681 events. 1740/3681 cut-off events. For 64024/64024 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28827 event pairs, 476 based on Foata normal form. 12/3693 useless extension candidates. Maximal degree in co-relation 30173. Up to 2305 conditions per place. [2023-08-31 01:19:12,772 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 423 selfloop transitions, 175 changer transitions 3/601 dead transitions. [2023-08-31 01:19:12,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 601 transitions, 14190 flow [2023-08-31 01:19:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:19:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:19:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2683 transitions. [2023-08-31 01:19:12,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672324117163975 [2023-08-31 01:19:12,775 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2683 transitions. [2023-08-31 01:19:12,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2683 transitions. [2023-08-31 01:19:12,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:12,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2683 transitions. [2023-08-31 01:19:12,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:12,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:12,783 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:12,783 INFO L175 Difference]: Start difference. First operand has 310 places, 569 transitions, 12806 flow. Second operand 13 states and 2683 transitions. [2023-08-31 01:19:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 601 transitions, 14190 flow [2023-08-31 01:19:13,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 601 transitions, 13788 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-08-31 01:19:13,307 INFO L231 Difference]: Finished difference. Result has 312 places, 563 transitions, 12673 flow [2023-08-31 01:19:13,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12673, PETRI_PLACES=312, PETRI_TRANSITIONS=563} [2023-08-31 01:19:13,307 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-08-31 01:19:13,307 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 563 transitions, 12673 flow [2023-08-31 01:19:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 202.83333333333334) internal successors, (4868), 24 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:13,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:13,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:13,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:13,509 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1110045957, now seen corresponding path program 29 times [2023-08-31 01:19:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997808521] [2023-08-31 01:19:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997808521] [2023-08-31 01:19:13,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997808521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554875394] [2023-08-31 01:19:13,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:19:13,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:13,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:13,911 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) [2023-08-31 01:19:13,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 01:19:14,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:19:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:19:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:14,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-08-31 01:19:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:14,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:14,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:14,542 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 117 treesize of output 69 [2023-08-31 01:19:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554875394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:14,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:14,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-31 01:19:14,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4552952] [2023-08-31 01:19:14,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:14,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:19:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:19:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:19:15,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:19:15,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 563 transitions, 12673 flow. Second operand has 20 states, 20 states have (on average 208.15) internal successors, (4163), 20 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:15,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:15,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:19:15,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:16,898 INFO L130 PetriNetUnfolder]: 1726/3631 cut-off events. [2023-08-31 01:19:16,898 INFO L131 PetriNetUnfolder]: For 62873/62873 co-relation queries the response was YES. [2023-08-31 01:19:16,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 3631 events. 1726/3631 cut-off events. For 62873/62873 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28132 event pairs, 356 based on Foata normal form. 12/3643 useless extension candidates. Maximal degree in co-relation 29803. Up to 1996 conditions per place. [2023-08-31 01:19:16,928 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 365 selfloop transitions, 238 changer transitions 0/603 dead transitions. [2023-08-31 01:19:16,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 603 transitions, 14026 flow [2023-08-31 01:19:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:19:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:19:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2758 transitions. [2023-08-31 01:19:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774979468929647 [2023-08-31 01:19:16,930 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2758 transitions. [2023-08-31 01:19:16,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2758 transitions. [2023-08-31 01:19:16,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:16,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2758 transitions. [2023-08-31 01:19:16,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.15384615384616) internal successors, (2758), 13 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:16,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:16,935 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:16,935 INFO L175 Difference]: Start difference. First operand has 312 places, 563 transitions, 12673 flow. Second operand 13 states and 2758 transitions. [2023-08-31 01:19:16,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 603 transitions, 14026 flow [2023-08-31 01:19:17,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 603 transitions, 13764 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-08-31 01:19:17,484 INFO L231 Difference]: Finished difference. Result has 309 places, 563 transitions, 12999 flow [2023-08-31 01:19:17,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12349, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12999, PETRI_PLACES=309, PETRI_TRANSITIONS=563} [2023-08-31 01:19:17,485 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-31 01:19:17,485 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 563 transitions, 12999 flow [2023-08-31 01:19:17,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 208.15) internal successors, (4163), 20 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:17,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:17,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:17,692 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:17,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2082779586, now seen corresponding path program 30 times [2023-08-31 01:19:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726821804] [2023-08-31 01:19:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:18,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726821804] [2023-08-31 01:19:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726821804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358151496] [2023-08-31 01:19:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:19:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:18,006 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) [2023-08-31 01:19:18,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 01:19:18,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:19:18,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:19:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:18,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-08-31 01:19:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:18,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:18,597 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 117 treesize of output 61 [2023-08-31 01:19:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358151496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:18,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:19:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508096190] [2023-08-31 01:19:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:18,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:19:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:19:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:19:19,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:19:19,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 563 transitions, 12999 flow. Second operand has 18 states, 18 states have (on average 209.22222222222223) internal successors, (3766), 18 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:19,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:19,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:19:19,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:20,316 INFO L130 PetriNetUnfolder]: 1694/3559 cut-off events. [2023-08-31 01:19:20,316 INFO L131 PetriNetUnfolder]: For 64012/64012 co-relation queries the response was YES. [2023-08-31 01:19:20,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30097 conditions, 3559 events. 1694/3559 cut-off events. For 64012/64012 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27375 event pairs, 434 based on Foata normal form. 8/3567 useless extension candidates. Maximal degree in co-relation 29993. Up to 2492 conditions per place. [2023-08-31 01:19:20,349 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 368 selfloop transitions, 207 changer transitions 10/585 dead transitions. [2023-08-31 01:19:20,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 585 transitions, 14226 flow [2023-08-31 01:19:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:19:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:19:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2334 transitions. [2023-08-31 01:19:20,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37754771918472985 [2023-08-31 01:19:20,351 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2334 transitions. [2023-08-31 01:19:20,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2334 transitions. [2023-08-31 01:19:20,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:20,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2334 transitions. [2023-08-31 01:19:20,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.1818181818182) internal successors, (2334), 11 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:20,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:20,355 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:20,355 INFO L175 Difference]: Start difference. First operand has 309 places, 563 transitions, 12999 flow. Second operand 11 states and 2334 transitions. [2023-08-31 01:19:20,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 585 transitions, 14226 flow [2023-08-31 01:19:20,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 585 transitions, 13933 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-31 01:19:20,835 INFO L231 Difference]: Finished difference. Result has 309 places, 556 transitions, 12982 flow [2023-08-31 01:19:20,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12642, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12982, PETRI_PLACES=309, PETRI_TRANSITIONS=556} [2023-08-31 01:19:20,836 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-31 01:19:20,836 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 556 transitions, 12982 flow [2023-08-31 01:19:20,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 209.22222222222223) internal successors, (3766), 18 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:20,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:20,837 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:21,037 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,SelfDestructingSolverStorable46 [2023-08-31 01:19:21,037 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:21,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash 452270500, now seen corresponding path program 31 times [2023-08-31 01:19:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777869956] [2023-08-31 01:19:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:21,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777869956] [2023-08-31 01:19:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777869956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457800517] [2023-08-31 01:19:21,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:19:21,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:21,405 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) [2023-08-31 01:19:21,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 01:19:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:19:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:21,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-08-31 01:19:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:22,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:22,138 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 44 treesize of output 28 [2023-08-31 01:19:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457800517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:22,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-31 01:19:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904018760] [2023-08-31 01:19:22,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:22,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:19:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:19:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:19:23,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 562 [2023-08-31 01:19:23,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 556 transitions, 12982 flow. Second operand has 21 states, 21 states have (on average 209.28571428571428) internal successors, (4395), 21 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:23,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:23,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 562 [2023-08-31 01:19:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:24,492 INFO L130 PetriNetUnfolder]: 1654/3463 cut-off events. [2023-08-31 01:19:24,492 INFO L131 PetriNetUnfolder]: For 64625/64625 co-relation queries the response was YES. [2023-08-31 01:19:24,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29571 conditions, 3463 events. 1654/3463 cut-off events. For 64625/64625 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26384 event pairs, 62 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 29467. Up to 1738 conditions per place. [2023-08-31 01:19:24,527 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 324 selfloop transitions, 253 changer transitions 5/582 dead transitions. [2023-08-31 01:19:24,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 582 transitions, 14247 flow [2023-08-31 01:19:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:19:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:19:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2756 transitions. [2023-08-31 01:19:24,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37722419928825623 [2023-08-31 01:19:24,529 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2756 transitions. [2023-08-31 01:19:24,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2756 transitions. [2023-08-31 01:19:24,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:24,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2756 transitions. [2023-08-31 01:19:24,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.0) internal successors, (2756), 13 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:24,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:24,536 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:24,536 INFO L175 Difference]: Start difference. First operand has 309 places, 556 transitions, 12982 flow. Second operand 13 states and 2756 transitions. [2023-08-31 01:19:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 582 transitions, 14247 flow [2023-08-31 01:19:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 582 transitions, 13806 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-31 01:19:25,001 INFO L231 Difference]: Finished difference. Result has 305 places, 549 transitions, 12897 flow [2023-08-31 01:19:25,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12897, PETRI_PLACES=305, PETRI_TRANSITIONS=549} [2023-08-31 01:19:25,002 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-08-31 01:19:25,002 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 549 transitions, 12897 flow [2023-08-31 01:19:25,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 209.28571428571428) internal successors, (4395), 21 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:25,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:25,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:25,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-31 01:19:25,203 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:25,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 216370355, now seen corresponding path program 32 times [2023-08-31 01:19:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:25,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563459960] [2023-08-31 01:19:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:25,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563459960] [2023-08-31 01:19:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563459960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974146781] [2023-08-31 01:19:25,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:19:25,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:25,513 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) [2023-08-31 01:19:25,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 01:19:25,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:19:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:19:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:25,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-31 01:19:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:25,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:26,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:26,164 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 65 treesize of output 41 [2023-08-31 01:19:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974146781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:26,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:26,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-31 01:19:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420324637] [2023-08-31 01:19:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:26,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:19:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:19:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:19:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:19:26,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 549 transitions, 12897 flow. Second operand has 19 states, 19 states have (on average 208.26315789473685) internal successors, (3957), 19 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:26,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:26,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:19:26,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:27,840 INFO L130 PetriNetUnfolder]: 1626/3339 cut-off events. [2023-08-31 01:19:27,840 INFO L131 PetriNetUnfolder]: For 67515/67515 co-relation queries the response was YES. [2023-08-31 01:19:27,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28946 conditions, 3339 events. 1626/3339 cut-off events. For 67515/67515 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24758 event pairs, 623 based on Foata normal form. 32/3371 useless extension candidates. Maximal degree in co-relation 28843. Up to 2977 conditions per place. [2023-08-31 01:19:27,874 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 457 selfloop transitions, 105 changer transitions 2/564 dead transitions. [2023-08-31 01:19:27,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 564 transitions, 14071 flow [2023-08-31 01:19:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:19:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:19:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1901 transitions. [2023-08-31 01:19:27,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37584025306445235 [2023-08-31 01:19:27,876 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1901 transitions. [2023-08-31 01:19:27,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1901 transitions. [2023-08-31 01:19:27,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:27,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1901 transitions. [2023-08-31 01:19:27,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.22222222222223) internal successors, (1901), 9 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:27,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:27,880 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:27,880 INFO L175 Difference]: Start difference. First operand has 305 places, 549 transitions, 12897 flow. Second operand 9 states and 1901 transitions. [2023-08-31 01:19:27,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 564 transitions, 14071 flow [2023-08-31 01:19:28,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 564 transitions, 13541 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-08-31 01:19:28,371 INFO L231 Difference]: Finished difference. Result has 293 places, 543 transitions, 12486 flow [2023-08-31 01:19:28,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12486, PETRI_PLACES=293, PETRI_TRANSITIONS=543} [2023-08-31 01:19:28,371 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-08-31 01:19:28,372 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 543 transitions, 12486 flow [2023-08-31 01:19:28,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 208.26315789473685) internal successors, (3957), 19 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:28,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:28,372 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:28,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:28,572 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,SelfDestructingSolverStorable48 [2023-08-31 01:19:28,573 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:28,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1781878825, now seen corresponding path program 33 times [2023-08-31 01:19:28,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:28,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182360112] [2023-08-31 01:19:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:28,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:28,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:28,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182360112] [2023-08-31 01:19:28,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182360112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:28,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198934662] [2023-08-31 01:19:28,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:19:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:28,969 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) [2023-08-31 01:19:28,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 01:19:29,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:19:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 01:19:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:19:29,299 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 52 treesize of output 48 [2023-08-31 01:19:29,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-31 01:19:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:29,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:29,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:29,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-08-31 01:19:29,662 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 43 treesize of output 41 [2023-08-31 01:19:29,665 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 41 treesize of output 39 [2023-08-31 01:19:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198934662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:29,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:29,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-31 01:19:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032595206] [2023-08-31 01:19:29,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 01:19:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 01:19:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2023-08-31 01:19:30,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-31 01:19:30,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 543 transitions, 12486 flow. Second operand has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:30,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:30,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-31 01:19:30,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:31,562 INFO L130 PetriNetUnfolder]: 1655/3366 cut-off events. [2023-08-31 01:19:31,562 INFO L131 PetriNetUnfolder]: For 64154/64154 co-relation queries the response was YES. [2023-08-31 01:19:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29115 conditions, 3366 events. 1655/3366 cut-off events. For 64154/64154 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24718 event pairs, 148 based on Foata normal form. 36/3402 useless extension candidates. Maximal degree in co-relation 29014. Up to 1308 conditions per place. [2023-08-31 01:19:31,592 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 234 selfloop transitions, 374 changer transitions 2/610 dead transitions. [2023-08-31 01:19:31,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 610 transitions, 14697 flow [2023-08-31 01:19:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:19:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:19:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2610 transitions. [2023-08-31 01:19:31,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33172343670564314 [2023-08-31 01:19:31,594 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2610 transitions. [2023-08-31 01:19:31,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2610 transitions. [2023-08-31 01:19:31,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:31,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2610 transitions. [2023-08-31 01:19:31,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.42857142857142) internal successors, (2610), 14 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) [2023-08-31 01:19:31,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:31,599 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:31,599 INFO L175 Difference]: Start difference. First operand has 293 places, 543 transitions, 12486 flow. Second operand 14 states and 2610 transitions. [2023-08-31 01:19:31,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 610 transitions, 14697 flow [2023-08-31 01:19:32,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 610 transitions, 14488 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 01:19:32,028 INFO L231 Difference]: Finished difference. Result has 301 places, 564 transitions, 13716 flow [2023-08-31 01:19:32,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12293, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13716, PETRI_PLACES=301, PETRI_TRANSITIONS=564} [2023-08-31 01:19:32,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-08-31 01:19:32,029 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 564 transitions, 13716 flow [2023-08-31 01:19:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:32,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:32,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:32,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-31 01:19:32,230 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:32,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1235969341, now seen corresponding path program 34 times [2023-08-31 01:19:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754475275] [2023-08-31 01:19:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:32,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:32,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754475275] [2023-08-31 01:19:32,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754475275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:32,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350432645] [2023-08-31 01:19:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:19:32,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:32,617 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) [2023-08-31 01:19:32,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 01:19:32,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:19:32,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 01:19:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:19:32,944 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 65 treesize of output 61 [2023-08-31 01:19:33,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-31 01:19:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:33,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:33,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:33,553 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 74 treesize of output 58 [2023-08-31 01:19:33,556 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 43 treesize of output 41 [2023-08-31 01:19:33,559 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 41 treesize of output 39 [2023-08-31 01:19:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:33,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350432645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:33,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:33,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:19:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649340208] [2023-08-31 01:19:33,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:19:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:19:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2023-08-31 01:19:35,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-31 01:19:35,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 564 transitions, 13716 flow. Second operand has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:35,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:35,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-31 01:19:35,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:36,817 INFO L130 PetriNetUnfolder]: 1686/3405 cut-off events. [2023-08-31 01:19:36,817 INFO L131 PetriNetUnfolder]: For 71604/71604 co-relation queries the response was YES. [2023-08-31 01:19:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 3405 events. 1686/3405 cut-off events. For 71604/71604 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24921 event pairs, 158 based on Foata normal form. 12/3417 useless extension candidates. Maximal degree in co-relation 30565. Up to 1814 conditions per place. [2023-08-31 01:19:36,853 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 293 selfloop transitions, 347 changer transitions 1/641 dead transitions. [2023-08-31 01:19:36,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 641 transitions, 15905 flow [2023-08-31 01:19:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:19:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:19:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3179 transitions. [2023-08-31 01:19:36,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33274021352313166 [2023-08-31 01:19:36,856 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3179 transitions. [2023-08-31 01:19:36,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3179 transitions. [2023-08-31 01:19:36,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:36,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3179 transitions. [2023-08-31 01:19:36,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:36,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:36,862 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:36,862 INFO L175 Difference]: Start difference. First operand has 301 places, 564 transitions, 13716 flow. Second operand 17 states and 3179 transitions. [2023-08-31 01:19:36,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 641 transitions, 15905 flow [2023-08-31 01:19:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 641 transitions, 15309 flow, removed 61 selfloop flow, removed 8 redundant places. [2023-08-31 01:19:37,394 INFO L231 Difference]: Finished difference. Result has 312 places, 576 transitions, 14264 flow [2023-08-31 01:19:37,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13129, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14264, PETRI_PLACES=312, PETRI_TRANSITIONS=576} [2023-08-31 01:19:37,395 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-08-31 01:19:37,395 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 576 transitions, 14264 flow [2023-08-31 01:19:37,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:37,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:37,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:37,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:37,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:37,596 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:37,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -935413069, now seen corresponding path program 35 times [2023-08-31 01:19:37,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:37,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410780999] [2023-08-31 01:19:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410780999] [2023-08-31 01:19:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410780999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266251557] [2023-08-31 01:19:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:19:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:38,162 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) [2023-08-31 01:19:38,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 01:19:38,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:19:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 01:19:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:19:38,486 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 65 treesize of output 61 [2023-08-31 01:19:38,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-08-31 01:19:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:38,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:38,990 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 74 treesize of output 58 [2023-08-31 01:19:38,992 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 43 treesize of output 41 [2023-08-31 01:19:38,995 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 41 treesize of output 39 [2023-08-31 01:19:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266251557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:39,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:39,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-31 01:19:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016484527] [2023-08-31 01:19:39,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:19:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:19:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2023-08-31 01:19:39,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-31 01:19:39,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 576 transitions, 14264 flow. Second operand has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:39,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:39,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-31 01:19:39,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:41,405 INFO L130 PetriNetUnfolder]: 1668/3343 cut-off events. [2023-08-31 01:19:41,405 INFO L131 PetriNetUnfolder]: For 72659/72659 co-relation queries the response was YES. [2023-08-31 01:19:41,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30366 conditions, 3343 events. 1668/3343 cut-off events. For 72659/72659 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24273 event pairs, 136 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 30262. Up to 1814 conditions per place. [2023-08-31 01:19:41,435 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 272 selfloop transitions, 339 changer transitions 2/613 dead transitions. [2023-08-31 01:19:41,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 613 transitions, 15667 flow [2023-08-31 01:19:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:19:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:19:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2615 transitions. [2023-08-31 01:19:41,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323589222165735 [2023-08-31 01:19:41,437 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2615 transitions. [2023-08-31 01:19:41,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2615 transitions. [2023-08-31 01:19:41,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:41,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2615 transitions. [2023-08-31 01:19:41,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.78571428571428) internal successors, (2615), 14 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:41,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:41,443 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:41,443 INFO L175 Difference]: Start difference. First operand has 312 places, 576 transitions, 14264 flow. Second operand 14 states and 2615 transitions. [2023-08-31 01:19:41,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 613 transitions, 15667 flow [2023-08-31 01:19:41,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 613 transitions, 15307 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-08-31 01:19:41,889 INFO L231 Difference]: Finished difference. Result has 311 places, 568 transitions, 14433 flow [2023-08-31 01:19:41,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13773, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14433, PETRI_PLACES=311, PETRI_TRANSITIONS=568} [2023-08-31 01:19:41,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-08-31 01:19:41,890 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 568 transitions, 14433 flow [2023-08-31 01:19:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:41,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:41,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:41,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:42,096 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,SelfDestructingSolverStorable51 [2023-08-31 01:19:42,097 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:42,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814978, now seen corresponding path program 36 times [2023-08-31 01:19:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:42,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922987524] [2023-08-31 01:19:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:42,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:42,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922987524] [2023-08-31 01:19:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922987524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:42,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511406785] [2023-08-31 01:19:42,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:19:42,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:42,553 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) [2023-08-31 01:19:42,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 01:19:42,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:19:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-31 01:19:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:19:42,869 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 52 treesize of output 48 [2023-08-31 01:19:43,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-08-31 01:19:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:43,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:43,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:19:43,415 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 107 treesize of output 75 [2023-08-31 01:19:43,419 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 19 treesize of output 15 [2023-08-31 01:19:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:43,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511406785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:43,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 01:19:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293453300] [2023-08-31 01:19:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:19:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:19:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2023-08-31 01:19:44,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-08-31 01:19:44,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 568 transitions, 14433 flow. Second operand has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:44,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:44,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-08-31 01:19:44,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:45,733 INFO L130 PetriNetUnfolder]: 1634/3265 cut-off events. [2023-08-31 01:19:45,733 INFO L131 PetriNetUnfolder]: For 78614/78614 co-relation queries the response was YES. [2023-08-31 01:19:45,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 3265 events. 1634/3265 cut-off events. For 78614/78614 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23440 event pairs, 187 based on Foata normal form. 8/3273 useless extension candidates. Maximal degree in co-relation 30090. Up to 1064 conditions per place. [2023-08-31 01:19:45,765 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 258 selfloop transitions, 339 changer transitions 11/608 dead transitions. [2023-08-31 01:19:45,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 608 transitions, 15993 flow [2023-08-31 01:19:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:19:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:19:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3517 transitions. [2023-08-31 01:19:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32936879565461696 [2023-08-31 01:19:45,768 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3517 transitions. [2023-08-31 01:19:45,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3517 transitions. [2023-08-31 01:19:45,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:45,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3517 transitions. [2023-08-31 01:19:45,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.10526315789474) internal successors, (3517), 19 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:45,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:45,774 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:45,774 INFO L175 Difference]: Start difference. First operand has 311 places, 568 transitions, 14433 flow. Second operand 19 states and 3517 transitions. [2023-08-31 01:19:45,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 608 transitions, 15993 flow [2023-08-31 01:19:46,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 608 transitions, 15316 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-31 01:19:46,198 INFO L231 Difference]: Finished difference. Result has 314 places, 571 transitions, 14482 flow [2023-08-31 01:19:46,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13698, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14482, PETRI_PLACES=314, PETRI_TRANSITIONS=571} [2023-08-31 01:19:46,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-08-31 01:19:46,199 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 571 transitions, 14482 flow [2023-08-31 01:19:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:46,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:46,200 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:46,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 01:19:46,400 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,SelfDestructingSolverStorable52 [2023-08-31 01:19:46,400 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:46,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash -479361748, now seen corresponding path program 37 times [2023-08-31 01:19:46,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:46,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744640073] [2023-08-31 01:19:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:19:46,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:46,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744640073] [2023-08-31 01:19:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744640073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:19:46,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:19:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:19:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19987149] [2023-08-31 01:19:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:19:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 01:19:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 01:19:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 01:19:46,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 562 [2023-08-31 01:19:46,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 571 transitions, 14482 flow. Second operand has 6 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:46,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:46,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 562 [2023-08-31 01:19:46,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:46,859 INFO L130 PetriNetUnfolder]: 819/1624 cut-off events. [2023-08-31 01:19:46,859 INFO L131 PetriNetUnfolder]: For 39054/39054 co-relation queries the response was YES. [2023-08-31 01:19:46,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15255 conditions, 1624 events. 819/1624 cut-off events. For 39054/39054 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9899 event pairs, 350 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 15158. Up to 1621 conditions per place. [2023-08-31 01:19:46,874 INFO L137 encePairwiseOnDemand]: 560/562 looper letters, 348 selfloop transitions, 4 changer transitions 0/352 dead transitions. [2023-08-31 01:19:46,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 9011 flow [2023-08-31 01:19:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:19:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:19:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1430 transitions. [2023-08-31 01:19:46,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408066429418745 [2023-08-31 01:19:46,876 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1430 transitions. [2023-08-31 01:19:46,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1430 transitions. [2023-08-31 01:19:46,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:46,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1430 transitions. [2023-08-31 01:19:46,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:46,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:46,878 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:46,879 INFO L175 Difference]: Start difference. First operand has 314 places, 571 transitions, 14482 flow. Second operand 6 states and 1430 transitions. [2023-08-31 01:19:46,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 9011 flow [2023-08-31 01:19:47,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 352 transitions, 7835 flow, removed 15 selfloop flow, removed 34 redundant places. [2023-08-31 01:19:47,030 INFO L231 Difference]: Finished difference. Result has 261 places, 352 transitions, 7139 flow [2023-08-31 01:19:47,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7139, PETRI_PLACES=261, PETRI_TRANSITIONS=352} [2023-08-31 01:19:47,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-31 01:19:47,031 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 352 transitions, 7139 flow [2023-08-31 01:19:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:47,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:47,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-31 01:19:47,031 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:19:47,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:19:47,031 INFO L85 PathProgramCache]: Analyzing trace with hash -678092971, now seen corresponding path program 38 times [2023-08-31 01:19:47,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:19:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618010605] [2023-08-31 01:19:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:19:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:19:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:19:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:19:48,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:19:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618010605] [2023-08-31 01:19:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618010605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:19:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695957288] [2023-08-31 01:19:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:19:48,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:19:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:19:48,125 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) [2023-08-31 01:19:48,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 01:19:48,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:19:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:19:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:19:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:19:48,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 86 [2023-08-31 01:19:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:19:50,137 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 01:19:50,137 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 242 treesize of output 141 [2023-08-31 01:19:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:19:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695957288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:19:50,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:19:50,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:19:50,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051028508] [2023-08-31 01:19:50,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:19:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:19:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:19:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:19:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:19:53,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-31 01:19:53,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 352 transitions, 7139 flow. Second operand has 32 states, 32 states have (on average 186.71875) internal successors, (5975), 32 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:53,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:19:53,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-31 01:19:53,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:19:59,580 INFO L130 PetriNetUnfolder]: 1391/2887 cut-off events. [2023-08-31 01:19:59,580 INFO L131 PetriNetUnfolder]: For 54196/54196 co-relation queries the response was YES. [2023-08-31 01:19:59,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 2887 events. 1391/2887 cut-off events. For 54196/54196 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20997 event pairs, 52 based on Foata normal form. 26/2913 useless extension candidates. Maximal degree in co-relation 23717. Up to 739 conditions per place. [2023-08-31 01:19:59,606 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 233 selfloop transitions, 362 changer transitions 64/659 dead transitions. [2023-08-31 01:19:59,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 659 transitions, 13609 flow [2023-08-31 01:19:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 01:19:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 01:19:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 7953 transitions. [2023-08-31 01:19:59,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336934417895272 [2023-08-31 01:19:59,611 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 7953 transitions. [2023-08-31 01:19:59,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 7953 transitions. [2023-08-31 01:19:59,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:19:59,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 7953 transitions. [2023-08-31 01:19:59,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 189.35714285714286) internal successors, (7953), 42 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:59,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:59,628 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:59,629 INFO L175 Difference]: Start difference. First operand has 261 places, 352 transitions, 7139 flow. Second operand 42 states and 7953 transitions. [2023-08-31 01:19:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 659 transitions, 13609 flow [2023-08-31 01:19:59,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 659 transitions, 13602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:19:59,923 INFO L231 Difference]: Finished difference. Result has 307 places, 480 transitions, 10528 flow [2023-08-31 01:19:59,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10528, PETRI_PLACES=307, PETRI_TRANSITIONS=480} [2023-08-31 01:19:59,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-08-31 01:19:59,924 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 480 transitions, 10528 flow [2023-08-31 01:19:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.71875) internal successors, (5975), 32 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:19:59,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:19:59,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:19:59,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:00,125 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,SelfDestructingSolverStorable54 [2023-08-31 01:20:00,125 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:00,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1882165963, now seen corresponding path program 39 times [2023-08-31 01:20:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:00,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934543474] [2023-08-31 01:20:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:01,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934543474] [2023-08-31 01:20:01,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934543474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:01,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810859489] [2023-08-31 01:20:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:20:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:01,297 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) [2023-08-31 01:20:01,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 01:20:01,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:20:01,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:01,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 01:20:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:02,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:02,049 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 138 treesize of output 86 [2023-08-31 01:20:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:04,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:04,791 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 277 treesize of output 175 [2023-08-31 01:20:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810859489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:04,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:04,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-31 01:20:04,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549690933] [2023-08-31 01:20:04,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:04,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:20:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:20:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:20:07,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:20:07,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 480 transitions, 10528 flow. Second operand has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:07,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:07,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:20:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:11,322 INFO L130 PetriNetUnfolder]: 1660/3203 cut-off events. [2023-08-31 01:20:11,322 INFO L131 PetriNetUnfolder]: For 68685/68685 co-relation queries the response was YES. [2023-08-31 01:20:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 3203 events. 1660/3203 cut-off events. For 68685/68685 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22163 event pairs, 176 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 28536. Up to 853 conditions per place. [2023-08-31 01:20:11,352 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 336 selfloop transitions, 348 changer transitions 20/704 dead transitions. [2023-08-31 01:20:11,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 704 transitions, 15880 flow [2023-08-31 01:20:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:20:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:20:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4391 transitions. [2023-08-31 01:20:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35514396635393075 [2023-08-31 01:20:11,355 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4391 transitions. [2023-08-31 01:20:11,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4391 transitions. [2023-08-31 01:20:11,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:11,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4391 transitions. [2023-08-31 01:20:11,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.5909090909091) internal successors, (4391), 22 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:11,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:11,362 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:11,362 INFO L175 Difference]: Start difference. First operand has 307 places, 480 transitions, 10528 flow. Second operand 22 states and 4391 transitions. [2023-08-31 01:20:11,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 704 transitions, 15880 flow [2023-08-31 01:20:11,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 704 transitions, 14515 flow, removed 408 selfloop flow, removed 18 redundant places. [2023-08-31 01:20:11,724 INFO L231 Difference]: Finished difference. Result has 314 places, 591 transitions, 12655 flow [2023-08-31 01:20:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12655, PETRI_PLACES=314, PETRI_TRANSITIONS=591} [2023-08-31 01:20:11,725 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-08-31 01:20:11,726 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 591 transitions, 12655 flow [2023-08-31 01:20:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:11,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:11,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:11,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:11,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:11,932 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:11,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1575334059, now seen corresponding path program 40 times [2023-08-31 01:20:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:11,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963606319] [2023-08-31 01:20:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963606319] [2023-08-31 01:20:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963606319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263748222] [2023-08-31 01:20:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:20:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:12,642 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) [2023-08-31 01:20:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 01:20:12,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:20:12,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 01:20:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:13,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:13,848 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 155 treesize of output 99 [2023-08-31 01:20:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:15,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:15,648 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 215 treesize of output 143 [2023-08-31 01:20:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:15,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263748222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:15,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:15,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:20:15,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448793997] [2023-08-31 01:20:15,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:20:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:20:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:20:17,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:20:17,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 591 transitions, 12655 flow. Second operand has 27 states, 27 states have (on average 195.77777777777777) internal successors, (5286), 27 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:17,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:17,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:20:17,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:21,246 INFO L130 PetriNetUnfolder]: 1922/3702 cut-off events. [2023-08-31 01:20:21,246 INFO L131 PetriNetUnfolder]: For 80031/80031 co-relation queries the response was YES. [2023-08-31 01:20:21,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32012 conditions, 3702 events. 1922/3702 cut-off events. For 80031/80031 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26124 event pairs, 384 based on Foata normal form. 16/3718 useless extension candidates. Maximal degree in co-relation 31913. Up to 2091 conditions per place. [2023-08-31 01:20:21,280 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 472 selfloop transitions, 261 changer transitions 31/764 dead transitions. [2023-08-31 01:20:21,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 764 transitions, 16777 flow [2023-08-31 01:20:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:20:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:20:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6169 transitions. [2023-08-31 01:20:21,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3540925266903915 [2023-08-31 01:20:21,284 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6169 transitions. [2023-08-31 01:20:21,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6169 transitions. [2023-08-31 01:20:21,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:21,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6169 transitions. [2023-08-31 01:20:21,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 199.0) internal successors, (6169), 31 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:21,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:21,295 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:21,295 INFO L175 Difference]: Start difference. First operand has 314 places, 591 transitions, 12655 flow. Second operand 31 states and 6169 transitions. [2023-08-31 01:20:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 764 transitions, 16777 flow [2023-08-31 01:20:21,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 764 transitions, 16540 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-31 01:20:21,799 INFO L231 Difference]: Finished difference. Result has 344 places, 644 transitions, 14350 flow [2023-08-31 01:20:21,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12434, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14350, PETRI_PLACES=344, PETRI_TRANSITIONS=644} [2023-08-31 01:20:21,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2023-08-31 01:20:21,800 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 644 transitions, 14350 flow [2023-08-31 01:20:21,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.77777777777777) internal successors, (5286), 27 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:21,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:21,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:21,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:22,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:22,001 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:22,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1317900205, now seen corresponding path program 41 times [2023-08-31 01:20:22,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:22,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534435199] [2023-08-31 01:20:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:22,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:22,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534435199] [2023-08-31 01:20:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534435199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786882661] [2023-08-31 01:20:22,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:20:22,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:22,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:22,631 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) [2023-08-31 01:20:22,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-31 01:20:22,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:20:22,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:22,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 01:20:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:23,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2023-08-31 01:20:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:24,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:24,900 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 313 treesize of output 191 [2023-08-31 01:20:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:25,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786882661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:25,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:25,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:20:25,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528767917] [2023-08-31 01:20:25,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:20:25,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:20:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:20:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:20:26,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 644 transitions, 14350 flow. Second operand has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:26,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:26,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:20:26,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:33,313 INFO L130 PetriNetUnfolder]: 2148/4255 cut-off events. [2023-08-31 01:20:33,313 INFO L131 PetriNetUnfolder]: For 97863/97863 co-relation queries the response was YES. [2023-08-31 01:20:33,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4255 events. 2148/4255 cut-off events. For 97863/97863 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31657 event pairs, 106 based on Foata normal form. 15/4270 useless extension candidates. Maximal degree in co-relation 37715. Up to 1142 conditions per place. [2023-08-31 01:20:33,358 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 499 selfloop transitions, 426 changer transitions 35/960 dead transitions. [2023-08-31 01:20:33,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 960 transitions, 21428 flow [2023-08-31 01:20:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 01:20:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 01:20:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7198 transitions. [2023-08-31 01:20:33,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557730328192962 [2023-08-31 01:20:33,364 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7198 transitions. [2023-08-31 01:20:33,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7198 transitions. [2023-08-31 01:20:33,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:33,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7198 transitions. [2023-08-31 01:20:33,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 199.94444444444446) internal successors, (7198), 36 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:33,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:33,379 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:33,379 INFO L175 Difference]: Start difference. First operand has 344 places, 644 transitions, 14350 flow. Second operand 36 states and 7198 transitions. [2023-08-31 01:20:33,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 960 transitions, 21428 flow [2023-08-31 01:20:34,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 960 transitions, 20921 flow, removed 154 selfloop flow, removed 17 redundant places. [2023-08-31 01:20:34,251 INFO L231 Difference]: Finished difference. Result has 373 places, 732 transitions, 17052 flow [2023-08-31 01:20:34,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13983, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17052, PETRI_PLACES=373, PETRI_TRANSITIONS=732} [2023-08-31 01:20:34,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-08-31 01:20:34,252 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 732 transitions, 17052 flow [2023-08-31 01:20:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:34,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:34,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:34,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:34,453 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,SelfDestructingSolverStorable57 [2023-08-31 01:20:34,453 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:34,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash -256187255, now seen corresponding path program 42 times [2023-08-31 01:20:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604158695] [2023-08-31 01:20:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:34,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:35,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604158695] [2023-08-31 01:20:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604158695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:35,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960306422] [2023-08-31 01:20:35,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:20:35,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:35,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:35,434 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) [2023-08-31 01:20:35,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-31 01:20:35,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:20:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:20:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:36,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:36,237 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 159 treesize of output 99 [2023-08-31 01:20:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:36,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:38,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:38,359 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 224 treesize of output 154 [2023-08-31 01:20:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960306422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:38,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-31 01:20:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729129473] [2023-08-31 01:20:38,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:20:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:20:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:20:40,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:20:40,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 732 transitions, 17052 flow. Second operand has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:40,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:40,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:20:40,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:45,120 INFO L130 PetriNetUnfolder]: 2132/4198 cut-off events. [2023-08-31 01:20:45,120 INFO L131 PetriNetUnfolder]: For 105703/105703 co-relation queries the response was YES. [2023-08-31 01:20:45,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39218 conditions, 4198 events. 2132/4198 cut-off events. For 105703/105703 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30945 event pairs, 569 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 39100. Up to 3041 conditions per place. [2023-08-31 01:20:45,164 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 518 selfloop transitions, 268 changer transitions 19/805 dead transitions. [2023-08-31 01:20:45,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 805 transitions, 19399 flow [2023-08-31 01:20:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:20:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:20:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5556 transitions. [2023-08-31 01:20:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3530757498729029 [2023-08-31 01:20:45,167 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5556 transitions. [2023-08-31 01:20:45,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5556 transitions. [2023-08-31 01:20:45,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:45,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5556 transitions. [2023-08-31 01:20:45,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 198.42857142857142) internal successors, (5556), 28 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:45,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:45,177 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:45,177 INFO L175 Difference]: Start difference. First operand has 373 places, 732 transitions, 17052 flow. Second operand 28 states and 5556 transitions. [2023-08-31 01:20:45,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 805 transitions, 19399 flow [2023-08-31 01:20:45,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 805 transitions, 18560 flow, removed 126 selfloop flow, removed 19 redundant places. [2023-08-31 01:20:45,930 INFO L231 Difference]: Finished difference. Result has 383 places, 746 transitions, 17151 flow [2023-08-31 01:20:45,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16124, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17151, PETRI_PLACES=383, PETRI_TRANSITIONS=746} [2023-08-31 01:20:45,931 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 362 predicate places. [2023-08-31 01:20:45,931 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 746 transitions, 17151 flow [2023-08-31 01:20:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 195.78571428571428) internal successors, (5482), 28 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:45,932 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:45,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:46,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-31 01:20:46,132 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:46,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1775779559, now seen corresponding path program 43 times [2023-08-31 01:20:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102500649] [2023-08-31 01:20:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:46,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102500649] [2023-08-31 01:20:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102500649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655784225] [2023-08-31 01:20:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:20:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:46,854 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) [2023-08-31 01:20:46,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-31 01:20:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 01:20:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:20:47,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 126 [2023-08-31 01:20:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:47,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:20:49,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:20:49,086 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 338 treesize of output 218 [2023-08-31 01:20:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655784225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:20:49,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:20:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:20:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680751992] [2023-08-31 01:20:49,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:20:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:20:49,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:20:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:20:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:20:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:20:51,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 746 transitions, 17151 flow. Second operand has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:51,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:20:51,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:20:51,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:20:57,127 INFO L130 PetriNetUnfolder]: 2974/6191 cut-off events. [2023-08-31 01:20:57,127 INFO L131 PetriNetUnfolder]: For 150937/150937 co-relation queries the response was YES. [2023-08-31 01:20:57,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54568 conditions, 6191 events. 2974/6191 cut-off events. For 150937/150937 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 52105 event pairs, 302 based on Foata normal form. 53/6244 useless extension candidates. Maximal degree in co-relation 54451. Up to 1948 conditions per place. [2023-08-31 01:20:57,189 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 598 selfloop transitions, 643 changer transitions 62/1303 dead transitions. [2023-08-31 01:20:57,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1303 transitions, 30822 flow [2023-08-31 01:20:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 01:20:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 01:20:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7799 transitions. [2023-08-31 01:20:57,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3558262615202117 [2023-08-31 01:20:57,194 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7799 transitions. [2023-08-31 01:20:57,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7799 transitions. [2023-08-31 01:20:57,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:20:57,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7799 transitions. [2023-08-31 01:20:57,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 199.97435897435898) internal successors, (7799), 39 states have internal predecessors, (7799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:57,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:57,207 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:57,207 INFO L175 Difference]: Start difference. First operand has 383 places, 746 transitions, 17151 flow. Second operand 39 states and 7799 transitions. [2023-08-31 01:20:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1303 transitions, 30822 flow [2023-08-31 01:20:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1303 transitions, 30230 flow, removed 136 selfloop flow, removed 17 redundant places. [2023-08-31 01:20:58,630 INFO L231 Difference]: Finished difference. Result has 416 places, 1009 transitions, 24103 flow [2023-08-31 01:20:58,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16666, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24103, PETRI_PLACES=416, PETRI_TRANSITIONS=1009} [2023-08-31 01:20:58,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-08-31 01:20:58,632 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1009 transitions, 24103 flow [2023-08-31 01:20:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:20:58,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:20:58,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:20:58,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-31 01:20:58,834 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,SelfDestructingSolverStorable59 [2023-08-31 01:20:58,834 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:20:58,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:20:58,834 INFO L85 PathProgramCache]: Analyzing trace with hash 600903337, now seen corresponding path program 44 times [2023-08-31 01:20:58,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:20:58,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457101110] [2023-08-31 01:20:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:20:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:20:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:20:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:20:59,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:20:59,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457101110] [2023-08-31 01:20:59,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457101110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:20:59,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998511184] [2023-08-31 01:20:59,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:20:59,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:20:59,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:20:59,737 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) [2023-08-31 01:20:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-31 01:20:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:20:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:20:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:20:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:00,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:00,719 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 192 treesize of output 128 [2023-08-31 01:21:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:03,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:03,619 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 267 treesize of output 170 [2023-08-31 01:21:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:03,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998511184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:03,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:03,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-31 01:21:03,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119331278] [2023-08-31 01:21:03,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:21:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:21:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:21:06,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:21:06,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1009 transitions, 24103 flow. Second operand has 26 states, 26 states have (on average 195.73076923076923) internal successors, (5089), 26 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:06,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:06,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:21:06,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:19,044 INFO L130 PetriNetUnfolder]: 3082/6399 cut-off events. [2023-08-31 01:21:19,044 INFO L131 PetriNetUnfolder]: For 174021/174021 co-relation queries the response was YES. [2023-08-31 01:21:19,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 6399 events. 3082/6399 cut-off events. For 174021/174021 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 53952 event pairs, 697 based on Foata normal form. 13/6412 useless extension candidates. Maximal degree in co-relation 60374. Up to 3639 conditions per place. [2023-08-31 01:21:19,121 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 766 selfloop transitions, 417 changer transitions 25/1208 dead transitions. [2023-08-31 01:21:19,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1208 transitions, 29630 flow [2023-08-31 01:21:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 01:21:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 01:21:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7379 transitions. [2023-08-31 01:21:19,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35486197941713954 [2023-08-31 01:21:19,126 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7379 transitions. [2023-08-31 01:21:19,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7379 transitions. [2023-08-31 01:21:19,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:19,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7379 transitions. [2023-08-31 01:21:19,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 199.43243243243242) internal successors, (7379), 37 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:19,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:19,139 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:19,139 INFO L175 Difference]: Start difference. First operand has 416 places, 1009 transitions, 24103 flow. Second operand 37 states and 7379 transitions. [2023-08-31 01:21:19,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1208 transitions, 29630 flow [2023-08-31 01:21:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1208 transitions, 28572 flow, removed 504 selfloop flow, removed 10 redundant places. [2023-08-31 01:21:21,053 INFO L231 Difference]: Finished difference. Result has 450 places, 1074 transitions, 25984 flow [2023-08-31 01:21:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=23228, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25984, PETRI_PLACES=450, PETRI_TRANSITIONS=1074} [2023-08-31 01:21:21,054 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 429 predicate places. [2023-08-31 01:21:21,054 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1074 transitions, 25984 flow [2023-08-31 01:21:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 195.73076923076923) internal successors, (5089), 26 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:21,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:21,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:21:21,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-31 01:21:21,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:21,255 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:21:21,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash -300215526, now seen corresponding path program 45 times [2023-08-31 01:21:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245110303] [2023-08-31 01:21:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 01:21:21,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:21,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245110303] [2023-08-31 01:21:21,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245110303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:21:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365531197] [2023-08-31 01:21:21,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:21:21,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:21:21,589 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) [2023-08-31 01:21:21,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-31 01:21:21,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:21:21,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:21:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 01:21:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:22,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-08-31 01:21:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 01:21:22,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:22,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:22,259 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 65 treesize of output 41 [2023-08-31 01:21:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 01:21:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365531197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:22,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:22,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 01:21:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301717641] [2023-08-31 01:21:22,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:21:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:21:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:21:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 562 [2023-08-31 01:21:22,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1074 transitions, 25984 flow. Second operand has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:22,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:22,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 562 [2023-08-31 01:21:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:25,306 INFO L130 PetriNetUnfolder]: 3091/6363 cut-off events. [2023-08-31 01:21:25,306 INFO L131 PetriNetUnfolder]: For 173147/173147 co-relation queries the response was YES. [2023-08-31 01:21:25,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60412 conditions, 6363 events. 3091/6363 cut-off events. For 173147/173147 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53158 event pairs, 1322 based on Foata normal form. 8/6371 useless extension candidates. Maximal degree in co-relation 60269. Up to 6192 conditions per place. [2023-08-31 01:21:25,388 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 1054 selfloop transitions, 43 changer transitions 0/1097 dead transitions. [2023-08-31 01:21:25,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1097 transitions, 28461 flow [2023-08-31 01:21:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:21:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:21:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1691 transitions. [2023-08-31 01:21:25,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761120996441281 [2023-08-31 01:21:25,390 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1691 transitions. [2023-08-31 01:21:25,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1691 transitions. [2023-08-31 01:21:25,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:25,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1691 transitions. [2023-08-31 01:21:25,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 211.375) internal successors, (1691), 8 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:25,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:25,393 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:25,393 INFO L175 Difference]: Start difference. First operand has 450 places, 1074 transitions, 25984 flow. Second operand 8 states and 1691 transitions. [2023-08-31 01:21:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1097 transitions, 28461 flow [2023-08-31 01:21:27,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1097 transitions, 27989 flow, removed 157 selfloop flow, removed 19 redundant places. [2023-08-31 01:21:27,585 INFO L231 Difference]: Finished difference. Result has 436 places, 1076 transitions, 25649 flow [2023-08-31 01:21:27,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25512, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25649, PETRI_PLACES=436, PETRI_TRANSITIONS=1076} [2023-08-31 01:21:27,586 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-08-31 01:21:27,586 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1076 transitions, 25649 flow [2023-08-31 01:21:27,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.11111111111111) internal successors, (3746), 18 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:27,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:27,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:21:27,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-31 01:21:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:27,793 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:21:27,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2051486215, now seen corresponding path program 46 times [2023-08-31 01:21:27,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271160927] [2023-08-31 01:21:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:28,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271160927] [2023-08-31 01:21:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271160927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:21:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274274788] [2023-08-31 01:21:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:21:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:21:28,552 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) [2023-08-31 01:21:28,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-31 01:21:28,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:21:28,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:21:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 01:21:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:29,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:29,482 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 205 treesize of output 133 [2023-08-31 01:21:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:29,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:32,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:32,233 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 361 treesize of output 212 [2023-08-31 01:21:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274274788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:32,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:21:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302787843] [2023-08-31 01:21:32,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:32,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:21:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:21:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:21:34,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:21:34,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1076 transitions, 25649 flow. Second operand has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:34,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:34,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:21:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:21:43,406 INFO L130 PetriNetUnfolder]: 3448/7011 cut-off events. [2023-08-31 01:21:43,407 INFO L131 PetriNetUnfolder]: For 190618/190618 co-relation queries the response was YES. [2023-08-31 01:21:43,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65742 conditions, 7011 events. 3448/7011 cut-off events. For 190618/190618 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58880 event pairs, 758 based on Foata normal form. 9/7020 useless extension candidates. Maximal degree in co-relation 65601. Up to 3850 conditions per place. [2023-08-31 01:21:43,492 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 888 selfloop transitions, 449 changer transitions 21/1358 dead transitions. [2023-08-31 01:21:43,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1358 transitions, 33327 flow [2023-08-31 01:21:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 01:21:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 01:21:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7377 transitions. [2023-08-31 01:21:43,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354765797826296 [2023-08-31 01:21:43,497 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7377 transitions. [2023-08-31 01:21:43,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7377 transitions. [2023-08-31 01:21:43,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:21:43,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7377 transitions. [2023-08-31 01:21:43,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 199.3783783783784) internal successors, (7377), 37 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:43,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:43,509 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:43,510 INFO L175 Difference]: Start difference. First operand has 436 places, 1076 transitions, 25649 flow. Second operand 37 states and 7377 transitions. [2023-08-31 01:21:43,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1358 transitions, 33327 flow [2023-08-31 01:21:46,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1358 transitions, 33244 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:21:46,037 INFO L231 Difference]: Finished difference. Result has 476 places, 1197 transitions, 29697 flow [2023-08-31 01:21:46,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25568, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=29697, PETRI_PLACES=476, PETRI_TRANSITIONS=1197} [2023-08-31 01:21:46,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-08-31 01:21:46,039 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1197 transitions, 29697 flow [2023-08-31 01:21:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:46,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:21:46,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:21:46,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-31 01:21:46,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:46,245 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:21:46,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:21:46,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1744538243, now seen corresponding path program 47 times [2023-08-31 01:21:46,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:21:46,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634578581] [2023-08-31 01:21:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:21:46,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:21:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:21:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:21:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634578581] [2023-08-31 01:21:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634578581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:21:47,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282237433] [2023-08-31 01:21:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:21:47,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:21:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:21:47,054 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) [2023-08-31 01:21:47,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-31 01:21:47,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:21:47,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:21:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 01:21:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:21:47,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:47,870 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 198 treesize of output 126 [2023-08-31 01:21:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:21:48,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:21:50,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:21:50,761 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 331 treesize of output 213 [2023-08-31 01:21:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:21:51,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282237433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:21:51,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:21:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 30 [2023-08-31 01:21:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494437077] [2023-08-31 01:21:51,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:21:51,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:21:51,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:21:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:21:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-08-31 01:21:53,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 562 [2023-08-31 01:21:53,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1197 transitions, 29697 flow. Second operand has 31 states, 31 states have (on average 193.8709677419355) internal successors, (6010), 31 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:21:53,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:21:53,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 562 [2023-08-31 01:21:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:03,556 INFO L130 PetriNetUnfolder]: 3651/7459 cut-off events. [2023-08-31 01:22:03,557 INFO L131 PetriNetUnfolder]: For 222256/222256 co-relation queries the response was YES. [2023-08-31 01:22:03,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 7459 events. 3651/7459 cut-off events. For 222256/222256 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63808 event pairs, 839 based on Foata normal form. 13/7472 useless extension candidates. Maximal degree in co-relation 72944. Up to 4356 conditions per place. [2023-08-31 01:22:03,647 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 941 selfloop transitions, 466 changer transitions 25/1432 dead transitions. [2023-08-31 01:22:03,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1432 transitions, 36724 flow [2023-08-31 01:22:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 01:22:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 01:22:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 8082 transitions. [2023-08-31 01:22:03,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507508028816943 [2023-08-31 01:22:03,652 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 8082 transitions. [2023-08-31 01:22:03,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 8082 transitions. [2023-08-31 01:22:03,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:03,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 8082 transitions. [2023-08-31 01:22:03,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 197.1219512195122) internal successors, (8082), 41 states have internal predecessors, (8082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:03,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:03,666 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:03,666 INFO L175 Difference]: Start difference. First operand has 476 places, 1197 transitions, 29697 flow. Second operand 41 states and 8082 transitions. [2023-08-31 01:22:03,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1432 transitions, 36724 flow [2023-08-31 01:22:06,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1432 transitions, 35889 flow, removed 398 selfloop flow, removed 10 redundant places. [2023-08-31 01:22:06,463 INFO L231 Difference]: Finished difference. Result has 519 places, 1290 transitions, 32655 flow [2023-08-31 01:22:06,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=28899, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32655, PETRI_PLACES=519, PETRI_TRANSITIONS=1290} [2023-08-31 01:22:06,464 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2023-08-31 01:22:06,465 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1290 transitions, 32655 flow [2023-08-31 01:22:06,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 193.8709677419355) internal successors, (6010), 31 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:06,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:06,666 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,SelfDestructingSolverStorable63 [2023-08-31 01:22:06,666 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:22:06,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash -131688167, now seen corresponding path program 48 times [2023-08-31 01:22:06,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53356529] [2023-08-31 01:22:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:22:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53356529] [2023-08-31 01:22:07,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53356529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:07,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127021253] [2023-08-31 01:22:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:22:07,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:07,905 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) [2023-08-31 01:22:07,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-31 01:22:08,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:22:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:22:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:08,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 84 [2023-08-31 01:22:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:08,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:09,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:22:09,874 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 193 treesize of output 137 [2023-08-31 01:22:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127021253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:10,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:10,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:22:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888958903] [2023-08-31 01:22:10,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:10,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:22:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:22:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:22:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 562 [2023-08-31 01:22:13,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1290 transitions, 32655 flow. Second operand has 32 states, 32 states have (on average 187.59375) internal successors, (6003), 32 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:13,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:13,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 562 [2023-08-31 01:22:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:22,235 INFO L130 PetriNetUnfolder]: 3966/8108 cut-off events. [2023-08-31 01:22:22,235 INFO L131 PetriNetUnfolder]: For 255171/255171 co-relation queries the response was YES. [2023-08-31 01:22:22,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81258 conditions, 8108 events. 3966/8108 cut-off events. For 255171/255171 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 70497 event pairs, 910 based on Foata normal form. 39/8147 useless extension candidates. Maximal degree in co-relation 81092. Up to 4307 conditions per place. [2023-08-31 01:22:22,353 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1062 selfloop transitions, 451 changer transitions 47/1560 dead transitions. [2023-08-31 01:22:22,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1560 transitions, 41470 flow [2023-08-31 01:22:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 01:22:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 01:22:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 7831 transitions. [2023-08-31 01:22:22,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398576512455516 [2023-08-31 01:22:22,360 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 7831 transitions. [2023-08-31 01:22:22,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 7831 transitions. [2023-08-31 01:22:22,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:22,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 7831 transitions. [2023-08-31 01:22:22,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 191.0) internal successors, (7831), 41 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:22,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:22,376 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:22,376 INFO L175 Difference]: Start difference. First operand has 519 places, 1290 transitions, 32655 flow. Second operand 41 states and 7831 transitions. [2023-08-31 01:22:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1560 transitions, 41470 flow [2023-08-31 01:22:26,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1560 transitions, 39635 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-08-31 01:22:26,028 INFO L231 Difference]: Finished difference. Result has 547 places, 1402 transitions, 35645 flow [2023-08-31 01:22:26,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=30610, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=35645, PETRI_PLACES=547, PETRI_TRANSITIONS=1402} [2023-08-31 01:22:26,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-08-31 01:22:26,030 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1402 transitions, 35645 flow [2023-08-31 01:22:26,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 187.59375) internal successors, (6003), 32 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:26,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:26,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:26,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:26,231 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,SelfDestructingSolverStorable64 [2023-08-31 01:22:26,231 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:22:26,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash -195925735, now seen corresponding path program 49 times [2023-08-31 01:22:26,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809639361] [2023-08-31 01:22:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:26,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:26,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809639361] [2023-08-31 01:22:26,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809639361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:26,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258800207] [2023-08-31 01:22:26,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:22:26,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:26,882 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) [2023-08-31 01:22:26,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-31 01:22:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:27,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:22:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:27,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 112 [2023-08-31 01:22:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:22:27,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:29,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:22:29,227 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 355 treesize of output 215 [2023-08-31 01:22:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:29,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258800207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:29,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:29,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-08-31 01:22:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295088676] [2023-08-31 01:22:29,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:29,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 01:22:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 01:22:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-08-31 01:22:31,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 562 [2023-08-31 01:22:31,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1402 transitions, 35645 flow. Second operand has 28 states, 28 states have (on average 193.75) internal successors, (5425), 28 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:31,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:31,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 562 [2023-08-31 01:22:31,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:38,597 INFO L130 PetriNetUnfolder]: 4124/8285 cut-off events. [2023-08-31 01:22:38,597 INFO L131 PetriNetUnfolder]: For 269918/269918 co-relation queries the response was YES. [2023-08-31 01:22:38,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83964 conditions, 8285 events. 4124/8285 cut-off events. For 269918/269918 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 71093 event pairs, 613 based on Foata normal form. 6/8291 useless extension candidates. Maximal degree in co-relation 83786. Up to 3011 conditions per place. [2023-08-31 01:22:38,900 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 918 selfloop transitions, 651 changer transitions 19/1588 dead transitions. [2023-08-31 01:22:38,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1588 transitions, 42956 flow [2023-08-31 01:22:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:22:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:22:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6094 transitions. [2023-08-31 01:22:38,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497876248421536 [2023-08-31 01:22:38,904 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6094 transitions. [2023-08-31 01:22:38,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6094 transitions. [2023-08-31 01:22:38,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:38,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6094 transitions. [2023-08-31 01:22:38,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 196.58064516129033) internal successors, (6094), 31 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:38,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:38,915 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:38,915 INFO L175 Difference]: Start difference. First operand has 547 places, 1402 transitions, 35645 flow. Second operand 31 states and 6094 transitions. [2023-08-31 01:22:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1588 transitions, 42956 flow [2023-08-31 01:22:43,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1588 transitions, 42032 flow, removed 414 selfloop flow, removed 18 redundant places. [2023-08-31 01:22:43,066 INFO L231 Difference]: Finished difference. Result has 566 places, 1514 transitions, 39639 flow [2023-08-31 01:22:43,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=34765, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=39639, PETRI_PLACES=566, PETRI_TRANSITIONS=1514} [2023-08-31 01:22:43,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 545 predicate places. [2023-08-31 01:22:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1514 transitions, 39639 flow [2023-08-31 01:22:43,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 193.75) internal successors, (5425), 28 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:43,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:22:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:22:43,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-31 01:22:43,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:43,268 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:22:43,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:22:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1146111613, now seen corresponding path program 50 times [2023-08-31 01:22:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:22:43,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853434310] [2023-08-31 01:22:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:22:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:22:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:22:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:22:44,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853434310] [2023-08-31 01:22:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853434310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:22:44,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893903896] [2023-08-31 01:22:44,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:22:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:22:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:22:44,244 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) [2023-08-31 01:22:44,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-31 01:22:44,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:22:44,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:22:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:22:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:22:45,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:22:45,075 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 138 treesize of output 86 [2023-08-31 01:22:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:45,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:22:47,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:22:47,741 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 360 treesize of output 188 [2023-08-31 01:22:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:22:48,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893903896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:22:48,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:22:48,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-31 01:22:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86559948] [2023-08-31 01:22:48,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:22:48,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:22:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:22:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:22:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:22:49,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:22:49,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1514 transitions, 39639 flow. Second operand has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:49,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:22:49,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:22:49,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:22:57,734 INFO L130 PetriNetUnfolder]: 4209/8422 cut-off events. [2023-08-31 01:22:57,734 INFO L131 PetriNetUnfolder]: For 290393/290393 co-relation queries the response was YES. [2023-08-31 01:22:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87118 conditions, 8422 events. 4209/8422 cut-off events. For 290393/290393 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 72307 event pairs, 732 based on Foata normal form. 8/8430 useless extension candidates. Maximal degree in co-relation 86939. Up to 3180 conditions per place. [2023-08-31 01:22:57,857 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1034 selfloop transitions, 580 changer transitions 25/1639 dead transitions. [2023-08-31 01:22:57,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1639 transitions, 44515 flow [2023-08-31 01:22:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 01:22:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 01:22:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 7157 transitions. [2023-08-31 01:22:57,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537465401344405 [2023-08-31 01:22:57,862 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 7157 transitions. [2023-08-31 01:22:57,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 7157 transitions. [2023-08-31 01:22:57,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:22:57,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 7157 transitions. [2023-08-31 01:22:57,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 198.80555555555554) internal successors, (7157), 36 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:57,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:57,874 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:22:57,874 INFO L175 Difference]: Start difference. First operand has 566 places, 1514 transitions, 39639 flow. Second operand 36 states and 7157 transitions. [2023-08-31 01:22:57,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1639 transitions, 44515 flow [2023-08-31 01:23:01,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1639 transitions, 43341 flow, removed 445 selfloop flow, removed 17 redundant places. [2023-08-31 01:23:02,016 INFO L231 Difference]: Finished difference. Result has 590 places, 1549 transitions, 40749 flow [2023-08-31 01:23:02,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40749, PETRI_PLACES=590, PETRI_TRANSITIONS=1549} [2023-08-31 01:23:02,018 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 569 predicate places. [2023-08-31 01:23:02,018 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1549 transitions, 40749 flow [2023-08-31 01:23:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:02,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:02,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:02,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-31 01:23:02,226 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,SelfDestructingSolverStorable66 [2023-08-31 01:23:02,226 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:23:02,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2034591411, now seen corresponding path program 51 times [2023-08-31 01:23:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:02,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182330016] [2023-08-31 01:23:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:02,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:03,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:03,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182330016] [2023-08-31 01:23:03,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182330016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:03,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507645742] [2023-08-31 01:23:03,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:23:03,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:03,047 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) [2023-08-31 01:23:03,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-31 01:23:03,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:23:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:23:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:23:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:04,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:04,455 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 187 treesize of output 123 [2023-08-31 01:23:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:06,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:06,811 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 347 treesize of output 211 [2023-08-31 01:23:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507645742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:07,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2023-08-31 01:23:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935121168] [2023-08-31 01:23:07,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:23:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:23:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:23:09,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:23:09,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1549 transitions, 40749 flow. Second operand has 30 states, 30 states have (on average 195.9) internal successors, (5877), 30 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:09,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:09,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:23:09,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:18,213 INFO L130 PetriNetUnfolder]: 4383/8793 cut-off events. [2023-08-31 01:23:18,214 INFO L131 PetriNetUnfolder]: For 315598/315598 co-relation queries the response was YES. [2023-08-31 01:23:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91956 conditions, 8793 events. 4383/8793 cut-off events. For 315598/315598 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 76302 event pairs, 746 based on Foata normal form. 7/8800 useless extension candidates. Maximal degree in co-relation 91770. Up to 3252 conditions per place. [2023-08-31 01:23:18,343 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1010 selfloop transitions, 682 changer transitions 13/1705 dead transitions. [2023-08-31 01:23:18,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1705 transitions, 47634 flow [2023-08-31 01:23:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:23:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:23:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6166 transitions. [2023-08-31 01:23:18,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35392033061646194 [2023-08-31 01:23:18,348 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6166 transitions. [2023-08-31 01:23:18,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6166 transitions. [2023-08-31 01:23:18,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:18,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6166 transitions. [2023-08-31 01:23:18,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 198.90322580645162) internal successors, (6166), 31 states have internal predecessors, (6166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:18,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:18,359 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:18,359 INFO L175 Difference]: Start difference. First operand has 590 places, 1549 transitions, 40749 flow. Second operand 31 states and 6166 transitions. [2023-08-31 01:23:18,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1705 transitions, 47634 flow [2023-08-31 01:23:22,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1705 transitions, 47179 flow, removed 173 selfloop flow, removed 16 redundant places. [2023-08-31 01:23:22,710 INFO L231 Difference]: Finished difference. Result has 608 places, 1610 transitions, 43876 flow [2023-08-31 01:23:22,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=40314, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43876, PETRI_PLACES=608, PETRI_TRANSITIONS=1610} [2023-08-31 01:23:22,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 587 predicate places. [2023-08-31 01:23:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1610 transitions, 43876 flow [2023-08-31 01:23:22,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 195.9) internal successors, (5877), 30 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:22,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:22,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-31 01:23:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-31 01:23:22,913 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:23:22,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -956207045, now seen corresponding path program 52 times [2023-08-31 01:23:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:22,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861564132] [2023-08-31 01:23:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:22,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861564132] [2023-08-31 01:23:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861564132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175869551] [2023-08-31 01:23:23,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:23:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:23,842 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) [2023-08-31 01:23:23,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-31 01:23:24,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:23:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:23:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:23:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:24,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 112 [2023-08-31 01:23:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:24,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:26,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:26,842 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 326 treesize of output 200 [2023-08-31 01:23:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175869551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:23:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460820652] [2023-08-31 01:23:27,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:23:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:23:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:23:29,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:23:29,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1610 transitions, 43876 flow. Second operand has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:29,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:29,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:23:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:23:40,466 INFO L130 PetriNetUnfolder]: 5064/9904 cut-off events. [2023-08-31 01:23:40,466 INFO L131 PetriNetUnfolder]: For 403831/403831 co-relation queries the response was YES. [2023-08-31 01:23:40,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109305 conditions, 9904 events. 5064/9904 cut-off events. For 403831/403831 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 85422 event pairs, 1002 based on Foata normal form. 11/9915 useless extension candidates. Maximal degree in co-relation 109112. Up to 4962 conditions per place. [2023-08-31 01:23:40,629 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1314 selfloop transitions, 623 changer transitions 26/1963 dead transitions. [2023-08-31 01:23:40,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1963 transitions, 56683 flow [2023-08-31 01:23:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 01:23:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 01:23:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7974 transitions. [2023-08-31 01:23:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547153024911032 [2023-08-31 01:23:40,634 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7974 transitions. [2023-08-31 01:23:40,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7974 transitions. [2023-08-31 01:23:40,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:23:40,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7974 transitions. [2023-08-31 01:23:40,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 199.35) internal successors, (7974), 40 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,650 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:40,650 INFO L175 Difference]: Start difference. First operand has 608 places, 1610 transitions, 43876 flow. Second operand 40 states and 7974 transitions. [2023-08-31 01:23:40,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1963 transitions, 56683 flow [2023-08-31 01:23:46,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1963 transitions, 56194 flow, removed 224 selfloop flow, removed 13 redundant places. [2023-08-31 01:23:46,087 INFO L231 Difference]: Finished difference. Result has 645 places, 1809 transitions, 51704 flow [2023-08-31 01:23:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=43399, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51704, PETRI_PLACES=645, PETRI_TRANSITIONS=1809} [2023-08-31 01:23:46,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-08-31 01:23:46,088 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1809 transitions, 51704 flow [2023-08-31 01:23:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.85185185185185) internal successors, (5288), 27 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:23:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:23:46,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-31 01:23:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:46,289 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:23:46,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:23:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1734035139, now seen corresponding path program 53 times [2023-08-31 01:23:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:23:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313692264] [2023-08-31 01:23:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:23:46,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:23:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:23:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:23:47,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313692264] [2023-08-31 01:23:47,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313692264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:23:47,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908914645] [2023-08-31 01:23:47,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:23:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:23:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:23:47,069 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) [2023-08-31 01:23:47,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-31 01:23:47,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:23:47,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:23:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 01:23:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:23:47,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 100 [2023-08-31 01:23:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:47,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:23:49,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:23:49,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 216 [2023-08-31 01:23:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:23:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908914645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:23:50,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:23:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-31 01:23:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745036440] [2023-08-31 01:23:50,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:23:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:23:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:23:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:23:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:23:52,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:23:52,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1809 transitions, 51704 flow. Second operand has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:23:52,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:23:52,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:23:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:24:03,094 INFO L130 PetriNetUnfolder]: 5221/10184 cut-off events. [2023-08-31 01:24:03,094 INFO L131 PetriNetUnfolder]: For 442274/442274 co-relation queries the response was YES. [2023-08-31 01:24:03,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116369 conditions, 10184 events. 5221/10184 cut-off events. For 442274/442274 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 87950 event pairs, 801 based on Foata normal form. 24/10208 useless extension candidates. Maximal degree in co-relation 116163. Up to 3528 conditions per place. [2023-08-31 01:24:03,266 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1231 selfloop transitions, 735 changer transitions 17/1983 dead transitions. [2023-08-31 01:24:03,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1983 transitions, 60096 flow [2023-08-31 01:24:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 01:24:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 01:24:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5778 transitions. [2023-08-31 01:24:03,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35452202724260645 [2023-08-31 01:24:03,270 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5778 transitions. [2023-08-31 01:24:03,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5778 transitions. [2023-08-31 01:24:03,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:24:03,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5778 transitions. [2023-08-31 01:24:03,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 199.24137931034483) internal successors, (5778), 29 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:03,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:03,281 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:03,281 INFO L175 Difference]: Start difference. First operand has 645 places, 1809 transitions, 51704 flow. Second operand 29 states and 5778 transitions. [2023-08-31 01:24:03,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1983 transitions, 60096 flow [2023-08-31 01:24:09,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1983 transitions, 58103 flow, removed 953 selfloop flow, removed 14 redundant places. [2023-08-31 01:24:09,766 INFO L231 Difference]: Finished difference. Result has 664 places, 1892 transitions, 54797 flow [2023-08-31 01:24:09,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=49579, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54797, PETRI_PLACES=664, PETRI_TRANSITIONS=1892} [2023-08-31 01:24:09,768 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 643 predicate places. [2023-08-31 01:24:09,768 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1892 transitions, 54797 flow [2023-08-31 01:24:09,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.8148148148148) internal successors, (5287), 27 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:09,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:24:09,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:24:09,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-31 01:24:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:09,969 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:24:09,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:24:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -649434927, now seen corresponding path program 54 times [2023-08-31 01:24:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:24:09,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962504768] [2023-08-31 01:24:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:24:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:24:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:24:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:24:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962504768] [2023-08-31 01:24:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962504768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:24:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774855595] [2023-08-31 01:24:10,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:24:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:24:10,722 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) [2023-08-31 01:24:10,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-31 01:24:10,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:24:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:24:10,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 01:24:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:24:11,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:11,947 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 134 treesize of output 86 [2023-08-31 01:24:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:12,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:24:14,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:14,456 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 347 treesize of output 211 [2023-08-31 01:24:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:15,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774855595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:24:15,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:24:15,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 01:24:15,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447049079] [2023-08-31 01:24:15,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:24:15,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:24:15,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:24:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:24:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:24:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:24:16,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1892 transitions, 54797 flow. Second operand has 27 states, 27 states have (on average 195.74074074074073) internal successors, (5285), 27 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:16,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:24:16,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:24:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:24:27,027 INFO L130 PetriNetUnfolder]: 5326/10362 cut-off events. [2023-08-31 01:24:27,027 INFO L131 PetriNetUnfolder]: For 463816/463816 co-relation queries the response was YES. [2023-08-31 01:24:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119532 conditions, 10362 events. 5326/10362 cut-off events. For 463816/463816 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 89578 event pairs, 844 based on Foata normal form. 9/10371 useless extension candidates. Maximal degree in co-relation 119320. Up to 3780 conditions per place. [2023-08-31 01:24:27,203 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1199 selfloop transitions, 833 changer transitions 22/2054 dead transitions. [2023-08-31 01:24:27,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2054 transitions, 63044 flow [2023-08-31 01:24:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 01:24:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 01:24:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5368 transitions. [2023-08-31 01:24:27,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35376301568472385 [2023-08-31 01:24:27,207 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5368 transitions. [2023-08-31 01:24:27,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5368 transitions. [2023-08-31 01:24:27,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:24:27,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5368 transitions. [2023-08-31 01:24:27,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.8148148148148) internal successors, (5368), 27 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:27,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:27,217 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:27,217 INFO L175 Difference]: Start difference. First operand has 664 places, 1892 transitions, 54797 flow. Second operand 27 states and 5368 transitions. [2023-08-31 01:24:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2054 transitions, 63044 flow [2023-08-31 01:24:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2054 transitions, 62329 flow, removed 307 selfloop flow, removed 19 redundant places. [2023-08-31 01:24:33,960 INFO L231 Difference]: Finished difference. Result has 683 places, 1966 transitions, 59469 flow [2023-08-31 01:24:33,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=54090, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59469, PETRI_PLACES=683, PETRI_TRANSITIONS=1966} [2023-08-31 01:24:33,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 662 predicate places. [2023-08-31 01:24:33,961 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1966 transitions, 59469 flow [2023-08-31 01:24:33,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.74074074074073) internal successors, (5285), 27 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:33,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:24:33,962 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:24:33,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-31 01:24:34,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:34,163 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:24:34,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:24:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1697031517, now seen corresponding path program 55 times [2023-08-31 01:24:34,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:24:34,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918381513] [2023-08-31 01:24:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:24:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:24:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:24:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:24:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:24:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918381513] [2023-08-31 01:24:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918381513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:24:34,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897810271] [2023-08-31 01:24:34,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:24:34,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:24:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:24:34,990 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) [2023-08-31 01:24:34,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-31 01:24:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:24:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:24:35,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:24:35,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:35,772 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 186 treesize of output 118 [2023-08-31 01:24:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:35,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:24:38,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:24:38,178 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 315 treesize of output 195 [2023-08-31 01:24:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:24:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897810271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:24:38,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:24:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:24:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609676130] [2023-08-31 01:24:38,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:24:38,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:24:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:24:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:24:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:24:41,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-31 01:24:41,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1966 transitions, 59469 flow. Second operand has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:41,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:24:41,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-31 01:24:41,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:24:57,266 INFO L130 PetriNetUnfolder]: 5350/10392 cut-off events. [2023-08-31 01:24:57,266 INFO L131 PetriNetUnfolder]: For 527893/527893 co-relation queries the response was YES. [2023-08-31 01:24:57,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 10392 events. 5350/10392 cut-off events. For 527893/527893 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 89739 event pairs, 668 based on Foata normal form. 4/10396 useless extension candidates. Maximal degree in co-relation 123951. Up to 3187 conditions per place. [2023-08-31 01:24:57,448 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 868 selfloop transitions, 1208 changer transitions 7/2083 dead transitions. [2023-08-31 01:24:57,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2083 transitions, 65648 flow [2023-08-31 01:24:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 01:24:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 01:24:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7568 transitions. [2023-08-31 01:24:57,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366548042704626 [2023-08-31 01:24:57,453 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7568 transitions. [2023-08-31 01:24:57,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7568 transitions. [2023-08-31 01:24:57,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:24:57,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7568 transitions. [2023-08-31 01:24:57,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 189.2) internal successors, (7568), 40 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:57,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:57,467 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:24:57,467 INFO L175 Difference]: Start difference. First operand has 683 places, 1966 transitions, 59469 flow. Second operand 40 states and 7568 transitions. [2023-08-31 01:24:57,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2083 transitions, 65648 flow [2023-08-31 01:25:05,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2083 transitions, 65094 flow, removed 241 selfloop flow, removed 13 redundant places. [2023-08-31 01:25:05,505 INFO L231 Difference]: Finished difference. Result has 708 places, 2010 transitions, 62946 flow [2023-08-31 01:25:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=58941, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=62946, PETRI_PLACES=708, PETRI_TRANSITIONS=2010} [2023-08-31 01:25:05,507 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 687 predicate places. [2023-08-31 01:25:05,507 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 2010 transitions, 62946 flow [2023-08-31 01:25:05,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:05,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:25:05,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:25:05,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-31 01:25:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:25:05,709 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:25:05,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:25:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 962861267, now seen corresponding path program 56 times [2023-08-31 01:25:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:25:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504056342] [2023-08-31 01:25:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:25:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:25:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:25:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:25:06,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:25:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504056342] [2023-08-31 01:25:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504056342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:25:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298670485] [2023-08-31 01:25:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:25:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:25:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:25:06,656 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) [2023-08-31 01:25:06,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-31 01:25:06,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:25:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:25:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:25:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:25:07,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:25:07,842 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 189 treesize of output 121 [2023-08-31 01:25:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:25:08,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:25:10,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:25:10,604 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 332 treesize of output 203 [2023-08-31 01:25:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:25:11,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298670485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:25:11,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:25:11,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:25:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485034800] [2023-08-31 01:25:11,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:25:11,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:25:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:25:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:25:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:25:14,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-31 01:25:14,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 2010 transitions, 62946 flow. Second operand has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:14,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:25:14,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-31 01:25:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:25:29,694 INFO L130 PetriNetUnfolder]: 5528/10726 cut-off events. [2023-08-31 01:25:29,694 INFO L131 PetriNetUnfolder]: For 585054/585054 co-relation queries the response was YES. [2023-08-31 01:25:29,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131969 conditions, 10726 events. 5528/10726 cut-off events. For 585054/585054 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 92967 event pairs, 1199 based on Foata normal form. 13/10739 useless extension candidates. Maximal degree in co-relation 131745. Up to 6082 conditions per place. [2023-08-31 01:25:29,897 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1451 selfloop transitions, 748 changer transitions 23/2222 dead transitions. [2023-08-31 01:25:29,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2222 transitions, 72174 flow [2023-08-31 01:25:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 01:25:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 01:25:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 7975 transitions. [2023-08-31 01:25:29,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786646331130316 [2023-08-31 01:25:29,903 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 7975 transitions. [2023-08-31 01:25:29,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 7975 transitions. [2023-08-31 01:25:29,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:25:29,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 7975 transitions. [2023-08-31 01:25:29,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 189.88095238095238) internal successors, (7975), 42 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:29,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:29,917 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:29,917 INFO L175 Difference]: Start difference. First operand has 708 places, 2010 transitions, 62946 flow. Second operand 42 states and 7975 transitions. [2023-08-31 01:25:29,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2222 transitions, 72174 flow [2023-08-31 01:25:39,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2222 transitions, 69362 flow, removed 217 selfloop flow, removed 28 redundant places. [2023-08-31 01:25:39,436 INFO L231 Difference]: Finished difference. Result has 729 places, 2079 transitions, 64213 flow [2023-08-31 01:25:39,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=60239, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=64213, PETRI_PLACES=729, PETRI_TRANSITIONS=2079} [2023-08-31 01:25:39,438 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 708 predicate places. [2023-08-31 01:25:39,438 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 2079 transitions, 64213 flow [2023-08-31 01:25:39,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:39,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:25:39,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:25:39,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-31 01:25:39,639 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,SelfDestructingSolverStorable72 [2023-08-31 01:25:39,639 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:25:39,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:25:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash 939150035, now seen corresponding path program 57 times [2023-08-31 01:25:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:25:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919768288] [2023-08-31 01:25:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:25:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:25:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:25:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:25:40,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:25:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919768288] [2023-08-31 01:25:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919768288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:25:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274721464] [2023-08-31 01:25:40,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:25:40,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:25:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:25:40,282 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) [2023-08-31 01:25:40,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-31 01:25:40,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:25:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:25:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:25:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:25:41,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:25:41,513 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 206 treesize of output 134 [2023-08-31 01:25:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:25:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:25:43,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:25:43,109 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 257 treesize of output 163 [2023-08-31 01:25:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:25:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274721464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:25:43,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:25:43,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-31 01:25:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63111259] [2023-08-31 01:25:43,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:25:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:25:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:25:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:25:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-08-31 01:25:45,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-31 01:25:45,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 2079 transitions, 64213 flow. Second operand has 29 states, 29 states have (on average 196.82758620689654) internal successors, (5708), 29 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:45,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:25:45,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-31 01:25:45,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:25:57,948 INFO L130 PetriNetUnfolder]: 5554/10767 cut-off events. [2023-08-31 01:25:57,948 INFO L131 PetriNetUnfolder]: For 554874/554874 co-relation queries the response was YES. [2023-08-31 01:25:58,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130728 conditions, 10767 events. 5554/10767 cut-off events. For 554874/554874 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 93464 event pairs, 16 based on Foata normal form. 6/10773 useless extension candidates. Maximal degree in co-relation 130496. Up to 5198 conditions per place. [2023-08-31 01:25:58,140 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1215 selfloop transitions, 1061 changer transitions 12/2288 dead transitions. [2023-08-31 01:25:58,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2288 transitions, 72763 flow [2023-08-31 01:25:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 01:25:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 01:25:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6792 transitions. [2023-08-31 01:25:58,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35545321331379526 [2023-08-31 01:25:58,144 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6792 transitions. [2023-08-31 01:25:58,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6792 transitions. [2023-08-31 01:25:58,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:25:58,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6792 transitions. [2023-08-31 01:25:58,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 199.76470588235293) internal successors, (6792), 34 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,156 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:25:58,156 INFO L175 Difference]: Start difference. First operand has 729 places, 2079 transitions, 64213 flow. Second operand 34 states and 6792 transitions. [2023-08-31 01:25:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2288 transitions, 72763 flow [2023-08-31 01:26:06,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 2288 transitions, 71782 flow, removed 262 selfloop flow, removed 29 redundant places. [2023-08-31 01:26:06,168 INFO L231 Difference]: Finished difference. Result has 739 places, 2109 transitions, 66480 flow [2023-08-31 01:26:06,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=63306, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=66480, PETRI_PLACES=739, PETRI_TRANSITIONS=2109} [2023-08-31 01:26:06,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-08-31 01:26:06,169 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 2109 transitions, 66480 flow [2023-08-31 01:26:06,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 196.82758620689654) internal successors, (5708), 29 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:06,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:26:06,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:26:06,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-31 01:26:06,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-31 01:26:06,371 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:26:06,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:26:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 160769689, now seen corresponding path program 58 times [2023-08-31 01:26:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:26:06,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174465923] [2023-08-31 01:26:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:26:06,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:26:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:26:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:26:07,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:26:07,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174465923] [2023-08-31 01:26:07,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174465923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:26:07,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049264072] [2023-08-31 01:26:07,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:26:07,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:26:07,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:26:07,237 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) [2023-08-31 01:26:07,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-31 01:26:07,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:26:07,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:26:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 01:26:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:26:08,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:26:08,040 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 138 treesize of output 86 [2023-08-31 01:26:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:26:08,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:26:10,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:26:10,724 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 330 treesize of output 209 [2023-08-31 01:26:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:26:10,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049264072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:26:10,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:26:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:26:10,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724923221] [2023-08-31 01:26:10,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:26:10,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:26:10,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:26:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:26:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:26:14,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-31 01:26:14,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 2109 transitions, 66480 flow. Second operand has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:14,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:26:14,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-31 01:26:14,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:26:42,533 INFO L130 PetriNetUnfolder]: 8237/16477 cut-off events. [2023-08-31 01:26:42,533 INFO L131 PetriNetUnfolder]: For 905891/905891 co-relation queries the response was YES. [2023-08-31 01:26:42,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203616 conditions, 16477 events. 8237/16477 cut-off events. For 905891/905891 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 155549 event pairs, 378 based on Foata normal form. 9/16486 useless extension candidates. Maximal degree in co-relation 203382. Up to 4330 conditions per place. [2023-08-31 01:26:42,842 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 2130 selfloop transitions, 1224 changer transitions 34/3388 dead transitions. [2023-08-31 01:26:42,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3388 transitions, 112413 flow [2023-08-31 01:26:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-31 01:26:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-31 01:26:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 10415 transitions. [2023-08-31 01:26:42,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3369459721772889 [2023-08-31 01:26:42,848 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 10415 transitions. [2023-08-31 01:26:42,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 10415 transitions. [2023-08-31 01:26:42,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:26:42,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 10415 transitions. [2023-08-31 01:26:42,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 189.36363636363637) internal successors, (10415), 55 states have internal predecessors, (10415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:42,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:42,868 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:42,869 INFO L175 Difference]: Start difference. First operand has 739 places, 2109 transitions, 66480 flow. Second operand 55 states and 10415 transitions. [2023-08-31 01:26:42,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3388 transitions, 112413 flow [2023-08-31 01:26:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 3388 transitions, 110001 flow, removed 468 selfloop flow, removed 13 redundant places. [2023-08-31 01:26:57,791 INFO L231 Difference]: Finished difference. Result has 801 places, 2537 transitions, 82070 flow [2023-08-31 01:26:57,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64924, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=82070, PETRI_PLACES=801, PETRI_TRANSITIONS=2537} [2023-08-31 01:26:57,794 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2023-08-31 01:26:57,794 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2537 transitions, 82070 flow [2023-08-31 01:26:57,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.65625) internal successors, (5973), 32 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:26:57,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:26:57,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:26:57,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-31 01:26:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:26:58,002 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:26:58,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:26:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1426630437, now seen corresponding path program 59 times [2023-08-31 01:26:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:26:58,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986217491] [2023-08-31 01:26:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:26:58,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:26:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:26:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:26:58,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:26:58,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986217491] [2023-08-31 01:26:58,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986217491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:26:58,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896492080] [2023-08-31 01:26:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:26:58,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:26:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:26:58,682 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) [2023-08-31 01:26:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-31 01:26:58,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:26:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:26:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 01:26:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:26:59,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 113 [2023-08-31 01:26:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:26:59,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:27:01,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:27:01,023 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 303 treesize of output 197 [2023-08-31 01:27:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896492080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:27:01,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:27:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-31 01:27:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428709959] [2023-08-31 01:27:01,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:27:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:27:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:27:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:27:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:27:03,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-08-31 01:27:03,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2537 transitions, 82070 flow. Second operand has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:03,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:27:03,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-08-31 01:27:03,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:27:22,979 INFO L130 PetriNetUnfolder]: 8856/17886 cut-off events. [2023-08-31 01:27:22,979 INFO L131 PetriNetUnfolder]: For 1024379/1024379 co-relation queries the response was YES. [2023-08-31 01:27:23,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230688 conditions, 17886 events. 8856/17886 cut-off events. For 1024379/1024379 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 172513 event pairs, 2298 based on Foata normal form. 25/17911 useless extension candidates. Maximal degree in co-relation 230432. Up to 9799 conditions per place. [2023-08-31 01:27:23,348 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 2169 selfloop transitions, 640 changer transitions 32/2841 dead transitions. [2023-08-31 01:27:23,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2841 transitions, 98102 flow [2023-08-31 01:27:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:27:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:27:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5586 transitions. [2023-08-31 01:27:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35498220640569395 [2023-08-31 01:27:23,352 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5586 transitions. [2023-08-31 01:27:23,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5586 transitions. [2023-08-31 01:27:23,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:27:23,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5586 transitions. [2023-08-31 01:27:23,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 199.5) internal successors, (5586), 28 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:23,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:23,361 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:23,362 INFO L175 Difference]: Start difference. First operand has 801 places, 2537 transitions, 82070 flow. Second operand 28 states and 5586 transitions. [2023-08-31 01:27:23,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2841 transitions, 98102 flow [2023-08-31 01:27:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2841 transitions, 95818 flow, removed 788 selfloop flow, removed 21 redundant places. [2023-08-31 01:27:43,986 INFO L231 Difference]: Finished difference. Result has 812 places, 2673 transitions, 88257 flow [2023-08-31 01:27:43,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=80169, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=88257, PETRI_PLACES=812, PETRI_TRANSITIONS=2673} [2023-08-31 01:27:43,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-08-31 01:27:43,988 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2673 transitions, 88257 flow [2023-08-31 01:27:43,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 195.7037037037037) internal successors, (5284), 27 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:43,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:27:43,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:27:43,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-31 01:27:44,189 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 [2023-08-31 01:27:44,190 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:27:44,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:27:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash -129823397, now seen corresponding path program 60 times [2023-08-31 01:27:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:27:44,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727303800] [2023-08-31 01:27:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:27:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:27:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:27:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:27:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:27:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727303800] [2023-08-31 01:27:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727303800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:27:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116441111] [2023-08-31 01:27:45,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:27:45,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:27:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:27:45,062 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) [2023-08-31 01:27:45,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-31 01:27:45,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:27:45,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:27:45,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:27:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:27:46,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:27:46,301 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 184 treesize of output 116 [2023-08-31 01:27:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:46,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:27:48,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:27:48,946 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 279 treesize of output 189 [2023-08-31 01:27:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:27:49,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116441111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:27:49,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:27:49,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 01:27:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132993895] [2023-08-31 01:27:49,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:27:49,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 01:27:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:27:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 01:27:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2023-08-31 01:27:52,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-08-31 01:27:52,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2673 transitions, 88257 flow. Second operand has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:27:52,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:27:52,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-08-31 01:27:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:28:13,577 INFO L130 PetriNetUnfolder]: 8881/17887 cut-off events. [2023-08-31 01:28:13,577 INFO L131 PetriNetUnfolder]: For 1065719/1065719 co-relation queries the response was YES. [2023-08-31 01:28:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231270 conditions, 17887 events. 8881/17887 cut-off events. For 1065719/1065719 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 172111 event pairs, 1728 based on Foata normal form. 7/17894 useless extension candidates. Maximal degree in co-relation 231010. Up to 8774 conditions per place. [2023-08-31 01:28:14,012 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1731 selfloop transitions, 1035 changer transitions 17/2783 dead transitions. [2023-08-31 01:28:14,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 2783 transitions, 96474 flow [2023-08-31 01:28:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 01:28:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 01:28:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5682 transitions. [2023-08-31 01:28:14,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33701067615658364 [2023-08-31 01:28:14,016 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5682 transitions. [2023-08-31 01:28:14,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5682 transitions. [2023-08-31 01:28:14,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:28:14,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5682 transitions. [2023-08-31 01:28:14,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 189.4) internal successors, (5682), 30 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:28:14,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:28:14,027 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:28:14,027 INFO L175 Difference]: Start difference. First operand has 812 places, 2673 transitions, 88257 flow. Second operand 30 states and 5682 transitions. [2023-08-31 01:28:14,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 2783 transitions, 96474 flow [2023-08-31 01:28:35,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 2783 transitions, 95260 flow, removed 517 selfloop flow, removed 15 redundant places. [2023-08-31 01:28:36,009 INFO L231 Difference]: Finished difference. Result has 829 places, 2713 transitions, 91046 flow [2023-08-31 01:28:36,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=87055, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=91046, PETRI_PLACES=829, PETRI_TRANSITIONS=2713} [2023-08-31 01:28:36,013 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-08-31 01:28:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2713 transitions, 91046 flow [2023-08-31 01:28:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 186.6875) internal successors, (5974), 32 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:28:36,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:28:36,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:28:36,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-31 01:28:36,221 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,SelfDestructingSolverStorable76 [2023-08-31 01:28:36,221 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:28:36,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:28:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1354907421, now seen corresponding path program 61 times [2023-08-31 01:28:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:28:36,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456692251] [2023-08-31 01:28:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:28:36,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:28:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:28:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:28:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:28:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456692251] [2023-08-31 01:28:36,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456692251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:28:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748844359] [2023-08-31 01:28:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:28:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:28:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:28:36,944 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) [2023-08-31 01:28:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-31 01:28:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:28:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-31 01:28:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:28:37,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:28:37,874 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 186 treesize of output 118 [2023-08-31 01:28:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:28:38,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:28:40,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:28:40,536 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 353 treesize of output 213 [2023-08-31 01:28:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:28:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748844359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:28:40,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:28:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-31 01:28:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602910638] [2023-08-31 01:28:40,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:28:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 01:28:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:28:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 01:28:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-08-31 01:28:43,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 562 [2023-08-31 01:28:43,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2713 transitions, 91046 flow. Second operand has 29 states, 29 states have (on average 196.89655172413794) internal successors, (5710), 29 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:28:43,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:28:43,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 562 [2023-08-31 01:28:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15