./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/popl20-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:03:55,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:03:55,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:03:55,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:03:55,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:03:55,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:03:55,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:03:55,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:03:55,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:03:55,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:03:55,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:03:55,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:03:55,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:03:55,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:03:55,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:03:55,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:03:55,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:03:55,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:03:55,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:03:55,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:03:55,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:03:55,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:03:55,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:03:55,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:03:55,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:03:55,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:03:55,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:03:55,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:03:55,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:03:55,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:03:55,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:03:55,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:03:55,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:03:55,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:03:55,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:03:55,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:03:55,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:03:55,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:03:55,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:03:55,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:03:55,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:03:55,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:03:55,630 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:03:55,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:03:55,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:03:55,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:03:55,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:03:55,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:03:55,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:03:55,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:03:55,635 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:03:55,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:03:55,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:03:55,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:03:55,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:03:55,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:03:55,638 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:03:55,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:03:55,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:03:55,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:03:55,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:03:55,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:03:55,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:03:55,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:03:55,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:03:55,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:03:55,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:03:55,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:03:55,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:03:55,641 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:03:55,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:03:55,641 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:03:55,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:03:55,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:03:55,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:03:55,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:03:55,953 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:03:55,954 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:03:55,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 21:03:57,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:03:57,274 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:03:57,274 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 21:03:57,283 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf054810/b6b93986a50f4114b1b8c9eea60e31eb/FLAG3384fde27 [2023-08-30 21:03:57,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf054810/b6b93986a50f4114b1b8c9eea60e31eb [2023-08-30 21:03:57,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:03:57,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:03:57,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:03:57,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:03:57,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:03:57,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8adba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57, skipping insertion in model container [2023-08-30 21:03:57,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:03:57,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:03:57,477 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/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 21:03:57,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:03:57,491 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:03:57,524 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/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 21:03:57,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:03:57,547 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:03:57,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57 WrapperNode [2023-08-30 21:03:57,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:03:57,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:03:57,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:03:57,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:03:57,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,605 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 108 [2023-08-30 21:03:57,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:03:57,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:03:57,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:03:57,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:03:57,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,651 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:03:57,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:03:57,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:03:57,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:03:57,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (1/1) ... [2023-08-30 21:03:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:03:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:57,697 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) [2023-08-30 21:03:57,712 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 [2023-08-30 21:03:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:03:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:03:57,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:03:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:03:57,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:03:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:03:57,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:03:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:03:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:03:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:03:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:03:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:03:57,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:03:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:03:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:03:57,743 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:03:57,893 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:03:57,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:03:58,171 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:03:58,179 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:03:58,179 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 21:03:58,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:03:58 BoogieIcfgContainer [2023-08-30 21:03:58,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:03:58,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:03:58,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:03:58,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:03:58,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:03:57" (1/3) ... [2023-08-30 21:03:58,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c35fe09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:03:58, skipping insertion in model container [2023-08-30 21:03:58,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:03:57" (2/3) ... [2023-08-30 21:03:58,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c35fe09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:03:58, skipping insertion in model container [2023-08-30 21:03:58,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:03:58" (3/3) ... [2023-08-30 21:03:58,188 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-08-30 21:03:58,195 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:03:58,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:03:58,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:03:58,204 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:03:58,285 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 21:03:58,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 175 transitions, 374 flow [2023-08-30 21:03:58,435 INFO L130 PetriNetUnfolder]: 15/172 cut-off events. [2023-08-30 21:03:58,435 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:03:58,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 15/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 21:03:58,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 175 transitions, 374 flow [2023-08-30 21:03:58,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 162 transitions, 342 flow [2023-08-30 21:03:58,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:03:58,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 162 transitions, 342 flow [2023-08-30 21:03:58,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 162 transitions, 342 flow [2023-08-30 21:03:58,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 162 transitions, 342 flow [2023-08-30 21:03:58,530 INFO L130 PetriNetUnfolder]: 15/162 cut-off events. [2023-08-30 21:03:58,531 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:03:58,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 15/162 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 21:03:58,536 INFO L119 LiptonReduction]: Number of co-enabled transitions 3534 [2023-08-30 21:04:03,894 INFO L134 LiptonReduction]: Checked pairs total: 4092 [2023-08-30 21:04:03,894 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 21:04:03,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:04:03,911 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;@15c48eda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:04:03,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 21:04:03,918 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-08-30 21:04:03,918 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:04:03,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:03,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:03,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:03,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1548535715, now seen corresponding path program 1 times [2023-08-30 21:04:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890182410] [2023-08-30 21:04:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890182410] [2023-08-30 21:04:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890182410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:04:04,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:04:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:04:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830902941] [2023-08-30 21:04:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:04:04,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:04:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:04:04,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 341 [2023-08-30 21:04:04,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:04,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:04,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 341 [2023-08-30 21:04:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:04,694 INFO L130 PetriNetUnfolder]: 543/714 cut-off events. [2023-08-30 21:04:04,695 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 21:04:04,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 714 events. 543/714 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2207 event pairs, 212 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 1213. Up to 697 conditions per place. [2023-08-30 21:04:04,703 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 24 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-30 21:04:04,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 128 flow [2023-08-30 21:04:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:04:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:04:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-30 21:04:04,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809384164222874 [2023-08-30 21:04:04,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-30 21:04:04,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-30 21:04:04,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:04,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-30 21:04:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:04,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:04,744 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 492 transitions. [2023-08-30 21:04:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 128 flow [2023-08-30 21:04:04,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 21:04:04,751 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 74 flow [2023-08-30 21:04:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-30 21:04:04,756 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-30 21:04:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 74 flow [2023-08-30 21:04:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:04,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:04:04,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:04,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2004951010, now seen corresponding path program 1 times [2023-08-30 21:04:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161567522] [2023-08-30 21:04:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161567522] [2023-08-30 21:04:05,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161567522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:04:05,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:04:05,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:04:05,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549196656] [2023-08-30 21:04:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:04:05,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:04:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:04:05,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 341 [2023-08-30 21:04:05,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:05,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:05,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 341 [2023-08-30 21:04:05,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:05,432 INFO L130 PetriNetUnfolder]: 753/1008 cut-off events. [2023-08-30 21:04:05,433 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 21:04:05,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1008 events. 753/1008 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3502 event pairs, 95 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2032. Up to 825 conditions per place. [2023-08-30 21:04:05,438 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 39 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2023-08-30 21:04:05,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 203 flow [2023-08-30 21:04:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:04:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:04:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-30 21:04:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965786901270772 [2023-08-30 21:04:05,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-30 21:04:05,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-30 21:04:05,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:05,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-30 21:04:05,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:05,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:05,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:05,447 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 74 flow. Second operand 3 states and 508 transitions. [2023-08-30 21:04:05,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 203 flow [2023-08-30 21:04:05,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:04:05,449 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 100 flow [2023-08-30 21:04:05,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-08-30 21:04:05,450 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 21:04:05,450 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 100 flow [2023-08-30 21:04:05,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:05,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:05,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:05,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:04:05,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:05,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 610154948, now seen corresponding path program 1 times [2023-08-30 21:04:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148712885] [2023-08-30 21:04:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:05,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:05,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148712885] [2023-08-30 21:04:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148712885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:05,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987335881] [2023-08-30 21:04:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:05,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:05,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:05,661 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) [2023-08-30 21:04:05,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:04:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:04:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987335881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:06,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:06,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 21:04:06,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674512565] [2023-08-30 21:04:06,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:04:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:04:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:04:06,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 341 [2023-08-30 21:04:06,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 100 flow. Second operand has 12 states, 12 states have (on average 149.33333333333334) internal successors, (1792), 12 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:06,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:06,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 341 [2023-08-30 21:04:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:06,860 INFO L130 PetriNetUnfolder]: 1451/1990 cut-off events. [2023-08-30 21:04:06,861 INFO L131 PetriNetUnfolder]: For 456/458 co-relation queries the response was YES. [2023-08-30 21:04:06,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1990 events. 1451/1990 cut-off events. For 456/458 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8476 event pairs, 397 based on Foata normal form. 66/1680 useless extension candidates. Maximal degree in co-relation 2520. Up to 758 conditions per place. [2023-08-30 21:04:06,872 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 80 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-08-30 21:04:06,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 88 transitions, 445 flow [2023-08-30 21:04:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:04:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:04:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1100 transitions. [2023-08-30 21:04:06,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608294930875576 [2023-08-30 21:04:06,877 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1100 transitions. [2023-08-30 21:04:06,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1100 transitions. [2023-08-30 21:04:06,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:06,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1100 transitions. [2023-08-30 21:04:06,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.14285714285714) internal successors, (1100), 7 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) [2023-08-30 21:04:06,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:06,885 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 100 flow. Second operand 7 states and 1100 transitions. [2023-08-30 21:04:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 88 transitions, 445 flow [2023-08-30 21:04:06,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 88 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:04:06,888 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 143 flow [2023-08-30 21:04:06,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-30 21:04:06,889 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-30 21:04:06,889 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 143 flow [2023-08-30 21:04:06,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.33333333333334) internal successors, (1792), 12 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:06,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:06,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:06,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:07,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:07,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:07,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash -141297123, now seen corresponding path program 1 times [2023-08-30 21:04:07,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:07,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59448087] [2023-08-30 21:04:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:07,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59448087] [2023-08-30 21:04:07,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59448087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:07,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611636142] [2023-08-30 21:04:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:07,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:07,261 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) [2023-08-30 21:04:07,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:04:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 21:04:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:07,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611636142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:07,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:07,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 21:04:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473856948] [2023-08-30 21:04:07,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:04:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:04:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:04:07,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 341 [2023-08-30 21:04:07,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 150.58333333333334) internal successors, (1807), 12 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:07,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:07,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 341 [2023-08-30 21:04:07,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:07,853 INFO L130 PetriNetUnfolder]: 942/1371 cut-off events. [2023-08-30 21:04:07,853 INFO L131 PetriNetUnfolder]: For 627/679 co-relation queries the response was YES. [2023-08-30 21:04:07,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1371 events. 942/1371 cut-off events. For 627/679 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5932 event pairs, 343 based on Foata normal form. 64/1230 useless extension candidates. Maximal degree in co-relation 2541. Up to 612 conditions per place. [2023-08-30 21:04:07,878 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 70 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2023-08-30 21:04:07,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 424 flow [2023-08-30 21:04:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:04:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:04:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1107 transitions. [2023-08-30 21:04:07,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637620444072057 [2023-08-30 21:04:07,882 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1107 transitions. [2023-08-30 21:04:07,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1107 transitions. [2023-08-30 21:04:07,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:07,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1107 transitions. [2023-08-30 21:04:07,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.14285714285714) internal successors, (1107), 7 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) [2023-08-30 21:04:07,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:07,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:07,889 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 143 flow. Second operand 7 states and 1107 transitions. [2023-08-30 21:04:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 424 flow [2023-08-30 21:04:07,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 416 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 21:04:07,893 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 165 flow [2023-08-30 21:04:07,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-30 21:04:07,894 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-08-30 21:04:07,894 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 165 flow [2023-08-30 21:04:07,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.58333333333334) internal successors, (1807), 12 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:07,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:07,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:07,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 21:04:08,100 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,SelfDestructingSolverStorable3 [2023-08-30 21:04:08,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:08,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash -990089336, now seen corresponding path program 1 times [2023-08-30 21:04:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:08,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108983779] [2023-08-30 21:04:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:08,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:08,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108983779] [2023-08-30 21:04:08,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108983779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:08,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108593510] [2023-08-30 21:04:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:08,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:08,341 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) [2023-08-30 21:04:08,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:04:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:08,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:04:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:08,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108593510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:08,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 21:04:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341665939] [2023-08-30 21:04:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:04:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:04:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:04:08,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 341 [2023-08-30 21:04:08,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 165 flow. Second operand has 14 states, 14 states have (on average 149.21428571428572) internal successors, (2089), 14 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:08,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:08,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 341 [2023-08-30 21:04:08,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:09,218 INFO L130 PetriNetUnfolder]: 734/1067 cut-off events. [2023-08-30 21:04:09,218 INFO L131 PetriNetUnfolder]: For 808/841 co-relation queries the response was YES. [2023-08-30 21:04:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 1067 events. 734/1067 cut-off events. For 808/841 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4421 event pairs, 271 based on Foata normal form. 33/1031 useless extension candidates. Maximal degree in co-relation 2802. Up to 691 conditions per place. [2023-08-30 21:04:09,225 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 40 selfloop transitions, 4 changer transitions 25/71 dead transitions. [2023-08-30 21:04:09,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 403 flow [2023-08-30 21:04:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:04:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:04:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1085 transitions. [2023-08-30 21:04:09,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 21:04:09,229 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1085 transitions. [2023-08-30 21:04:09,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1085 transitions. [2023-08-30 21:04:09,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:09,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1085 transitions. [2023-08-30 21:04:09,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:09,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:09,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:09,236 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 165 flow. Second operand 7 states and 1085 transitions. [2023-08-30 21:04:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 403 flow [2023-08-30 21:04:09,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 394 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:04:09,245 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 140 flow [2023-08-30 21:04:09,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2023-08-30 21:04:09,247 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-08-30 21:04:09,248 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 140 flow [2023-08-30 21:04:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 149.21428571428572) internal successors, (2089), 14 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:09,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:09,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:09,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:09,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:09,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:09,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash 547279721, now seen corresponding path program 2 times [2023-08-30 21:04:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:09,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523666049] [2023-08-30 21:04:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:09,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523666049] [2023-08-30 21:04:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523666049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794663952] [2023-08-30 21:04:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:04:09,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:09,610 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) [2023-08-30 21:04:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:04:09,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:04:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 21:04:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:09,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:09,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794663952] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:09,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:04:09,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-08-30 21:04:09,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401996933] [2023-08-30 21:04:09,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:09,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:04:09,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:09,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:04:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:04:09,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 341 [2023-08-30 21:04:09,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:09,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:09,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 341 [2023-08-30 21:04:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:09,993 INFO L130 PetriNetUnfolder]: 751/1009 cut-off events. [2023-08-30 21:04:09,994 INFO L131 PetriNetUnfolder]: For 744/746 co-relation queries the response was YES. [2023-08-30 21:04:09,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 1009 events. 751/1009 cut-off events. For 744/746 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3415 event pairs, 155 based on Foata normal form. 48/1056 useless extension candidates. Maximal degree in co-relation 3082. Up to 583 conditions per place. [2023-08-30 21:04:10,000 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 38 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2023-08-30 21:04:10,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 289 flow [2023-08-30 21:04:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:04:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:04:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 930 transitions. [2023-08-30 21:04:10,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 21:04:10,003 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 930 transitions. [2023-08-30 21:04:10,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 930 transitions. [2023-08-30 21:04:10,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:10,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 930 transitions. [2023-08-30 21:04:10,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:10,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:10,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:10,009 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 140 flow. Second operand 6 states and 930 transitions. [2023-08-30 21:04:10,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 289 flow [2023-08-30 21:04:10,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 243 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-30 21:04:10,013 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 144 flow [2023-08-30 21:04:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 21:04:10,014 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-08-30 21:04:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 144 flow [2023-08-30 21:04:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:10,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:10,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:10,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:10,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:10,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1381542472, now seen corresponding path program 2 times [2023-08-30 21:04:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:10,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669489558] [2023-08-30 21:04:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:10,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669489558] [2023-08-30 21:04:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669489558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024457484] [2023-08-30 21:04:10,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:04:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:10,394 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) [2023-08-30 21:04:10,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:04:10,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:04:10,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:10,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:04:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:10,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:10,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024457484] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:10,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:04:10,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2023-08-30 21:04:10,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96599730] [2023-08-30 21:04:10,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:10,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:04:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:04:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:04:10,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 341 [2023-08-30 21:04:10,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:10,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:10,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 341 [2023-08-30 21:04:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:11,112 INFO L130 PetriNetUnfolder]: 947/1306 cut-off events. [2023-08-30 21:04:11,112 INFO L131 PetriNetUnfolder]: For 1389/1577 co-relation queries the response was YES. [2023-08-30 21:04:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3955 conditions, 1306 events. 947/1306 cut-off events. For 1389/1577 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4851 event pairs, 242 based on Foata normal form. 202/1419 useless extension candidates. Maximal degree in co-relation 3927. Up to 717 conditions per place. [2023-08-30 21:04:11,120 INFO L137 encePairwiseOnDemand]: 332/341 looper letters, 76 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-30 21:04:11,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 88 transitions, 538 flow [2023-08-30 21:04:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:04:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:04:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1208 transitions. [2023-08-30 21:04:11,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2023-08-30 21:04:11,124 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1208 transitions. [2023-08-30 21:04:11,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1208 transitions. [2023-08-30 21:04:11,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:11,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1208 transitions. [2023-08-30 21:04:11,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:11,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 341.0) internal successors, (3069), 9 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:11,133 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 341.0) internal successors, (3069), 9 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:11,133 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 144 flow. Second operand 8 states and 1208 transitions. [2023-08-30 21:04:11,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 88 transitions, 538 flow [2023-08-30 21:04:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 21:04:11,136 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 208 flow [2023-08-30 21:04:11,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=208, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-08-30 21:04:11,137 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-30 21:04:11,138 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 208 flow [2023-08-30 21:04:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:11,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:11,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:11,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:11,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1520372626, now seen corresponding path program 3 times [2023-08-30 21:04:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849881758] [2023-08-30 21:04:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:11,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:11,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849881758] [2023-08-30 21:04:11,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849881758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:11,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552034051] [2023-08-30 21:04:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:04:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:11,501 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) [2023-08-30 21:04:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:04:11,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:04:11,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:04:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:11,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552034051] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:11,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:04:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2023-08-30 21:04:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265169040] [2023-08-30 21:04:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:04:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:04:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:04:11,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 341 [2023-08-30 21:04:11,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:11,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:11,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 341 [2023-08-30 21:04:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:12,310 INFO L130 PetriNetUnfolder]: 1354/1861 cut-off events. [2023-08-30 21:04:12,311 INFO L131 PetriNetUnfolder]: For 2964/3192 co-relation queries the response was YES. [2023-08-30 21:04:12,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 1861 events. 1354/1861 cut-off events. For 2964/3192 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7039 event pairs, 292 based on Foata normal form. 240/2100 useless extension candidates. Maximal degree in co-relation 6667. Up to 877 conditions per place. [2023-08-30 21:04:12,322 INFO L137 encePairwiseOnDemand]: 331/341 looper letters, 98 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2023-08-30 21:04:12,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 127 transitions, 896 flow [2023-08-30 21:04:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 21:04:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 21:04:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1512 transitions. [2023-08-30 21:04:12,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434017595307918 [2023-08-30 21:04:12,328 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1512 transitions. [2023-08-30 21:04:12,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1512 transitions. [2023-08-30 21:04:12,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:12,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1512 transitions. [2023-08-30 21:04:12,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.2) internal successors, (1512), 10 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:12,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 341.0) internal successors, (3751), 11 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:12,336 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 341.0) internal successors, (3751), 11 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:12,336 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 208 flow. Second operand 10 states and 1512 transitions. [2023-08-30 21:04:12,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 127 transitions, 896 flow [2023-08-30 21:04:12,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 127 transitions, 873 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 21:04:12,343 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 383 flow [2023-08-30 21:04:12,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-30 21:04:12,344 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 26 predicate places. [2023-08-30 21:04:12,345 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 383 flow [2023-08-30 21:04:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:12,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:12,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:12,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:12,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:12,552 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:12,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -259531838, now seen corresponding path program 4 times [2023-08-30 21:04:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:12,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712234620] [2023-08-30 21:04:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712234620] [2023-08-30 21:04:12,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712234620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:12,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264025169] [2023-08-30 21:04:12,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:04:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:12,696 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) [2023-08-30 21:04:12,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:04:12,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:04:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:04:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:12,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264025169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:13,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-30 21:04:13,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402423160] [2023-08-30 21:04:13,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:04:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:04:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:04:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 341 [2023-08-30 21:04:13,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 383 flow. Second operand has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:13,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:13,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 341 [2023-08-30 21:04:13,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:13,971 INFO L130 PetriNetUnfolder]: 1773/2440 cut-off events. [2023-08-30 21:04:13,972 INFO L131 PetriNetUnfolder]: For 6600/6898 co-relation queries the response was YES. [2023-08-30 21:04:13,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10465 conditions, 2440 events. 1773/2440 cut-off events. For 6600/6898 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9975 event pairs, 316 based on Foata normal form. 312/2751 useless extension candidates. Maximal degree in co-relation 10429. Up to 1135 conditions per place. [2023-08-30 21:04:13,989 INFO L137 encePairwiseOnDemand]: 330/341 looper letters, 110 selfloop transitions, 51 changer transitions 0/162 dead transitions. [2023-08-30 21:04:13,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 162 transitions, 1330 flow [2023-08-30 21:04:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 21:04:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 21:04:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1523 transitions. [2023-08-30 21:04:13,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466275659824047 [2023-08-30 21:04:13,994 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1523 transitions. [2023-08-30 21:04:13,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1523 transitions. [2023-08-30 21:04:13,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:13,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1523 transitions. [2023-08-30 21:04:13,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 152.3) internal successors, (1523), 10 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 341.0) internal successors, (3751), 11 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,003 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 341.0) internal successors, (3751), 11 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,003 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 383 flow. Second operand 10 states and 1523 transitions. [2023-08-30 21:04:14,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 162 transitions, 1330 flow [2023-08-30 21:04:14,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 162 transitions, 1269 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-30 21:04:14,025 INFO L231 Difference]: Finished difference. Result has 69 places, 90 transitions, 794 flow [2023-08-30 21:04:14,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=794, PETRI_PLACES=69, PETRI_TRANSITIONS=90} [2023-08-30 21:04:14,026 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-08-30 21:04:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 90 transitions, 794 flow [2023-08-30 21:04:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:14,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:14,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:14,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:14,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:14,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 111750626, now seen corresponding path program 5 times [2023-08-30 21:04:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445623155] [2023-08-30 21:04:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:14,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:14,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445623155] [2023-08-30 21:04:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445623155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:14,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452430607] [2023-08-30 21:04:14,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:04:14,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:14,385 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) [2023-08-30 21:04:14,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:04:14,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:04:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:04:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:04:14,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:04:14,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452430607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:14,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:14,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-08-30 21:04:14,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923842776] [2023-08-30 21:04:14,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:14,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:04:14,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:04:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:04:14,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 341 [2023-08-30 21:04:14,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 90 transitions, 794 flow. Second operand has 15 states, 15 states have (on average 140.86666666666667) internal successors, (2113), 15 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:14,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:14,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 341 [2023-08-30 21:04:14,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:15,816 INFO L130 PetriNetUnfolder]: 2124/2936 cut-off events. [2023-08-30 21:04:15,816 INFO L131 PetriNetUnfolder]: For 11245/11245 co-relation queries the response was YES. [2023-08-30 21:04:15,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14382 conditions, 2936 events. 2124/2936 cut-off events. For 11245/11245 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11868 event pairs, 72 based on Foata normal form. 16/2952 useless extension candidates. Maximal degree in co-relation 14340. Up to 1249 conditions per place. [2023-08-30 21:04:15,838 INFO L137 encePairwiseOnDemand]: 329/341 looper letters, 144 selfloop transitions, 105 changer transitions 0/249 dead transitions. [2023-08-30 21:04:15,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 249 transitions, 2475 flow [2023-08-30 21:04:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:04:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:04:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2351 transitions. [2023-08-30 21:04:15,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309017595307918 [2023-08-30 21:04:15,844 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2351 transitions. [2023-08-30 21:04:15,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2351 transitions. [2023-08-30 21:04:15,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:15,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2351 transitions. [2023-08-30 21:04:15,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 146.9375) internal successors, (2351), 16 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:15,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 341.0) internal successors, (5797), 17 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:15,857 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 341.0) internal successors, (5797), 17 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:15,857 INFO L175 Difference]: Start difference. First operand has 69 places, 90 transitions, 794 flow. Second operand 16 states and 2351 transitions. [2023-08-30 21:04:15,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 249 transitions, 2475 flow [2023-08-30 21:04:15,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 249 transitions, 2432 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 21:04:15,948 INFO L231 Difference]: Finished difference. Result has 89 places, 149 transitions, 1706 flow [2023-08-30 21:04:15,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1706, PETRI_PLACES=89, PETRI_TRANSITIONS=149} [2023-08-30 21:04:15,948 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 57 predicate places. [2023-08-30 21:04:15,948 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 149 transitions, 1706 flow [2023-08-30 21:04:15,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 140.86666666666667) internal successors, (2113), 15 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:15,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:15,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:15,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:16,155 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,SelfDestructingSolverStorable9 [2023-08-30 21:04:16,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:16,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2132688008, now seen corresponding path program 6 times [2023-08-30 21:04:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084252726] [2023-08-30 21:04:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:16,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:16,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084252726] [2023-08-30 21:04:16,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084252726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:16,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099882366] [2023-08-30 21:04:16,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:04:16,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:16,308 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) [2023-08-30 21:04:16,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:04:16,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:04:16,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:04:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:04:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:16,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099882366] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:16,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:04:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2023-08-30 21:04:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109759411] [2023-08-30 21:04:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:04:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:04:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:04:16,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 341 [2023-08-30 21:04:16,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 149 transitions, 1706 flow. Second operand has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:16,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:16,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 341 [2023-08-30 21:04:16,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:17,205 INFO L130 PetriNetUnfolder]: 2056/2828 cut-off events. [2023-08-30 21:04:17,205 INFO L131 PetriNetUnfolder]: For 13548/13666 co-relation queries the response was YES. [2023-08-30 21:04:17,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15149 conditions, 2828 events. 2056/2828 cut-off events. For 13548/13666 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11377 event pairs, 270 based on Foata normal form. 132/2960 useless extension candidates. Maximal degree in co-relation 15098. Up to 1119 conditions per place. [2023-08-30 21:04:17,229 INFO L137 encePairwiseOnDemand]: 331/341 looper letters, 130 selfloop transitions, 71 changer transitions 0/207 dead transitions. [2023-08-30 21:04:17,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 207 transitions, 2433 flow [2023-08-30 21:04:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:04:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:04:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1368 transitions. [2023-08-30 21:04:17,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2023-08-30 21:04:17,233 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1368 transitions. [2023-08-30 21:04:17,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1368 transitions. [2023-08-30 21:04:17,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:17,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1368 transitions. [2023-08-30 21:04:17,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.0) internal successors, (1368), 9 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:17,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:17,240 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:17,241 INFO L175 Difference]: Start difference. First operand has 89 places, 149 transitions, 1706 flow. Second operand 9 states and 1368 transitions. [2023-08-30 21:04:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 207 transitions, 2433 flow [2023-08-30 21:04:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 207 transitions, 2400 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 21:04:17,294 INFO L231 Difference]: Finished difference. Result has 96 places, 151 transitions, 1893 flow [2023-08-30 21:04:17,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1893, PETRI_PLACES=96, PETRI_TRANSITIONS=151} [2023-08-30 21:04:17,298 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2023-08-30 21:04:17,298 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 151 transitions, 1893 flow [2023-08-30 21:04:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:17,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:17,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:17,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:17,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:17,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:17,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1095595526, now seen corresponding path program 7 times [2023-08-30 21:04:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995703413] [2023-08-30 21:04:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:17,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995703413] [2023-08-30 21:04:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995703413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674515297] [2023-08-30 21:04:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:04:17,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:17,648 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) [2023-08-30 21:04:17,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:04:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:04:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:17,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:04:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674515297] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:17,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:04:17,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2023-08-30 21:04:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130760097] [2023-08-30 21:04:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:17,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:04:17,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:04:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:04:18,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 341 [2023-08-30 21:04:18,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 151 transitions, 1893 flow. Second operand has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:18,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:18,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 341 [2023-08-30 21:04:18,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:18,484 INFO L130 PetriNetUnfolder]: 2020/2772 cut-off events. [2023-08-30 21:04:18,484 INFO L131 PetriNetUnfolder]: For 16622/16734 co-relation queries the response was YES. [2023-08-30 21:04:18,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15837 conditions, 2772 events. 2020/2772 cut-off events. For 16622/16734 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10995 event pairs, 302 based on Foata normal form. 126/2898 useless extension candidates. Maximal degree in co-relation 15783. Up to 1096 conditions per place. [2023-08-30 21:04:18,512 INFO L137 encePairwiseOnDemand]: 331/341 looper letters, 95 selfloop transitions, 102 changer transitions 0/203 dead transitions. [2023-08-30 21:04:18,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 203 transitions, 2568 flow [2023-08-30 21:04:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:04:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:04:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1363 transitions. [2023-08-30 21:04:18,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444118605408928 [2023-08-30 21:04:18,516 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1363 transitions. [2023-08-30 21:04:18,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1363 transitions. [2023-08-30 21:04:18,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:18,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1363 transitions. [2023-08-30 21:04:18,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.44444444444446) internal successors, (1363), 9 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:18,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:18,524 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:18,524 INFO L175 Difference]: Start difference. First operand has 96 places, 151 transitions, 1893 flow. Second operand 9 states and 1363 transitions. [2023-08-30 21:04:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 203 transitions, 2568 flow [2023-08-30 21:04:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 203 transitions, 2553 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 21:04:18,593 INFO L231 Difference]: Finished difference. Result has 103 places, 153 transitions, 2192 flow [2023-08-30 21:04:18,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2192, PETRI_PLACES=103, PETRI_TRANSITIONS=153} [2023-08-30 21:04:18,594 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 71 predicate places. [2023-08-30 21:04:18,594 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 153 transitions, 2192 flow [2023-08-30 21:04:18,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.875) internal successors, (1159), 8 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) [2023-08-30 21:04:18,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:18,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:18,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:04:18,801 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,SelfDestructingSolverStorable11 [2023-08-30 21:04:18,801 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:18,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1081782259, now seen corresponding path program 1 times [2023-08-30 21:04:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910882485] [2023-08-30 21:04:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:04:18,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910882485] [2023-08-30 21:04:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910882485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:04:18,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:04:18,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:04:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021689809] [2023-08-30 21:04:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:04:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:04:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:04:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:04:18,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 341 [2023-08-30 21:04:18,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 153 transitions, 2192 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:18,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:18,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 341 [2023-08-30 21:04:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:19,203 INFO L130 PetriNetUnfolder]: 1876/2602 cut-off events. [2023-08-30 21:04:19,203 INFO L131 PetriNetUnfolder]: For 25072/25806 co-relation queries the response was YES. [2023-08-30 21:04:19,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16315 conditions, 2602 events. 1876/2602 cut-off events. For 25072/25806 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 11346 event pairs, 464 based on Foata normal form. 436/2943 useless extension candidates. Maximal degree in co-relation 16258. Up to 1644 conditions per place. [2023-08-30 21:04:19,256 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 166 selfloop transitions, 3 changer transitions 0/194 dead transitions. [2023-08-30 21:04:19,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 194 transitions, 3059 flow [2023-08-30 21:04:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:04:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:04:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2023-08-30 21:04:19,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49853372434017595 [2023-08-30 21:04:19,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2023-08-30 21:04:19,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2023-08-30 21:04:19,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:04:19,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2023-08-30 21:04:19,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:19,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:19,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:19,262 INFO L175 Difference]: Start difference. First operand has 103 places, 153 transitions, 2192 flow. Second operand 3 states and 510 transitions. [2023-08-30 21:04:19,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 194 transitions, 3059 flow [2023-08-30 21:04:19,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 194 transitions, 2924 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-30 21:04:19,309 INFO L231 Difference]: Finished difference. Result has 100 places, 153 transitions, 2093 flow [2023-08-30 21:04:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2093, PETRI_PLACES=100, PETRI_TRANSITIONS=153} [2023-08-30 21:04:19,310 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 68 predicate places. [2023-08-30 21:04:19,310 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 153 transitions, 2093 flow [2023-08-30 21:04:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:04:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:04:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 21:04:19,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:04:19,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:04:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2072266448, now seen corresponding path program 1 times [2023-08-30 21:04:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:04:19,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567550245] [2023-08-30 21:04:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:04:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:22,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:04:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567550245] [2023-08-30 21:04:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567550245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:04:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939327326] [2023-08-30 21:04:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:04:22,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:04:22,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:04:22,597 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) [2023-08-30 21:04:22,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:04:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:04:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 21:04:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:04:22,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:04:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:04:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:04:23,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 21:04:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:04:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 21:04:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:04:23,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:04:23,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 52 [2023-08-30 21:04:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:04:24,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:25,388 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (+ c_~A~0.offset 4 (* c_thread1Thread1of1ForFork0_~i~0 4))) (.cse10 (* 4 c_~M~0))) (let ((.cse1 (= (mod c_~sorted3~0 256) 0)) (.cse2 (<= c_~N~0 (+ c_~M~0 1))) (.cse3 (< (+ 2 c_~M~0) c_~N~0)) (.cse8 (+ c_~A~0.offset .cse10)) (.cse7 (+ c_~A~0.offset .cse10 4)) (.cse4 (= (mod c_~sorted2~0 256) 0)) (.cse0 (forall ((v_ArrVal_587 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_587) c_~A~0.base) .cse6) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (and (or .cse0 (not .cse1) .cse2 .cse3) (or .cse1 .cse2 .cse3 .cse4 (forall ((v_ArrVal_587 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_587) c_~A~0.base))) (or (< |c_thread1Thread1of1ForFork0_#t~mem2| (select .cse5 .cse6)) (<= (select .cse5 .cse7) (select .cse5 .cse8)))))) (or .cse2 .cse3 (and (forall ((v_ArrVal_587 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_587) c_~A~0.base))) (or (<= (select .cse9 .cse6) |c_thread1Thread1of1ForFork0_#t~mem2|) (< (select .cse9 .cse8) (select .cse9 .cse7))))) (or (not .cse4) .cse0)))))) is different from false [2023-08-30 21:04:30,968 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((~M~0 Int) (v_ArrVal_586 (Array Int Int)) (v_ArrVal_585 (Array Int Int)) (v_ArrVal_587 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_585))) (let ((.cse0 (select (store (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_586) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 0 ~M~0) (let ((.cse1 (* ~M~0 4))) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (< (+ 2 ~M~0) c_~N~0) (<= (select .cse0 .cse2) (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (<= c_~N~0 (+ ~M~0 1)))))) (forall ((~M~0 Int) (v_ArrVal_586 (Array Int Int)) (v_ArrVal_585 (Array Int Int)) (v_ArrVal_587 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_585))) (let ((.cse5 (select (store (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_586) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< 0 ~M~0) (< (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (select .cse5 .cse2)) (< (+ 2 ~M~0) c_~N~0) (let ((.cse6 (* ~M~0 4))) (<= (select .cse5 (+ .cse6 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse5 (+ .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (<= c_~N~0 (+ ~M~0 1)))))))) is different from false [2023-08-30 21:04:30,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:04:30,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 76 [2023-08-30 21:04:31,039 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-08-30 21:04:31,040 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 515 treesize of output 480 [2023-08-30 21:04:31,085 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-30 21:04:31,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 314 treesize of output 254 [2023-08-30 21:04:31,107 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-30 21:04:31,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 220 [2023-08-30 21:04:31,143 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-08-30 21:04:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 118 treesize of output 119 [2023-08-30 21:04:31,700 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 21:04:31,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 1 [2023-08-30 21:04:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 21:04:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939327326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:04:31,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:04:31,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-30 21:04:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64682002] [2023-08-30 21:04:31,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:04:31,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 21:04:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:04:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 21:04:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1462, Unknown=15, NotChecked=158, Total=1806 [2023-08-30 21:04:32,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 341 [2023-08-30 21:04:32,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 153 transitions, 2093 flow. Second operand has 43 states, 43 states have (on average 86.74418604651163) internal successors, (3730), 43 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:04:32,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:04:32,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 341 [2023-08-30 21:04:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:04:41,638 WARN L222 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 123 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:16,944 WARN L222 SmtUtils]: Spent 33.71s on a formula simplification. DAG size of input: 136 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:05:40,011 WARN L222 SmtUtils]: Spent 18.99s on a formula simplification. DAG size of input: 143 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:06:32,190 WARN L222 SmtUtils]: Spent 19.12s on a formula simplification. DAG size of input: 162 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:13,735 WARN L222 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 139 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:35,820 WARN L222 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 192 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:07:38,213 INFO L130 PetriNetUnfolder]: 6133/8833 cut-off events. [2023-08-30 21:07:38,213 INFO L131 PetriNetUnfolder]: For 70049/70049 co-relation queries the response was YES. [2023-08-30 21:07:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51119 conditions, 8833 events. 6133/8833 cut-off events. For 70049/70049 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 46620 event pairs, 121 based on Foata normal form. 7/8840 useless extension candidates. Maximal degree in co-relation 51063. Up to 3586 conditions per place. [2023-08-30 21:07:38,294 INFO L137 encePairwiseOnDemand]: 323/341 looper letters, 609 selfloop transitions, 505 changer transitions 42/1156 dead transitions. [2023-08-30 21:07:38,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1156 transitions, 14436 flow [2023-08-30 21:07:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-30 21:07:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-30 21:07:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 7570 transitions. [2023-08-30 21:07:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2740668332066182 [2023-08-30 21:07:38,308 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 7570 transitions. [2023-08-30 21:07:38,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 7570 transitions. [2023-08-30 21:07:38,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:07:38,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 7570 transitions. [2023-08-30 21:07:38,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 93.45679012345678) internal successors, (7570), 81 states have internal predecessors, (7570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:38,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 341.0) internal successors, (27962), 82 states have internal predecessors, (27962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:38,417 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 341.0) internal successors, (27962), 82 states have internal predecessors, (27962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:38,417 INFO L175 Difference]: Start difference. First operand has 100 places, 153 transitions, 2093 flow. Second operand 81 states and 7570 transitions. [2023-08-30 21:07:38,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 1156 transitions, 14436 flow [2023-08-30 21:07:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 1156 transitions, 14427 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:07:38,721 INFO L231 Difference]: Finished difference. Result has 204 places, 646 transitions, 10231 flow [2023-08-30 21:07:38,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=10231, PETRI_PLACES=204, PETRI_TRANSITIONS=646} [2023-08-30 21:07:38,722 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 172 predicate places. [2023-08-30 21:07:38,722 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 646 transitions, 10231 flow [2023-08-30 21:07:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 86.74418604651163) internal successors, (3730), 43 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:38,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:07:38,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:07:38,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:07:38,933 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,SelfDestructingSolverStorable13 [2023-08-30 21:07:38,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:07:38,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:07:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1236109612, now seen corresponding path program 2 times [2023-08-30 21:07:38,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:07:38,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454755095] [2023-08-30 21:07:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:07:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:07:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:07:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:07:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454755095] [2023-08-30 21:07:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454755095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:07:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075529194] [2023-08-30 21:07:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:07:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:07:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:07:41,192 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) [2023-08-30 21:07:41,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:07:41,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:07:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:07:41,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 21:07:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:07:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:07:42,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:42,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 52 [2023-08-30 21:07:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:07:43,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:07:43,874 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 77 treesize of output 79 [2023-08-30 21:07:43,961 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-30 21:07:43,961 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 41 treesize of output 1 [2023-08-30 21:07:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:07:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075529194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:07:44,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:07:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 21:07:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249873608] [2023-08-30 21:07:44,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:07:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 21:07:44,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:07:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 21:07:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 21:07:47,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 341 [2023-08-30 21:07:47,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 646 transitions, 10231 flow. Second operand has 38 states, 38 states have (on average 121.97368421052632) internal successors, (4635), 38 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:07:47,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:07:47,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 341 [2023-08-30 21:07:47,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:08:16,202 INFO L130 PetriNetUnfolder]: 12320/17724 cut-off events. [2023-08-30 21:08:16,202 INFO L131 PetriNetUnfolder]: For 180393/180393 co-relation queries the response was YES. [2023-08-30 21:08:16,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117498 conditions, 17724 events. 12320/17724 cut-off events. For 180393/180393 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 102300 event pairs, 154 based on Foata normal form. 386/18110 useless extension candidates. Maximal degree in co-relation 117413. Up to 6989 conditions per place. [2023-08-30 21:08:16,409 INFO L137 encePairwiseOnDemand]: 322/341 looper letters, 823 selfloop transitions, 1275 changer transitions 51/2149 dead transitions. [2023-08-30 21:08:16,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 2149 transitions, 31039 flow [2023-08-30 21:08:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-08-30 21:08:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-08-30 21:08:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 13342 transitions. [2023-08-30 21:08:16,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835892128112242 [2023-08-30 21:08:16,437 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 13342 transitions. [2023-08-30 21:08:16,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 13342 transitions. [2023-08-30 21:08:16,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:08:16,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 13342 transitions. [2023-08-30 21:08:16,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 130.80392156862746) internal successors, (13342), 102 states have internal predecessors, (13342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:16,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 341.0) internal successors, (35123), 103 states have internal predecessors, (35123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:16,511 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 341.0) internal successors, (35123), 103 states have internal predecessors, (35123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:16,511 INFO L175 Difference]: Start difference. First operand has 204 places, 646 transitions, 10231 flow. Second operand 102 states and 13342 transitions. [2023-08-30 21:08:16,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 2149 transitions, 31039 flow [2023-08-30 21:08:17,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 2149 transitions, 28973 flow, removed 980 selfloop flow, removed 4 redundant places. [2023-08-30 21:08:17,666 INFO L231 Difference]: Finished difference. Result has 356 places, 1489 transitions, 24596 flow [2023-08-30 21:08:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=24596, PETRI_PLACES=356, PETRI_TRANSITIONS=1489} [2023-08-30 21:08:17,667 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 324 predicate places. [2023-08-30 21:08:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1489 transitions, 24596 flow [2023-08-30 21:08:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 121.97368421052632) internal successors, (4635), 38 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:17,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:08:17,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:08:17,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:08:17,875 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,SelfDestructingSolverStorable14 [2023-08-30 21:08:17,875 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:08:17,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:08:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1304888468, now seen corresponding path program 3 times [2023-08-30 21:08:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:08:17,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150851041] [2023-08-30 21:08:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:08:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:08:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:08:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:08:20,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:08:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150851041] [2023-08-30 21:08:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150851041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:08:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406158386] [2023-08-30 21:08:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:08:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:08:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:08:20,157 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) [2023-08-30 21:08:20,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:08:20,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:08:20,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:08:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 21:08:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:08:20,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:08:20,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:08:20,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:08:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:08:20,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 21:08:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:08:21,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:21,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 52 [2023-08-30 21:08:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:08:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:08:25,602 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_688 (Array Int Int)) (v_ArrVal_687 (Array Int Int)) (v_ArrVal_686 (Array Int Int))) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_686) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687))) (let ((.cse0 (select (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_84 Int)) (or (let ((.cse1 (* v_thread3Thread1of1ForFork2_~i~2_84 4))) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (< (+ v_thread3Thread1of1ForFork2_~i~2_84 2) c_~N~0) (<= c_~N~0 (+ v_thread3Thread1of1ForFork2_~i~2_84 1)) (< 0 v_thread3Thread1of1ForFork2_~i~2_84))) (<= (select .cse0 .cse2) (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) (forall ((v_ArrVal_688 (Array Int Int)) (v_thread3Thread1of1ForFork2_~i~2_84 Int) (v_ArrVal_687 (Array Int Int)) (v_ArrVal_686 (Array Int Int))) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_686) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_84 2) c_~N~0) (< (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (select .cse5 .cse2)) (<= c_~N~0 (+ v_thread3Thread1of1ForFork2_~i~2_84 1)) (let ((.cse6 (* v_thread3Thread1of1ForFork2_~i~2_84 4))) (<= (select .cse5 (+ .cse6 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse5 (+ .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (< 0 v_thread3Thread1of1ForFork2_~i~2_84))))))) is different from false [2023-08-30 21:08:25,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:08:25,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2023-08-30 21:08:25,687 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-08-30 21:08:25,688 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 823 treesize of output 776 [2023-08-30 21:08:25,727 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-30 21:08:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 258 [2023-08-30 21:08:25,772 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-08-30 21:08:25,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 250 treesize of output 234 [2023-08-30 21:08:25,823 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-08-30 21:08:25,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 119 [2023-08-30 21:08:26,563 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 21:08:26,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 1 [2023-08-30 21:08:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 21:08:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406158386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:08:26,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:08:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 38 [2023-08-30 21:08:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185235806] [2023-08-30 21:08:26,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:08:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 21:08:26,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:08:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 21:08:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1310, Unknown=14, NotChecked=74, Total=1560 [2023-08-30 21:08:27,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 341 [2023-08-30 21:08:27,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1489 transitions, 24596 flow. Second operand has 40 states, 40 states have (on average 86.825) internal successors, (3473), 40 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:08:27,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:08:27,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 341 [2023-08-30 21:08:27,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:08:51,492 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:04,652 WARN L222 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 78 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:15,006 WARN L222 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 117 DAG size of output: 115 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:09:36,887 WARN L222 SmtUtils]: Spent 15.17s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:10:09,824 WARN L222 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 124 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:10:36,639 WARN L222 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 140 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:10:48,236 WARN L222 SmtUtils]: Spent 10.91s on a formula simplification. DAG size of input: 137 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:09,027 WARN L222 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 153 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:16,782 WARN L222 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 172 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:27,276 WARN L222 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 155 DAG size of output: 152 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:33,655 WARN L222 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 135 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:51,237 WARN L222 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:11:53,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:12:16,099 WARN L222 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 224 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:12:22,792 WARN L222 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 185 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:12:43,284 WARN L222 SmtUtils]: Spent 19.85s on a formula simplification. DAG size of input: 168 DAG size of output: 165 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:13:18,841 WARN L222 SmtUtils]: Spent 14.92s on a formula simplification. DAG size of input: 161 DAG size of output: 159 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:13:34,620 WARN L222 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 179 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:13:52,519 WARN L222 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 133 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:14:08,148 WARN L222 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 131 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:14:25,801 WARN L222 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 204 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:14:44,520 WARN L222 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 146 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:14:52,075 WARN L222 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 165 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:15:19,224 WARN L222 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 217 DAG size of output: 142 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:15:30,796 WARN L222 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 174 DAG size of output: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:15:40,306 WARN L222 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 187 DAG size of output: 169 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:15:49,050 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 168 DAG size of output: 147 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:16:03,105 WARN L222 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 200 DAG size of output: 182 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:16:15,428 WARN L222 SmtUtils]: Spent 11.36s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:16:29,175 WARN L222 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 195 DAG size of output: 144 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:16:37,117 WARN L222 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:16:57,930 WARN L222 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 208 DAG size of output: 161 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:17:09,139 WARN L222 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 169 DAG size of output: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:17:15,610 INFO L130 PetriNetUnfolder]: 46588/66946 cut-off events. [2023-08-30 21:17:15,610 INFO L131 PetriNetUnfolder]: For 1028233/1028233 co-relation queries the response was YES. [2023-08-30 21:17:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525582 conditions, 66946 events. 46588/66946 cut-off events. For 1028233/1028233 co-relation queries the response was YES. Maximal size of possible extension queue 2647. Compared 460544 event pairs, 3090 based on Foata normal form. 305/67251 useless extension candidates. Maximal degree in co-relation 524477. Up to 18565 conditions per place. [2023-08-30 21:17:17,762 INFO L137 encePairwiseOnDemand]: 324/341 looper letters, 3463 selfloop transitions, 4438 changer transitions 45/7946 dead transitions. [2023-08-30 21:17:17,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 7946 transitions, 144147 flow [2023-08-30 21:17:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-08-30 21:17:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2023-08-30 21:17:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 14027 transitions. [2023-08-30 21:17:17,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27982923374628443 [2023-08-30 21:17:17,783 INFO L72 ComplementDD]: Start complementDD. Operand 147 states and 14027 transitions. [2023-08-30 21:17:17,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 147 states and 14027 transitions. [2023-08-30 21:17:17,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:17:17,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 147 states and 14027 transitions. [2023-08-30 21:17:17,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 148 states, 147 states have (on average 95.421768707483) internal successors, (14027), 147 states have internal predecessors, (14027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:17,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 148 states, 148 states have (on average 341.0) internal successors, (50468), 148 states have internal predecessors, (50468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:17,850 INFO L81 ComplementDD]: Finished complementDD. Result has 148 states, 148 states have (on average 341.0) internal successors, (50468), 148 states have internal predecessors, (50468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:17:17,850 INFO L175 Difference]: Start difference. First operand has 356 places, 1489 transitions, 24596 flow. Second operand 147 states and 14027 transitions. [2023-08-30 21:17:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 7946 transitions, 144147 flow Killed by 15