./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:18:02,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:18:02,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:18:02,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:18:02,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:18:02,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:18:02,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:18:02,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:18:02,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:18:02,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:18:02,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:18:02,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:18:02,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:18:02,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:18:02,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:18:02,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:18:02,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:18:02,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:18:02,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:18:02,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:18:02,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:18:02,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:18:02,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:18:02,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:18:02,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:18:02,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:18:02,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:18:02,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:18:02,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:18:02,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:18:02,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:18:02,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:18:02,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:18:02,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:18:02,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:18:02,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:18:02,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:18:02,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:18:02,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:18:02,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:18:02,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:18:02,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:18:02,409 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:18:02,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:18:02,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:18:02,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:18:02,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:18:02,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:18:02,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:18:02,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:18:02,411 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:18:02,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:18:02,412 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:18:02,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:18:02,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:18:02,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:18:02,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:18:02,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:18:02,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:18:02,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:18:02,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:18:02,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:18:02,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:18:02,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:18:02,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:18:02,416 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:18:02,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:18:02,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:18:02,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:18:02,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:18:02,642 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:18:02,642 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:18:02,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 14:18:03,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:18:03,706 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:18:03,706 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 14:18:03,710 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c9bbdcc/eb457d116cb74fa8af2f8509decc4e9b/FLAG8ed1a0b1f [2023-09-01 14:18:03,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c9bbdcc/eb457d116cb74fa8af2f8509decc4e9b [2023-09-01 14:18:03,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:18:03,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:18:03,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:18:03,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:18:03,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:18:03,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f745ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03, skipping insertion in model container [2023-09-01 14:18:03,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:18:03,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:18:03,867 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-09-01 14:18:03,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:18:03,879 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:18:03,899 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-09-01 14:18:03,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:18:03,909 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:18:03,910 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:18:03,914 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:18:03,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03 WrapperNode [2023-09-01 14:18:03,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:18:03,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:18:03,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:18:03,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:18:03,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,942 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-09-01 14:18:03,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:18:03,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:18:03,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:18:03,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:18:03,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:18:03,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:18:03,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:18:03,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:18:03,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (1/1) ... [2023-09-01 14:18:03,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:18:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:04,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:18:04,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:18:04,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:18:04,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:18:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:18:04,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:18:04,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:18:04,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:18:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:18:04,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:18:04,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:18:04,040 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:18:04,099 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:18:04,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:18:04,211 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:18:04,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:18:04,247 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 14:18:04,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:18:04 BoogieIcfgContainer [2023-09-01 14:18:04,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:18:04,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:18:04,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:18:04,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:18:04,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:18:03" (1/3) ... [2023-09-01 14:18:04,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4526d225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:18:04, skipping insertion in model container [2023-09-01 14:18:04,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:18:03" (2/3) ... [2023-09-01 14:18:04,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4526d225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:18:04, skipping insertion in model container [2023-09-01 14:18:04,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:18:04" (3/3) ... [2023-09-01 14:18:04,255 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 14:18:04,260 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:18:04,266 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:18:04,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:18:04,266 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:18:04,302 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:18:04,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-09-01 14:18:04,391 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-09-01 14:18:04,392 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:18:04,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 14:18:04,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-09-01 14:18:04,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-09-01 14:18:04,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:18:04,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-09-01 14:18:04,415 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-09-01 14:18:04,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-09-01 14:18:04,443 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-09-01 14:18:04,443 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:18:04,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 14:18:04,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-09-01 14:18:06,171 INFO L134 LiptonReduction]: Checked pairs total: 449 [2023-09-01 14:18:06,172 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-09-01 14:18:06,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:18:06,184 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;@4fb908ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:18:06,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:18:06,188 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 14:18:06,188 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:18:06,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:06,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:06,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:06,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash -507941003, now seen corresponding path program 1 times [2023-09-01 14:18:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059165427] [2023-09-01 14:18:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:06,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:06,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059165427] [2023-09-01 14:18:06,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059165427] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:18:06,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:18:06,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:18:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934485079] [2023-09-01 14:18:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:18:06,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:18:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:18:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:18:06,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-09-01 14:18:06,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:06,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-09-01 14:18:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:06,532 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-09-01 14:18:06,532 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 14:18:06,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 238 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2023-09-01 14:18:06,535 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-09-01 14:18:06,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-09-01 14:18:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:18:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:18:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-09-01 14:18:06,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2023-09-01 14:18:06,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-09-01 14:18:06,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-09-01 14:18:06,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:06,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-09-01 14:18:06,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,562 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,563 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-09-01 14:18:06,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-09-01 14:18:06,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:18:06,566 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-09-01 14:18:06,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-09-01 14:18:06,571 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-09-01 14:18:06,571 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-09-01 14:18:06,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:06,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:18:06,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:06,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash -259176130, now seen corresponding path program 1 times [2023-09-01 14:18:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999862378] [2023-09-01 14:18:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:06,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:06,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999862378] [2023-09-01 14:18:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999862378] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:18:06,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:18:06,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:18:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137752017] [2023-09-01 14:18:06,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:18:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:18:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:18:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:18:06,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-09-01 14:18:06,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:06,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-09-01 14:18:06,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:06,784 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2023-09-01 14:18:06,785 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2023-09-01 14:18:06,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 204 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2023-09-01 14:18:06,786 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-09-01 14:18:06,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-09-01 14:18:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:18:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:18:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-09-01 14:18:06,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47758620689655173 [2023-09-01 14:18:06,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-09-01 14:18:06,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-09-01 14:18:06,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:06,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-09-01 14:18:06,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,792 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,792 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 277 transitions. [2023-09-01 14:18:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-09-01 14:18:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:18:06,793 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-09-01 14:18:06,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-09-01 14:18:06,794 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-09-01 14:18:06,794 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-09-01 14:18:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:06,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:18:06,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:06,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 746860219, now seen corresponding path program 1 times [2023-09-01 14:18:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095536241] [2023-09-01 14:18:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095536241] [2023-09-01 14:18:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095536241] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251645210] [2023-09-01 14:18:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:06,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:06,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:06,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:07,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:18:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:07,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251645210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:07,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 14:18:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448765554] [2023-09-01 14:18:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:18:07,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:18:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:18:07,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:07,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:07,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:07,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:07,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:08,056 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2023-09-01 14:18:08,056 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 14:18:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2023-09-01 14:18:08,058 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2023-09-01 14:18:08,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2023-09-01 14:18:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:18:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:18:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1160 transitions. [2023-09-01 14:18:08,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 14:18:08,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1160 transitions. [2023-09-01 14:18:08,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1160 transitions. [2023-09-01 14:18:08,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:08,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1160 transitions. [2023-09-01 14:18:08,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:08,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:08,068 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:08,068 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1160 transitions. [2023-09-01 14:18:08,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2023-09-01 14:18:08,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 14:18:08,070 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2023-09-01 14:18:08,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-09-01 14:18:08,071 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-09-01 14:18:08,071 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2023-09-01 14:18:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:08,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:08,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:08,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:18:08,277 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 [2023-09-01 14:18:08,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:08,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash 979621307, now seen corresponding path program 2 times [2023-09-01 14:18:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:08,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599898380] [2023-09-01 14:18:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:08,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:08,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599898380] [2023-09-01 14:18:08,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599898380] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807375601] [2023-09-01 14:18:08,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:18:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:08,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:08,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:18:08,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:08,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:08,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:08,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807375601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:08,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:08,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:18:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752782726] [2023-09-01 14:18:08,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:18:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:18:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:18:09,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:09,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:09,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:09,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:09,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:09,989 INFO L130 PetriNetUnfolder]: 304/598 cut-off events. [2023-09-01 14:18:09,989 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-09-01 14:18:09,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 598 events. 304/598 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2830 event pairs, 31 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2310. Up to 228 conditions per place. [2023-09-01 14:18:09,993 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 95 selfloop transitions, 40 changer transitions 70/205 dead transitions. [2023-09-01 14:18:09,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1461 flow [2023-09-01 14:18:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:18:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:18:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2220 transitions. [2023-09-01 14:18:09,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374384236453202 [2023-09-01 14:18:09,997 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2220 transitions. [2023-09-01 14:18:09,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2220 transitions. [2023-09-01 14:18:09,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:09,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2220 transitions. [2023-09-01 14:18:10,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.42857142857143) internal successors, (2220), 35 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:10,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:10,006 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:10,006 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 35 states and 2220 transitions. [2023-09-01 14:18:10,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1461 flow [2023-09-01 14:18:10,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 205 transitions, 1286 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-09-01 14:18:10,015 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 613 flow [2023-09-01 14:18:10,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=613, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-09-01 14:18:10,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-09-01 14:18:10,016 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 613 flow [2023-09-01 14:18:10,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:10,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:10,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:10,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:10,221 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 [2023-09-01 14:18:10,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:10,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash -632437385, now seen corresponding path program 3 times [2023-09-01 14:18:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:10,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844361514] [2023-09-01 14:18:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:10,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844361514] [2023-09-01 14:18:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844361514] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998015947] [2023-09-01 14:18:10,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:18:10,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:10,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:10,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:10,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:18:10,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:18:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:10,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998015947] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:10,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 14:18:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458611046] [2023-09-01 14:18:10,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:18:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:18:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:18:10,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:10,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 613 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:10,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:10,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:10,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:11,370 INFO L130 PetriNetUnfolder]: 289/582 cut-off events. [2023-09-01 14:18:11,370 INFO L131 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2023-09-01 14:18:11,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 582 events. 289/582 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2838 event pairs, 17 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2915. Up to 159 conditions per place. [2023-09-01 14:18:11,374 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 73 selfloop transitions, 50 changer transitions 47/170 dead transitions. [2023-09-01 14:18:11,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1577 flow [2023-09-01 14:18:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:18:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:18:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1409 transitions. [2023-09-01 14:18:11,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441692789968652 [2023-09-01 14:18:11,377 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1409 transitions. [2023-09-01 14:18:11,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1409 transitions. [2023-09-01 14:18:11,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:11,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1409 transitions. [2023-09-01 14:18:11,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.04545454545455) internal successors, (1409), 22 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:11,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:11,383 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:11,383 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 613 flow. Second operand 22 states and 1409 transitions. [2023-09-01 14:18:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1577 flow [2023-09-01 14:18:11,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1367 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-09-01 14:18:11,400 INFO L231 Difference]: Finished difference. Result has 107 places, 80 transitions, 699 flow [2023-09-01 14:18:11,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=699, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2023-09-01 14:18:11,401 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-09-01 14:18:11,401 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 699 flow [2023-09-01 14:18:11,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:11,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:11,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:11,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:11,608 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 [2023-09-01 14:18:11,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:11,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2086276037, now seen corresponding path program 4 times [2023-09-01 14:18:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40983702] [2023-09-01 14:18:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40983702] [2023-09-01 14:18:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40983702] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721173643] [2023-09-01 14:18:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:18:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:11,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:11,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:18:11,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:18:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721173643] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:12,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 14:18:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659498979] [2023-09-01 14:18:12,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:18:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:18:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:18:12,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:12,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 699 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:12,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:12,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:12,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:12,611 INFO L130 PetriNetUnfolder]: 295/603 cut-off events. [2023-09-01 14:18:12,611 INFO L131 PetriNetUnfolder]: For 6131/6131 co-relation queries the response was YES. [2023-09-01 14:18:12,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 603 events. 295/603 cut-off events. For 6131/6131 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2999 event pairs, 29 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3086. Up to 160 conditions per place. [2023-09-01 14:18:12,615 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 61 changer transitions 22/173 dead transitions. [2023-09-01 14:18:12,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1710 flow [2023-09-01 14:18:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:18:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:18:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1411 transitions. [2023-09-01 14:18:12,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44231974921630096 [2023-09-01 14:18:12,618 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1411 transitions. [2023-09-01 14:18:12,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1411 transitions. [2023-09-01 14:18:12,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:12,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1411 transitions. [2023-09-01 14:18:12,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:12,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:12,624 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:12,625 INFO L175 Difference]: Start difference. First operand has 107 places, 80 transitions, 699 flow. Second operand 22 states and 1411 transitions. [2023-09-01 14:18:12,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1710 flow [2023-09-01 14:18:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1478 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-09-01 14:18:12,638 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 853 flow [2023-09-01 14:18:12,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=853, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-09-01 14:18:12,638 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-09-01 14:18:12,639 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 853 flow [2023-09-01 14:18:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:12,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:12,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:12,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:12,843 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 [2023-09-01 14:18:12,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:12,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1344414463, now seen corresponding path program 5 times [2023-09-01 14:18:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:12,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825543312] [2023-09-01 14:18:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:12,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825543312] [2023-09-01 14:18:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825543312] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771262467] [2023-09-01 14:18:12,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:18:12,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:12,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:12,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:12,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:18:13,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:18:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:13,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:18:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:13,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771262467] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:13,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-09-01 14:18:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317607377] [2023-09-01 14:18:13,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:18:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:18:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:18:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:13,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:13,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:13,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:13,966 INFO L130 PetriNetUnfolder]: 277/579 cut-off events. [2023-09-01 14:18:13,967 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-09-01 14:18:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 579 events. 277/579 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2886 event pairs, 5 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2934. Up to 300 conditions per place. [2023-09-01 14:18:13,970 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 80 selfloop transitions, 49 changer transitions 20/149 dead transitions. [2023-09-01 14:18:13,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1482 flow [2023-09-01 14:18:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:18:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:18:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1081 transitions. [2023-09-01 14:18:13,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385395537525355 [2023-09-01 14:18:13,974 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1081 transitions. [2023-09-01 14:18:13,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1081 transitions. [2023-09-01 14:18:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:13,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1081 transitions. [2023-09-01 14:18:13,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.588235294117645) internal successors, (1081), 17 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:13,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:13,979 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:13,979 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 853 flow. Second operand 17 states and 1081 transitions. [2023-09-01 14:18:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1482 flow [2023-09-01 14:18:13,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1285 flow, removed 43 selfloop flow, removed 13 redundant places. [2023-09-01 14:18:13,992 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 879 flow [2023-09-01 14:18:13,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=879, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2023-09-01 14:18:13,993 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-09-01 14:18:13,994 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 879 flow [2023-09-01 14:18:13,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:13,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:13,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:14,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:14,200 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 [2023-09-01 14:18:14,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:14,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:14,201 INFO L85 PathProgramCache]: Analyzing trace with hash 538396011, now seen corresponding path program 6 times [2023-09-01 14:18:14,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:14,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359887302] [2023-09-01 14:18:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359887302] [2023-09-01 14:18:14,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359887302] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173993256] [2023-09-01 14:18:14,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:18:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:14,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:14,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:18:14,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:18:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 14:18:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:14,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173993256] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:14,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-09-01 14:18:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362671035] [2023-09-01 14:18:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:18:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:18:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:18:14,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-09-01 14:18:14,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:14,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:14,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-09-01 14:18:14,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:14,418 INFO L130 PetriNetUnfolder]: 237/471 cut-off events. [2023-09-01 14:18:14,418 INFO L131 PetriNetUnfolder]: For 5720/5720 co-relation queries the response was YES. [2023-09-01 14:18:14,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 471 events. 237/471 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2059 event pairs, 30 based on Foata normal form. 20/486 useless extension candidates. Maximal degree in co-relation 2415. Up to 401 conditions per place. [2023-09-01 14:18:14,421 INFO L137 encePairwiseOnDemand]: 140/145 looper letters, 79 selfloop transitions, 17 changer transitions 2/101 dead transitions. [2023-09-01 14:18:14,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 101 transitions, 1050 flow [2023-09-01 14:18:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:18:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:18:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 417 transitions. [2023-09-01 14:18:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2023-09-01 14:18:14,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 417 transitions. [2023-09-01 14:18:14,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 417 transitions. [2023-09-01 14:18:14,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:14,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 417 transitions. [2023-09-01 14:18:14,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.5) internal successors, (417), 6 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:14,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:14,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:14,425 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 879 flow. Second operand 6 states and 417 transitions. [2023-09-01 14:18:14,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 101 transitions, 1050 flow [2023-09-01 14:18:14,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 949 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-09-01 14:18:14,436 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 724 flow [2023-09-01 14:18:14,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2023-09-01 14:18:14,436 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-09-01 14:18:14,437 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 724 flow [2023-09-01 14:18:14,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:14,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:14,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:14,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 14:18:14,644 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 [2023-09-01 14:18:14,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:14,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1447872089, now seen corresponding path program 7 times [2023-09-01 14:18:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:14,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690857171] [2023-09-01 14:18:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:14,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690857171] [2023-09-01 14:18:14,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690857171] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680192909] [2023-09-01 14:18:14,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:18:14,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:14,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:14,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:18:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680192909] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:15,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:18:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572742533] [2023-09-01 14:18:15,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:18:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:15,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:18:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:18:15,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:15,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:15,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:15,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:15,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:16,077 INFO L130 PetriNetUnfolder]: 333/677 cut-off events. [2023-09-01 14:18:16,077 INFO L131 PetriNetUnfolder]: For 8509/8509 co-relation queries the response was YES. [2023-09-01 14:18:16,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 677 events. 333/677 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3447 event pairs, 29 based on Foata normal form. 4/679 useless extension candidates. Maximal degree in co-relation 3559. Up to 272 conditions per place. [2023-09-01 14:18:16,081 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 105 selfloop transitions, 53 changer transitions 67/225 dead transitions. [2023-09-01 14:18:16,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2130 flow [2023-09-01 14:18:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:18:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:18:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2210 transitions. [2023-09-01 14:18:16,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354679802955665 [2023-09-01 14:18:16,084 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2210 transitions. [2023-09-01 14:18:16,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2210 transitions. [2023-09-01 14:18:16,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:16,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2210 transitions. [2023-09-01 14:18:16,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.142857142857146) internal successors, (2210), 35 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:16,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:16,093 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:16,093 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 724 flow. Second operand 35 states and 2210 transitions. [2023-09-01 14:18:16,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2130 flow [2023-09-01 14:18:16,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2039 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-09-01 14:18:16,117 INFO L231 Difference]: Finished difference. Result has 151 places, 98 transitions, 1039 flow [2023-09-01 14:18:16,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1039, PETRI_PLACES=151, PETRI_TRANSITIONS=98} [2023-09-01 14:18:16,118 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-09-01 14:18:16,118 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 98 transitions, 1039 flow [2023-09-01 14:18:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:16,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:16,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:16,322 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 [2023-09-01 14:18:16,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:16,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1306012647, now seen corresponding path program 8 times [2023-09-01 14:18:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:16,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808378671] [2023-09-01 14:18:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:16,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808378671] [2023-09-01 14:18:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808378671] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:16,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998020716] [2023-09-01 14:18:16,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:18:16,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:16,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:16,456 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:16,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:18:16,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:16,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:16,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:16,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998020716] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:16,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:16,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:18:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200420492] [2023-09-01 14:18:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:18:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:18:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:18:16,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:16,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 98 transitions, 1039 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:16,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:16,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:16,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:17,603 INFO L130 PetriNetUnfolder]: 291/615 cut-off events. [2023-09-01 14:18:17,604 INFO L131 PetriNetUnfolder]: For 12380/12380 co-relation queries the response was YES. [2023-09-01 14:18:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 615 events. 291/615 cut-off events. For 12380/12380 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3168 event pairs, 29 based on Foata normal form. 7/620 useless extension candidates. Maximal degree in co-relation 3930. Up to 267 conditions per place. [2023-09-01 14:18:17,608 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 113 selfloop transitions, 63 changer transitions 26/202 dead transitions. [2023-09-01 14:18:17,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2273 flow [2023-09-01 14:18:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:18:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:18:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1650 transitions. [2023-09-01 14:18:17,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2023-09-01 14:18:17,610 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1650 transitions. [2023-09-01 14:18:17,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1650 transitions. [2023-09-01 14:18:17,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:17,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1650 transitions. [2023-09-01 14:18:17,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 63.46153846153846) internal successors, (1650), 26 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:17,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:17,616 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:17,616 INFO L175 Difference]: Start difference. First operand has 151 places, 98 transitions, 1039 flow. Second operand 26 states and 1650 transitions. [2023-09-01 14:18:17,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2273 flow [2023-09-01 14:18:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 1605 flow, removed 250 selfloop flow, removed 37 redundant places. [2023-09-01 14:18:17,635 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1050 flow [2023-09-01 14:18:17,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1050, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2023-09-01 14:18:17,636 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-09-01 14:18:17,636 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1050 flow [2023-09-01 14:18:17,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:17,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:17,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:17,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 14:18:17,842 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 [2023-09-01 14:18:17,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:17,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1376530827, now seen corresponding path program 9 times [2023-09-01 14:18:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:17,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435796928] [2023-09-01 14:18:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435796928] [2023-09-01 14:18:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435796928] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380461971] [2023-09-01 14:18:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:18:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:17,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:18:18,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:18:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380461971] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:18,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:18,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:18:18,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372792757] [2023-09-01 14:18:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:18:18,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:18:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:18:18,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:18,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1050 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:18,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:18,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:18,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:19,223 INFO L130 PetriNetUnfolder]: 271/538 cut-off events. [2023-09-01 14:18:19,223 INFO L131 PetriNetUnfolder]: For 6580/6580 co-relation queries the response was YES. [2023-09-01 14:18:19,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 538 events. 271/538 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2489 event pairs, 29 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 2920. Up to 267 conditions per place. [2023-09-01 14:18:19,227 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 91 selfloop transitions, 56 changer transitions 39/186 dead transitions. [2023-09-01 14:18:19,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 1777 flow [2023-09-01 14:18:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:18:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:18:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1879 transitions. [2023-09-01 14:18:19,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43195402298850577 [2023-09-01 14:18:19,229 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1879 transitions. [2023-09-01 14:18:19,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1879 transitions. [2023-09-01 14:18:19,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:19,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1879 transitions. [2023-09-01 14:18:19,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.63333333333333) internal successors, (1879), 30 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:19,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:19,236 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:19,236 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1050 flow. Second operand 30 states and 1879 transitions. [2023-09-01 14:18:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 1777 flow [2023-09-01 14:18:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 1484 flow, removed 114 selfloop flow, removed 18 redundant places. [2023-09-01 14:18:19,250 INFO L231 Difference]: Finished difference. Result has 152 places, 107 transitions, 929 flow [2023-09-01 14:18:19,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=929, PETRI_PLACES=152, PETRI_TRANSITIONS=107} [2023-09-01 14:18:19,251 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-09-01 14:18:19,251 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 107 transitions, 929 flow [2023-09-01 14:18:19,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:19,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:19,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:19,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:19,456 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 [2023-09-01 14:18:19,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:19,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480629, now seen corresponding path program 10 times [2023-09-01 14:18:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937357038] [2023-09-01 14:18:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:19,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:19,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937357038] [2023-09-01 14:18:19,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937357038] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:19,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974634451] [2023-09-01 14:18:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:18:19,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:19,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:19,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:18:19,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:18:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:18:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974634451] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:19,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:18:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057387878] [2023-09-01 14:18:19,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:18:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:18:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:18:19,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:19,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 107 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:19,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:19,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:19,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:20,555 INFO L130 PetriNetUnfolder]: 252/497 cut-off events. [2023-09-01 14:18:20,555 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-09-01 14:18:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 497 events. 252/497 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2170 event pairs, 11 based on Foata normal form. 5/492 useless extension candidates. Maximal degree in co-relation 2536. Up to 270 conditions per place. [2023-09-01 14:18:20,558 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 121 selfloop transitions, 34 changer transitions 22/177 dead transitions. [2023-09-01 14:18:20,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 177 transitions, 1718 flow [2023-09-01 14:18:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:18:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:18:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1452 transitions. [2023-09-01 14:18:20,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353823088455772 [2023-09-01 14:18:20,561 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1452 transitions. [2023-09-01 14:18:20,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1452 transitions. [2023-09-01 14:18:20,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:20,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1452 transitions. [2023-09-01 14:18:20,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.130434782608695) internal successors, (1452), 23 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:20,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:20,566 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:20,566 INFO L175 Difference]: Start difference. First operand has 152 places, 107 transitions, 929 flow. Second operand 23 states and 1452 transitions. [2023-09-01 14:18:20,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 177 transitions, 1718 flow [2023-09-01 14:18:20,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1503 flow, removed 42 selfloop flow, removed 36 redundant places. [2023-09-01 14:18:20,576 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 872 flow [2023-09-01 14:18:20,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=872, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-09-01 14:18:20,577 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-09-01 14:18:20,577 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 872 flow [2023-09-01 14:18:20,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:20,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:20,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:20,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:20,781 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 [2023-09-01 14:18:20,782 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:20,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1918495045, now seen corresponding path program 11 times [2023-09-01 14:18:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:20,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016159460] [2023-09-01 14:18:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:20,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:20,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016159460] [2023-09-01 14:18:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016159460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:20,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50143951] [2023-09-01 14:18:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:18:20,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:20,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:20,897 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:20,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:18:20,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:18:20,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:18:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:21,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:21,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50143951] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:21,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:21,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-09-01 14:18:21,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055103470] [2023-09-01 14:18:21,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:18:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:18:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:18:21,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:21,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 872 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:21,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:21,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:21,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:21,636 INFO L130 PetriNetUnfolder]: 224/434 cut-off events. [2023-09-01 14:18:21,636 INFO L131 PetriNetUnfolder]: For 3069/3069 co-relation queries the response was YES. [2023-09-01 14:18:21,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 434 events. 224/434 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 9 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 2144. Up to 362 conditions per place. [2023-09-01 14:18:21,639 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 98 selfloop transitions, 23 changer transitions 8/129 dead transitions. [2023-09-01 14:18:21,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1214 flow [2023-09-01 14:18:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:18:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:18:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 690 transitions. [2023-09-01 14:18:21,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43260188087774293 [2023-09-01 14:18:21,640 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 690 transitions. [2023-09-01 14:18:21,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 690 transitions. [2023-09-01 14:18:21,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:21,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 690 transitions. [2023-09-01 14:18:21,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.72727272727273) internal successors, (690), 11 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:21,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:21,643 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:21,643 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 872 flow. Second operand 11 states and 690 transitions. [2023-09-01 14:18:21,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1214 flow [2023-09-01 14:18:21,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 1116 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-09-01 14:18:21,651 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 859 flow [2023-09-01 14:18:21,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-09-01 14:18:21,651 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-09-01 14:18:21,651 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 859 flow [2023-09-01 14:18:21,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:21,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:21,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:21,857 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,SelfDestructingSolverStorable12 [2023-09-01 14:18:21,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:21,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -762529050, now seen corresponding path program 12 times [2023-09-01 14:18:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:21,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900815623] [2023-09-01 14:18:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:21,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:21,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900815623] [2023-09-01 14:18:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900815623] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737170535] [2023-09-01 14:18:21,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:18:21,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:21,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:21,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:18:22,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:18:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:22,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:22,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737170535] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:22,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:22,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 14:18:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477518491] [2023-09-01 14:18:22,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:18:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:18:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:18:22,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:22,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 859 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:22,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:22,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:22,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:22,987 INFO L130 PetriNetUnfolder]: 277/546 cut-off events. [2023-09-01 14:18:22,988 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2023-09-01 14:18:22,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 546 events. 277/546 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2468 event pairs, 11 based on Foata normal form. 4/546 useless extension candidates. Maximal degree in co-relation 2651. Up to 302 conditions per place. [2023-09-01 14:18:22,991 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 71 changer transitions 28/189 dead transitions. [2023-09-01 14:18:22,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1716 flow [2023-09-01 14:18:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:18:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:18:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1509 transitions. [2023-09-01 14:18:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336206896551724 [2023-09-01 14:18:22,993 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1509 transitions. [2023-09-01 14:18:22,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1509 transitions. [2023-09-01 14:18:22,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:22,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1509 transitions. [2023-09-01 14:18:22,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:22,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:22,997 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:22,998 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 859 flow. Second operand 24 states and 1509 transitions. [2023-09-01 14:18:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1716 flow [2023-09-01 14:18:23,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1637 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-09-01 14:18:23,007 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 1208 flow [2023-09-01 14:18:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-09-01 14:18:23,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-09-01 14:18:23,008 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 1208 flow [2023-09-01 14:18:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:23,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:23,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:23,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:23,213 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,SelfDestructingSolverStorable13 [2023-09-01 14:18:23,214 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:23,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash -944601462, now seen corresponding path program 13 times [2023-09-01 14:18:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:23,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893392079] [2023-09-01 14:18:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:23,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:23,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893392079] [2023-09-01 14:18:23,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893392079] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:23,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801374620] [2023-09-01 14:18:23,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:18:23,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:23,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:18:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:23,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:23,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801374620] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:23,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 14:18:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600830411] [2023-09-01 14:18:23,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:18:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:18:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:18:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:23,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 1208 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:23,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:23,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:24,312 INFO L130 PetriNetUnfolder]: 368/739 cut-off events. [2023-09-01 14:18:24,312 INFO L131 PetriNetUnfolder]: For 5772/5772 co-relation queries the response was YES. [2023-09-01 14:18:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 739 events. 368/739 cut-off events. For 5772/5772 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3741 event pairs, 13 based on Foata normal form. 6/741 useless extension candidates. Maximal degree in co-relation 3945. Up to 205 conditions per place. [2023-09-01 14:18:24,316 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 109 selfloop transitions, 80 changer transitions 67/256 dead transitions. [2023-09-01 14:18:24,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 2591 flow [2023-09-01 14:18:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:18:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:18:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1825 transitions. [2023-09-01 14:18:24,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340071343638526 [2023-09-01 14:18:24,318 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1825 transitions. [2023-09-01 14:18:24,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1825 transitions. [2023-09-01 14:18:24,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:24,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1825 transitions. [2023-09-01 14:18:24,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.93103448275862) internal successors, (1825), 29 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:24,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:24,324 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:24,324 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 1208 flow. Second operand 29 states and 1825 transitions. [2023-09-01 14:18:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 2591 flow [2023-09-01 14:18:24,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 256 transitions, 2349 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-09-01 14:18:24,339 INFO L231 Difference]: Finished difference. Result has 173 places, 128 transitions, 1364 flow [2023-09-01 14:18:24,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1364, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2023-09-01 14:18:24,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-09-01 14:18:24,339 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1364 flow [2023-09-01 14:18:24,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:24,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:24,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:24,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:24,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:18:24,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:24,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1875183464, now seen corresponding path program 14 times [2023-09-01 14:18:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:24,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818214435] [2023-09-01 14:18:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818214435] [2023-09-01 14:18:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818214435] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:24,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137306870] [2023-09-01 14:18:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:18:24,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:24,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:24,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:18:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:24,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137306870] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:25,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 14:18:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296144907] [2023-09-01 14:18:25,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:25,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:18:25,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:18:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:18:25,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:25,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1364 flow. Second operand has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:25,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:25,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:25,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:25,866 INFO L130 PetriNetUnfolder]: 402/798 cut-off events. [2023-09-01 14:18:25,866 INFO L131 PetriNetUnfolder]: For 10464/10464 co-relation queries the response was YES. [2023-09-01 14:18:25,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 798 events. 402/798 cut-off events. For 10464/10464 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4068 event pairs, 13 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 5137. Up to 223 conditions per place. [2023-09-01 14:18:25,871 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 123 selfloop transitions, 96 changer transitions 32/251 dead transitions. [2023-09-01 14:18:25,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3165 flow [2023-09-01 14:18:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 14:18:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 14:18:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1957 transitions. [2023-09-01 14:18:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353726362625139 [2023-09-01 14:18:25,874 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1957 transitions. [2023-09-01 14:18:25,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1957 transitions. [2023-09-01 14:18:25,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:25,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1957 transitions. [2023-09-01 14:18:25,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.12903225806452) internal successors, (1957), 31 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:25,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:25,879 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:25,879 INFO L175 Difference]: Start difference. First operand has 173 places, 128 transitions, 1364 flow. Second operand 31 states and 1957 transitions. [2023-09-01 14:18:25,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3165 flow [2023-09-01 14:18:25,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 2504 flow, removed 295 selfloop flow, removed 23 redundant places. [2023-09-01 14:18:25,900 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1761 flow [2023-09-01 14:18:25,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2023-09-01 14:18:25,901 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-09-01 14:18:25,901 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1761 flow [2023-09-01 14:18:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:25,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:26,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:26,108 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:26,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1804665284, now seen corresponding path program 15 times [2023-09-01 14:18:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373112649] [2023-09-01 14:18:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373112649] [2023-09-01 14:18:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373112649] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292355801] [2023-09-01 14:18:26,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:18:26,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:26,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:26,253 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:26,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:18:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:18:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:26,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292355801] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:26,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 14:18:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242845674] [2023-09-01 14:18:26,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:26,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:18:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:18:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:18:26,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:26,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1761 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:26,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:26,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:26,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:27,465 INFO L130 PetriNetUnfolder]: 371/747 cut-off events. [2023-09-01 14:18:27,466 INFO L131 PetriNetUnfolder]: For 9071/9071 co-relation queries the response was YES. [2023-09-01 14:18:27,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 747 events. 371/747 cut-off events. For 9071/9071 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3741 event pairs, 11 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4675. Up to 221 conditions per place. [2023-09-01 14:18:27,470 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 120 selfloop transitions, 98 changer transitions 31/249 dead transitions. [2023-09-01 14:18:27,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2918 flow [2023-09-01 14:18:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:18:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:18:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1833 transitions. [2023-09-01 14:18:27,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359096313912009 [2023-09-01 14:18:27,472 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1833 transitions. [2023-09-01 14:18:27,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1833 transitions. [2023-09-01 14:18:27,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:27,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1833 transitions. [2023-09-01 14:18:27,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 63.206896551724135) internal successors, (1833), 29 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:27,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:27,477 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:27,477 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1761 flow. Second operand 29 states and 1833 transitions. [2023-09-01 14:18:27,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2918 flow [2023-09-01 14:18:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2458 flow, removed 177 selfloop flow, removed 18 redundant places. [2023-09-01 14:18:27,496 INFO L231 Difference]: Finished difference. Result has 190 places, 154 transitions, 1710 flow [2023-09-01 14:18:27,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2023-09-01 14:18:27,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-09-01 14:18:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1710 flow [2023-09-01 14:18:27,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:27,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:27,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:27,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:27,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:18:27,702 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:27,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1268773024, now seen corresponding path program 16 times [2023-09-01 14:18:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:27,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488708997] [2023-09-01 14:18:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:27,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488708997] [2023-09-01 14:18:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488708997] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061077738] [2023-09-01 14:18:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:18:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:27,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:27,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:18:27,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:18:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:27,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061077738] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:28,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:28,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-09-01 14:18:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765371499] [2023-09-01 14:18:28,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:18:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:18:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:18:28,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:28,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1710 flow. Second operand has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:28,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:28,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:28,823 INFO L130 PetriNetUnfolder]: 394/790 cut-off events. [2023-09-01 14:18:28,823 INFO L131 PetriNetUnfolder]: For 10103/10103 co-relation queries the response was YES. [2023-09-01 14:18:28,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 790 events. 394/790 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3994 event pairs, 15 based on Foata normal form. 5/791 useless extension candidates. Maximal degree in co-relation 4945. Up to 511 conditions per place. [2023-09-01 14:18:28,828 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 157 selfloop transitions, 41 changer transitions 41/239 dead transitions. [2023-09-01 14:18:28,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 239 transitions, 2764 flow [2023-09-01 14:18:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:18:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:18:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1623 transitions. [2023-09-01 14:18:28,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43050397877984087 [2023-09-01 14:18:28,830 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1623 transitions. [2023-09-01 14:18:28,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1623 transitions. [2023-09-01 14:18:28,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:28,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1623 transitions. [2023-09-01 14:18:28,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 62.42307692307692) internal successors, (1623), 26 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:28,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:28,835 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:28,835 INFO L175 Difference]: Start difference. First operand has 190 places, 154 transitions, 1710 flow. Second operand 26 states and 1623 transitions. [2023-09-01 14:18:28,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 239 transitions, 2764 flow [2023-09-01 14:18:28,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 239 transitions, 2488 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-09-01 14:18:28,854 INFO L231 Difference]: Finished difference. Result has 194 places, 157 transitions, 1684 flow [2023-09-01 14:18:28,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1684, PETRI_PLACES=194, PETRI_TRANSITIONS=157} [2023-09-01 14:18:28,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-09-01 14:18:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 157 transitions, 1684 flow [2023-09-01 14:18:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:28,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:28,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:29,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:18:29,060 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:29,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1188036426, now seen corresponding path program 17 times [2023-09-01 14:18:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948986375] [2023-09-01 14:18:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:29,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948986375] [2023-09-01 14:18:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948986375] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565857361] [2023-09-01 14:18:29,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:18:29,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:29,195 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:29,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:18:29,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:18:29,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:29,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:29,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565857361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:29,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 14:18:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950557459] [2023-09-01 14:18:29,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:18:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:18:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:18:29,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:29,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 157 transitions, 1684 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:29,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:29,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:29,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:30,295 INFO L130 PetriNetUnfolder]: 466/942 cut-off events. [2023-09-01 14:18:30,295 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-09-01 14:18:30,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 942 events. 466/942 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4987 event pairs, 19 based on Foata normal form. 7/945 useless extension candidates. Maximal degree in co-relation 6269. Up to 517 conditions per place. [2023-09-01 14:18:30,300 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 178 selfloop transitions, 57 changer transitions 32/267 dead transitions. [2023-09-01 14:18:30,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3232 flow [2023-09-01 14:18:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 14:18:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 14:18:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1698 transitions. [2023-09-01 14:18:30,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337164750957854 [2023-09-01 14:18:30,302 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1698 transitions. [2023-09-01 14:18:30,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1698 transitions. [2023-09-01 14:18:30,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:30,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1698 transitions. [2023-09-01 14:18:30,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:30,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:30,307 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:30,307 INFO L175 Difference]: Start difference. First operand has 194 places, 157 transitions, 1684 flow. Second operand 27 states and 1698 transitions. [2023-09-01 14:18:30,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3232 flow [2023-09-01 14:18:30,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 267 transitions, 2923 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-09-01 14:18:30,333 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2008 flow [2023-09-01 14:18:30,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2008, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2023-09-01 14:18:30,333 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-09-01 14:18:30,333 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2008 flow [2023-09-01 14:18:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:30,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:30,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:30,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:30,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:30,538 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:30,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2122586034, now seen corresponding path program 18 times [2023-09-01 14:18:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:30,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027862788] [2023-09-01 14:18:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:30,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027862788] [2023-09-01 14:18:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027862788] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600290283] [2023-09-01 14:18:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:18:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:30,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:30,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:30,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:18:30,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:18:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:18:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:30,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600290283] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:30,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 14:18:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808747499] [2023-09-01 14:18:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:30,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:18:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:18:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:18:31,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:31,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:31,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:31,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:31,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:32,004 INFO L130 PetriNetUnfolder]: 556/1126 cut-off events. [2023-09-01 14:18:32,004 INFO L131 PetriNetUnfolder]: For 22866/22866 co-relation queries the response was YES. [2023-09-01 14:18:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1126 events. 556/1126 cut-off events. For 22866/22866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6267 event pairs, 25 based on Foata normal form. 5/1127 useless extension candidates. Maximal degree in co-relation 7887. Up to 616 conditions per place. [2023-09-01 14:18:32,011 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 191 selfloop transitions, 68 changer transitions 39/298 dead transitions. [2023-09-01 14:18:32,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3805 flow [2023-09-01 14:18:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 14:18:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 14:18:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1711 transitions. [2023-09-01 14:18:32,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-09-01 14:18:32,021 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1711 transitions. [2023-09-01 14:18:32,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1711 transitions. [2023-09-01 14:18:32,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:32,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1711 transitions. [2023-09-01 14:18:32,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.370370370370374) internal successors, (1711), 27 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:32,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:32,027 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:32,028 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2008 flow. Second operand 27 states and 1711 transitions. [2023-09-01 14:18:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3805 flow [2023-09-01 14:18:32,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 298 transitions, 3518 flow, removed 121 selfloop flow, removed 16 redundant places. [2023-09-01 14:18:32,071 INFO L231 Difference]: Finished difference. Result has 222 places, 196 transitions, 2493 flow [2023-09-01 14:18:32,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2493, PETRI_PLACES=222, PETRI_TRANSITIONS=196} [2023-09-01 14:18:32,072 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-09-01 14:18:32,072 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 196 transitions, 2493 flow [2023-09-01 14:18:32,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:32,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:32,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:32,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:32,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 56355927, now seen corresponding path program 19 times [2023-09-01 14:18:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044857322] [2023-09-01 14:18:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:32,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044857322] [2023-09-01 14:18:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044857322] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617522627] [2023-09-01 14:18:32,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:18:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:32,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:32,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:18:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:18:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:32,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617522627] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:32,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:32,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 14:18:32,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849137853] [2023-09-01 14:18:32,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:32,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 14:18:32,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 14:18:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-09-01 14:18:32,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:32,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 196 transitions, 2493 flow. Second operand has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:32,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:32,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:32,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:34,001 INFO L130 PetriNetUnfolder]: 743/1452 cut-off events. [2023-09-01 14:18:34,001 INFO L131 PetriNetUnfolder]: For 36204/36204 co-relation queries the response was YES. [2023-09-01 14:18:34,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10999 conditions, 1452 events. 743/1452 cut-off events. For 36204/36204 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8361 event pairs, 37 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 10923. Up to 581 conditions per place. [2023-09-01 14:18:34,010 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 189 selfloop transitions, 149 changer transitions 36/374 dead transitions. [2023-09-01 14:18:34,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 4925 flow [2023-09-01 14:18:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 14:18:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 14:18:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2388 transitions. [2023-09-01 14:18:34,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43339382940108895 [2023-09-01 14:18:34,014 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2388 transitions. [2023-09-01 14:18:34,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2388 transitions. [2023-09-01 14:18:34,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:34,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2388 transitions. [2023-09-01 14:18:34,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.8421052631579) internal successors, (2388), 38 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:34,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:34,019 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:34,019 INFO L175 Difference]: Start difference. First operand has 222 places, 196 transitions, 2493 flow. Second operand 38 states and 2388 transitions. [2023-09-01 14:18:34,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 4925 flow [2023-09-01 14:18:34,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 4570 flow, removed 145 selfloop flow, removed 15 redundant places. [2023-09-01 14:18:34,117 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 3451 flow [2023-09-01 14:18:34,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3451, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2023-09-01 14:18:34,117 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-09-01 14:18:34,118 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 3451 flow [2023-09-01 14:18:34,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:34,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:34,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:34,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 14:18:34,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:34,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:34,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -376590837, now seen corresponding path program 20 times [2023-09-01 14:18:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:34,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789235061] [2023-09-01 14:18:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:34,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:34,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789235061] [2023-09-01 14:18:34,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789235061] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:34,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707114159] [2023-09-01 14:18:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:18:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:34,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:34,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:18:34,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:34,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:18:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707114159] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:34,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:34,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-09-01 14:18:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876129843] [2023-09-01 14:18:34,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:18:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:18:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:18:34,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:34,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 3451 flow. Second operand has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:34,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:34,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:34,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:36,075 INFO L130 PetriNetUnfolder]: 1024/1951 cut-off events. [2023-09-01 14:18:36,076 INFO L131 PetriNetUnfolder]: For 66721/66721 co-relation queries the response was YES. [2023-09-01 14:18:36,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17262 conditions, 1951 events. 1024/1951 cut-off events. For 66721/66721 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11822 event pairs, 63 based on Foata normal form. 16/1963 useless extension candidates. Maximal degree in co-relation 17179. Up to 915 conditions per place. [2023-09-01 14:18:36,088 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 256 selfloop transitions, 118 changer transitions 89/463 dead transitions. [2023-09-01 14:18:36,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7305 flow [2023-09-01 14:18:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 14:18:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 14:18:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2870 transitions. [2023-09-01 14:18:36,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302848575712144 [2023-09-01 14:18:36,092 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2870 transitions. [2023-09-01 14:18:36,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2870 transitions. [2023-09-01 14:18:36,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:36,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2870 transitions. [2023-09-01 14:18:36,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.391304347826086) internal successors, (2870), 46 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:36,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:36,099 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:36,099 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 3451 flow. Second operand 46 states and 2870 transitions. [2023-09-01 14:18:36,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7305 flow [2023-09-01 14:18:36,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 463 transitions, 6297 flow, removed 432 selfloop flow, removed 25 redundant places. [2023-09-01 14:18:36,237 INFO L231 Difference]: Finished difference. Result has 282 places, 270 transitions, 3999 flow [2023-09-01 14:18:36,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3999, PETRI_PLACES=282, PETRI_TRANSITIONS=270} [2023-09-01 14:18:36,237 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-09-01 14:18:36,238 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 270 transitions, 3999 flow [2023-09-01 14:18:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:36,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:36,238 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:36,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:36,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 14:18:36,441 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:36,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:36,441 INFO L85 PathProgramCache]: Analyzing trace with hash -857253995, now seen corresponding path program 21 times [2023-09-01 14:18:36,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:36,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036216576] [2023-09-01 14:18:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036216576] [2023-09-01 14:18:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036216576] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:36,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811688324] [2023-09-01 14:18:36,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:18:36,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:36,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:36,563 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:36,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:18:36,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:18:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:18:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:18:36,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811688324] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:36,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:36,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2023-09-01 14:18:36,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581799263] [2023-09-01 14:18:36,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:36,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:18:36,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:36,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:18:36,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:18:37,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:37,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 270 transitions, 3999 flow. Second operand has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:37,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:37,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:37,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:38,503 INFO L130 PetriNetUnfolder]: 1208/2243 cut-off events. [2023-09-01 14:18:38,503 INFO L131 PetriNetUnfolder]: For 95392/95392 co-relation queries the response was YES. [2023-09-01 14:18:38,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 2243 events. 1208/2243 cut-off events. For 95392/95392 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13533 event pairs, 83 based on Foata normal form. 8/2247 useless extension candidates. Maximal degree in co-relation 21847. Up to 1364 conditions per place. [2023-09-01 14:18:38,520 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 291 selfloop transitions, 162 changer transitions 32/485 dead transitions. [2023-09-01 14:18:38,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 485 transitions, 8434 flow [2023-09-01 14:18:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 14:18:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 14:18:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2806 transitions. [2023-09-01 14:18:38,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300383141762452 [2023-09-01 14:18:38,527 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2806 transitions. [2023-09-01 14:18:38,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2806 transitions. [2023-09-01 14:18:38,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:38,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2806 transitions. [2023-09-01 14:18:38,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.355555555555554) internal successors, (2806), 45 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:38,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:38,533 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:38,533 INFO L175 Difference]: Start difference. First operand has 282 places, 270 transitions, 3999 flow. Second operand 45 states and 2806 transitions. [2023-09-01 14:18:38,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 485 transitions, 8434 flow [2023-09-01 14:18:38,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 485 transitions, 7272 flow, removed 500 selfloop flow, removed 34 redundant places. [2023-09-01 14:18:38,759 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5741 flow [2023-09-01 14:18:38,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5741, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2023-09-01 14:18:38,760 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2023-09-01 14:18:38,760 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5741 flow [2023-09-01 14:18:38,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:38,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:38,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:38,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 14:18:38,961 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:38,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1236654659, now seen corresponding path program 22 times [2023-09-01 14:18:38,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:38,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305923639] [2023-09-01 14:18:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:38,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305923639] [2023-09-01 14:18:39,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305923639] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438093587] [2023-09-01 14:18:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:18:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:39,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:18:39,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:18:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:18:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:39,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438093587] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:39,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:18:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260359972] [2023-09-01 14:18:39,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:39,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:18:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:18:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:18:39,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:39,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5741 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:39,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:39,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:39,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:41,059 INFO L130 PetriNetUnfolder]: 1239/2321 cut-off events. [2023-09-01 14:18:41,059 INFO L131 PetriNetUnfolder]: For 105658/105658 co-relation queries the response was YES. [2023-09-01 14:18:41,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2321 events. 1239/2321 cut-off events. For 105658/105658 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14077 event pairs, 63 based on Foata normal form. 11/2328 useless extension candidates. Maximal degree in co-relation 22455. Up to 1049 conditions per place. [2023-09-01 14:18:41,076 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 309 selfloop transitions, 180 changer transitions 33/522 dead transitions. [2023-09-01 14:18:41,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 522 transitions, 9259 flow [2023-09-01 14:18:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 14:18:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 14:18:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2627 transitions. [2023-09-01 14:18:41,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43136288998357963 [2023-09-01 14:18:41,079 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2627 transitions. [2023-09-01 14:18:41,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2627 transitions. [2023-09-01 14:18:41,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:41,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2627 transitions. [2023-09-01 14:18:41,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 62.54761904761905) internal successors, (2627), 42 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:41,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:41,085 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:41,085 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5741 flow. Second operand 42 states and 2627 transitions. [2023-09-01 14:18:41,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 522 transitions, 9259 flow [2023-09-01 14:18:41,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 522 transitions, 7914 flow, removed 626 selfloop flow, removed 25 redundant places. [2023-09-01 14:18:41,368 INFO L231 Difference]: Finished difference. Result has 312 places, 363 transitions, 5781 flow [2023-09-01 14:18:41,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5781, PETRI_PLACES=312, PETRI_TRANSITIONS=363} [2023-09-01 14:18:41,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-09-01 14:18:41,369 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 363 transitions, 5781 flow [2023-09-01 14:18:41,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:41,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:41,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:41,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:41,573 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:41,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1224381777, now seen corresponding path program 23 times [2023-09-01 14:18:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209811206] [2023-09-01 14:18:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:41,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209811206] [2023-09-01 14:18:41,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209811206] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:41,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814346013] [2023-09-01 14:18:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:18:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:41,703 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:41,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:18:41,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:18:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:18:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:41,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814346013] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:42,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:18:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778509790] [2023-09-01 14:18:42,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:18:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:18:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:18:42,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:42,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 363 transitions, 5781 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:42,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:42,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:44,265 INFO L130 PetriNetUnfolder]: 1665/3168 cut-off events. [2023-09-01 14:18:44,265 INFO L131 PetriNetUnfolder]: For 159603/159603 co-relation queries the response was YES. [2023-09-01 14:18:44,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3168 events. 1665/3168 cut-off events. For 159603/159603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21180 event pairs, 57 based on Foata normal form. 26/3190 useless extension candidates. Maximal degree in co-relation 31709. Up to 1694 conditions per place. [2023-09-01 14:18:44,290 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 409 selfloop transitions, 190 changer transitions 74/673 dead transitions. [2023-09-01 14:18:44,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 673 transitions, 11632 flow [2023-09-01 14:18:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-09-01 14:18:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-09-01 14:18:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3464 transitions. [2023-09-01 14:18:44,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343573667711599 [2023-09-01 14:18:44,293 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3464 transitions. [2023-09-01 14:18:44,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3464 transitions. [2023-09-01 14:18:44,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:44,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3464 transitions. [2023-09-01 14:18:44,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 62.981818181818184) internal successors, (3464), 55 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:44,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:44,300 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:44,300 INFO L175 Difference]: Start difference. First operand has 312 places, 363 transitions, 5781 flow. Second operand 55 states and 3464 transitions. [2023-09-01 14:18:44,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 673 transitions, 11632 flow [2023-09-01 14:18:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 673 transitions, 11103 flow, removed 156 selfloop flow, removed 30 redundant places. [2023-09-01 14:18:44,711 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 8710 flow [2023-09-01 14:18:44,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8710, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2023-09-01 14:18:44,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-09-01 14:18:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 8710 flow [2023-09-01 14:18:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:44,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:44,712 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:44,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:44,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:44,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:44,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1590475332, now seen corresponding path program 24 times [2023-09-01 14:18:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010668674] [2023-09-01 14:18:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010668674] [2023-09-01 14:18:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010668674] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497568450] [2023-09-01 14:18:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:18:45,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:45,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 14:18:45,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:18:45,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:18:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:45,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497568450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:45,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:45,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-09-01 14:18:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62972011] [2023-09-01 14:18:45,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:45,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:18:45,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:18:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:18:45,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:45,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 8710 flow. Second operand has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:45,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:45,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:45,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:48,295 INFO L130 PetriNetUnfolder]: 2973/5695 cut-off events. [2023-09-01 14:18:48,295 INFO L131 PetriNetUnfolder]: For 363228/363228 co-relation queries the response was YES. [2023-09-01 14:18:48,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65947 conditions, 5695 events. 2973/5695 cut-off events. For 363228/363228 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43216 event pairs, 99 based on Foata normal form. 39/5730 useless extension candidates. Maximal degree in co-relation 65835. Up to 1775 conditions per place. [2023-09-01 14:18:48,347 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 476 selfloop transitions, 439 changer transitions 90/1005 dead transitions. [2023-09-01 14:18:48,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1005 transitions, 20173 flow [2023-09-01 14:18:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 14:18:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 14:18:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3353 transitions. [2023-09-01 14:18:48,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363044892648016 [2023-09-01 14:18:48,350 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3353 transitions. [2023-09-01 14:18:48,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3353 transitions. [2023-09-01 14:18:48,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:48,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3353 transitions. [2023-09-01 14:18:48,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 63.264150943396224) internal successors, (3353), 53 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:48,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:48,357 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:48,357 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 8710 flow. Second operand 53 states and 3353 transitions. [2023-09-01 14:18:48,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1005 transitions, 20173 flow [2023-09-01 14:18:49,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1005 transitions, 17491 flow, removed 1243 selfloop flow, removed 31 redundant places. [2023-09-01 14:18:49,263 INFO L231 Difference]: Finished difference. Result has 371 places, 750 transitions, 13577 flow [2023-09-01 14:18:49,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13577, PETRI_PLACES=371, PETRI_TRANSITIONS=750} [2023-09-01 14:18:49,264 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2023-09-01 14:18:49,264 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 750 transitions, 13577 flow [2023-09-01 14:18:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:49,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:49,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:49,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:49,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 14:18:49,468 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:49,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1528243986, now seen corresponding path program 25 times [2023-09-01 14:18:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:49,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767096357] [2023-09-01 14:18:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:49,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767096357] [2023-09-01 14:18:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767096357] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189406833] [2023-09-01 14:18:49,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:18:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:49,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:49,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:49,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 14:18:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:18:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:49,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:50,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189406833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:50,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:50,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-09-01 14:18:50,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462304429] [2023-09-01 14:18:50,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:18:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:18:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:18:50,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:50,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 750 transitions, 13577 flow. Second operand has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:50,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:50,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:50,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:53,154 INFO L130 PetriNetUnfolder]: 3346/6465 cut-off events. [2023-09-01 14:18:53,154 INFO L131 PetriNetUnfolder]: For 341006/341006 co-relation queries the response was YES. [2023-09-01 14:18:53,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73310 conditions, 6465 events. 3346/6465 cut-off events. For 341006/341006 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50467 event pairs, 173 based on Foata normal form. 45/6506 useless extension candidates. Maximal degree in co-relation 73189. Up to 3403 conditions per place. [2023-09-01 14:18:53,207 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 567 selfloop transitions, 284 changer transitions 183/1034 dead transitions. [2023-09-01 14:18:53,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1034 transitions, 21725 flow [2023-09-01 14:18:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 14:18:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 14:18:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2804 transitions. [2023-09-01 14:18:53,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42973180076628353 [2023-09-01 14:18:53,210 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2804 transitions. [2023-09-01 14:18:53,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2804 transitions. [2023-09-01 14:18:53,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:53,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2804 transitions. [2023-09-01 14:18:53,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.31111111111111) internal successors, (2804), 45 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:53,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:53,215 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:53,215 INFO L175 Difference]: Start difference. First operand has 371 places, 750 transitions, 13577 flow. Second operand 45 states and 2804 transitions. [2023-09-01 14:18:53,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1034 transitions, 21725 flow [2023-09-01 14:18:54,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1034 transitions, 19051 flow, removed 1271 selfloop flow, removed 29 redundant places. [2023-09-01 14:18:54,539 INFO L231 Difference]: Finished difference. Result has 399 places, 763 transitions, 13433 flow [2023-09-01 14:18:54,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13433, PETRI_PLACES=399, PETRI_TRANSITIONS=763} [2023-09-01 14:18:54,539 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-09-01 14:18:54,540 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 763 transitions, 13433 flow [2023-09-01 14:18:54,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:54,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:54,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:54,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:54,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 14:18:54,740 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:54,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash 834360269, now seen corresponding path program 26 times [2023-09-01 14:18:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41486491] [2023-09-01 14:18:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:54,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41486491] [2023-09-01 14:18:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41486491] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532372065] [2023-09-01 14:18:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:18:54,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:54,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 14:18:55,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:55,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:18:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:55,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532372065] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:55,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-09-01 14:18:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151953903] [2023-09-01 14:18:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:55,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:18:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:18:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-09-01 14:18:55,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:18:55,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 763 transitions, 13433 flow. Second operand has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:55,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:55,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:18:55,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:57,869 INFO L130 PetriNetUnfolder]: 2635/5302 cut-off events. [2023-09-01 14:18:57,869 INFO L131 PetriNetUnfolder]: For 177078/177078 co-relation queries the response was YES. [2023-09-01 14:18:57,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 5302 events. 2635/5302 cut-off events. For 177078/177078 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41478 event pairs, 81 based on Foata normal form. 30/5328 useless extension candidates. Maximal degree in co-relation 50059. Up to 1415 conditions per place. [2023-09-01 14:18:57,925 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 416 selfloop transitions, 422 changer transitions 155/993 dead transitions. [2023-09-01 14:18:57,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 993 transitions, 19676 flow [2023-09-01 14:18:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 14:18:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 14:18:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2812 transitions. [2023-09-01 14:18:57,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43095785440613027 [2023-09-01 14:18:57,928 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2812 transitions. [2023-09-01 14:18:57,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2812 transitions. [2023-09-01 14:18:57,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:57,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2812 transitions. [2023-09-01 14:18:57,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.48888888888889) internal successors, (2812), 45 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:57,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:57,934 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:57,934 INFO L175 Difference]: Start difference. First operand has 399 places, 763 transitions, 13433 flow. Second operand 45 states and 2812 transitions. [2023-09-01 14:18:57,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 993 transitions, 19676 flow [2023-09-01 14:18:58,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 993 transitions, 18505 flow, removed 499 selfloop flow, removed 39 redundant places. [2023-09-01 14:18:59,010 INFO L231 Difference]: Finished difference. Result has 402 places, 749 transitions, 14038 flow [2023-09-01 14:18:59,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14038, PETRI_PLACES=402, PETRI_TRANSITIONS=749} [2023-09-01 14:18:59,011 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-09-01 14:18:59,011 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 749 transitions, 14038 flow [2023-09-01 14:18:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:59,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:59,011 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:59,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 14:18:59,215 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:18:59,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash -25703553, now seen corresponding path program 27 times [2023-09-01 14:18:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98953532] [2023-09-01 14:18:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:59,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98953532] [2023-09-01 14:18:59,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98953532] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664969234] [2023-09-01 14:18:59,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:18:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:59,407 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:59,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 14:18:59,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:18:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:18:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:59,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664969234] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:59,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:59,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-09-01 14:18:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715961261] [2023-09-01 14:18:59,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:59,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:18:59,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:18:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-09-01 14:19:00,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:00,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 749 transitions, 14038 flow. Second operand has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:00,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:00,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:02,345 INFO L130 PetriNetUnfolder]: 2416/4845 cut-off events. [2023-09-01 14:19:02,345 INFO L131 PetriNetUnfolder]: For 160642/160642 co-relation queries the response was YES. [2023-09-01 14:19:02,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 4845 events. 2416/4845 cut-off events. For 160642/160642 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37225 event pairs, 83 based on Foata normal form. 28/4869 useless extension candidates. Maximal degree in co-relation 45835. Up to 1415 conditions per place. [2023-09-01 14:19:02,388 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 397 selfloop transitions, 429 changer transitions 52/878 dead transitions. [2023-09-01 14:19:02,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 878 transitions, 16975 flow [2023-09-01 14:19:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:19:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:19:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2745 transitions. [2023-09-01 14:19:02,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43025078369905956 [2023-09-01 14:19:02,390 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2745 transitions. [2023-09-01 14:19:02,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2745 transitions. [2023-09-01 14:19:02,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:02,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2745 transitions. [2023-09-01 14:19:02,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.38636363636363) internal successors, (2745), 44 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:02,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:02,396 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:02,396 INFO L175 Difference]: Start difference. First operand has 402 places, 749 transitions, 14038 flow. Second operand 44 states and 2745 transitions. [2023-09-01 14:19:02,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 878 transitions, 16975 flow [2023-09-01 14:19:03,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 878 transitions, 15765 flow, removed 492 selfloop flow, removed 38 redundant places. [2023-09-01 14:19:03,389 INFO L231 Difference]: Finished difference. Result has 399 places, 743 transitions, 13814 flow [2023-09-01 14:19:03,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12973, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13814, PETRI_PLACES=399, PETRI_TRANSITIONS=743} [2023-09-01 14:19:03,390 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-09-01 14:19:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 743 transitions, 13814 flow [2023-09-01 14:19:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:03,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:03,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:03,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 14:19:03,595 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:03,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash 125395759, now seen corresponding path program 28 times [2023-09-01 14:19:03,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:03,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81894482] [2023-09-01 14:19:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:03,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:03,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81894482] [2023-09-01 14:19:03,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81894482] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164771152] [2023-09-01 14:19:03,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:19:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:03,783 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:03,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 14:19:03,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:19:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:19:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:03,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164771152] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:04,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-09-01 14:19:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476371395] [2023-09-01 14:19:04,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:19:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:19:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-09-01 14:19:04,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:04,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 743 transitions, 13814 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:04,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:04,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:04,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:07,473 INFO L130 PetriNetUnfolder]: 3625/6950 cut-off events. [2023-09-01 14:19:07,474 INFO L131 PetriNetUnfolder]: For 199928/199928 co-relation queries the response was YES. [2023-09-01 14:19:07,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67025 conditions, 6950 events. 3625/6950 cut-off events. For 199928/199928 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53940 event pairs, 171 based on Foata normal form. 50/6996 useless extension candidates. Maximal degree in co-relation 66903. Up to 1805 conditions per place. [2023-09-01 14:19:07,531 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 364 selfloop transitions, 558 changer transitions 384/1306 dead transitions. [2023-09-01 14:19:07,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1306 transitions, 28646 flow [2023-09-01 14:19:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 14:19:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 14:19:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3240 transitions. [2023-09-01 14:19:07,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297082228116711 [2023-09-01 14:19:07,534 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3240 transitions. [2023-09-01 14:19:07,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3240 transitions. [2023-09-01 14:19:07,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:07,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3240 transitions. [2023-09-01 14:19:07,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 62.30769230769231) internal successors, (3240), 52 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:07,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:07,540 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:07,540 INFO L175 Difference]: Start difference. First operand has 399 places, 743 transitions, 13814 flow. Second operand 52 states and 3240 transitions. [2023-09-01 14:19:07,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1306 transitions, 28646 flow [2023-09-01 14:19:08,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 26993 flow, removed 165 selfloop flow, removed 39 redundant places. [2023-09-01 14:19:08,519 INFO L231 Difference]: Finished difference. Result has 414 places, 812 transitions, 16633 flow [2023-09-01 14:19:08,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16633, PETRI_PLACES=414, PETRI_TRANSITIONS=812} [2023-09-01 14:19:08,520 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-09-01 14:19:08,520 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 812 transitions, 16633 flow [2023-09-01 14:19:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:08,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:08,520 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:08,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 14:19:08,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:08,724 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:08,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1213169703, now seen corresponding path program 29 times [2023-09-01 14:19:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:08,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387750597] [2023-09-01 14:19:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387750597] [2023-09-01 14:19:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387750597] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176594226] [2023-09-01 14:19:08,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:19:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:08,904 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:08,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 14:19:08,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:19:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:08,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:19:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:09,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176594226] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:09,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-09-01 14:19:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51246587] [2023-09-01 14:19:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:19:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:19:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-09-01 14:19:09,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:09,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 812 transitions, 16633 flow. Second operand has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:09,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:09,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:09,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:12,588 INFO L130 PetriNetUnfolder]: 2999/5935 cut-off events. [2023-09-01 14:19:12,588 INFO L131 PetriNetUnfolder]: For 160320/160320 co-relation queries the response was YES. [2023-09-01 14:19:12,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 5935 events. 2999/5935 cut-off events. For 160320/160320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45872 event pairs, 151 based on Foata normal form. 29/5960 useless extension candidates. Maximal degree in co-relation 56103. Up to 3402 conditions per place. [2023-09-01 14:19:12,651 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 719 selfloop transitions, 234 changer transitions 149/1102 dead transitions. [2023-09-01 14:19:12,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1102 transitions, 22714 flow [2023-09-01 14:19:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 14:19:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 14:19:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2868 transitions. [2023-09-01 14:19:12,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42998500749625185 [2023-09-01 14:19:12,654 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2868 transitions. [2023-09-01 14:19:12,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2868 transitions. [2023-09-01 14:19:12,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:12,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2868 transitions. [2023-09-01 14:19:12,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.34782608695652) internal successors, (2868), 46 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:12,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:12,660 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:12,661 INFO L175 Difference]: Start difference. First operand has 414 places, 812 transitions, 16633 flow. Second operand 46 states and 2868 transitions. [2023-09-01 14:19:12,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1102 transitions, 22714 flow [2023-09-01 14:19:13,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1102 transitions, 20479 flow, removed 858 selfloop flow, removed 47 redundant places. [2023-09-01 14:19:13,983 INFO L231 Difference]: Finished difference. Result has 403 places, 873 transitions, 16702 flow [2023-09-01 14:19:13,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=14940, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16702, PETRI_PLACES=403, PETRI_TRANSITIONS=873} [2023-09-01 14:19:13,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-09-01 14:19:13,984 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 873 transitions, 16702 flow [2023-09-01 14:19:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:13,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:13,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:14,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:14,188 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:14,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash -808262398, now seen corresponding path program 30 times [2023-09-01 14:19:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:14,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627877252] [2023-09-01 14:19:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:14,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:14,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627877252] [2023-09-01 14:19:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627877252] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008622274] [2023-09-01 14:19:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:19:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:14,360 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:14,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 14:19:14,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:19:14,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 14:19:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:14,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008622274] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:14,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2023-09-01 14:19:14,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109546251] [2023-09-01 14:19:14,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:14,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 14:19:14,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 14:19:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-09-01 14:19:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:15,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 873 transitions, 16702 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:15,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:15,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:17,546 INFO L130 PetriNetUnfolder]: 2565/5240 cut-off events. [2023-09-01 14:19:17,546 INFO L131 PetriNetUnfolder]: For 111733/111733 co-relation queries the response was YES. [2023-09-01 14:19:17,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 5240 events. 2565/5240 cut-off events. For 111733/111733 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40939 event pairs, 77 based on Foata normal form. 64/5300 useless extension candidates. Maximal degree in co-relation 46155. Up to 1509 conditions per place. [2023-09-01 14:19:17,595 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 457 selfloop transitions, 512 changer transitions 72/1041 dead transitions. [2023-09-01 14:19:17,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1041 transitions, 21050 flow [2023-09-01 14:19:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 14:19:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 14:19:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3034 transitions. [2023-09-01 14:19:17,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702322308233637 [2023-09-01 14:19:17,598 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3034 transitions. [2023-09-01 14:19:17,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3034 transitions. [2023-09-01 14:19:17,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:17,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3034 transitions. [2023-09-01 14:19:17,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 61.91836734693877) internal successors, (3034), 49 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:17,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:17,609 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:17,609 INFO L175 Difference]: Start difference. First operand has 403 places, 873 transitions, 16702 flow. Second operand 49 states and 3034 transitions. [2023-09-01 14:19:17,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1041 transitions, 21050 flow [2023-09-01 14:19:18,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1041 transitions, 20410 flow, removed 268 selfloop flow, removed 32 redundant places. [2023-09-01 14:19:18,408 INFO L231 Difference]: Finished difference. Result has 412 places, 891 transitions, 18343 flow [2023-09-01 14:19:18,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18343, PETRI_PLACES=412, PETRI_TRANSITIONS=891} [2023-09-01 14:19:18,409 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-09-01 14:19:18,409 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 891 transitions, 18343 flow [2023-09-01 14:19:18,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:18,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:18,409 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:18,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:18,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 14:19:18,613 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:18,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1662152656, now seen corresponding path program 31 times [2023-09-01 14:19:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:18,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180679408] [2023-09-01 14:19:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:18,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180679408] [2023-09-01 14:19:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180679408] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:18,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125511599] [2023-09-01 14:19:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:19:18,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:18,805 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:18,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 14:19:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 14:19:18,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125511599] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:19,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2023-09-01 14:19:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719452864] [2023-09-01 14:19:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:19:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:19:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-09-01 14:19:19,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:19,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 891 transitions, 18343 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:19,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:19,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:21,901 INFO L130 PetriNetUnfolder]: 2335/4642 cut-off events. [2023-09-01 14:19:21,901 INFO L131 PetriNetUnfolder]: For 85783/85783 co-relation queries the response was YES. [2023-09-01 14:19:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 4642 events. 2335/4642 cut-off events. For 85783/85783 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34274 event pairs, 3 based on Foata normal form. 30/4668 useless extension candidates. Maximal degree in co-relation 41612. Up to 2668 conditions per place. [2023-09-01 14:19:21,945 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 752 selfloop transitions, 259 changer transitions 50/1061 dead transitions. [2023-09-01 14:19:21,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1061 transitions, 22180 flow [2023-09-01 14:19:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 14:19:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 14:19:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2376 transitions. [2023-09-01 14:19:21,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43121597096188746 [2023-09-01 14:19:21,947 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2376 transitions. [2023-09-01 14:19:21,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2376 transitions. [2023-09-01 14:19:21,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:21,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2376 transitions. [2023-09-01 14:19:21,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.526315789473685) internal successors, (2376), 38 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:21,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:21,952 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:21,952 INFO L175 Difference]: Start difference. First operand has 412 places, 891 transitions, 18343 flow. Second operand 38 states and 2376 transitions. [2023-09-01 14:19:21,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1061 transitions, 22180 flow [2023-09-01 14:19:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1061 transitions, 21212 flow, removed 235 selfloop flow, removed 43 redundant places. [2023-09-01 14:19:22,606 INFO L231 Difference]: Finished difference. Result has 413 places, 941 transitions, 19037 flow [2023-09-01 14:19:22,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17393, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19037, PETRI_PLACES=413, PETRI_TRANSITIONS=941} [2023-09-01 14:19:22,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-09-01 14:19:22,607 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 941 transitions, 19037 flow [2023-09-01 14:19:22,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:22,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:22,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:22,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:22,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:22,808 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:22,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 543377190, now seen corresponding path program 32 times [2023-09-01 14:19:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168397463] [2023-09-01 14:19:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:23,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:23,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168397463] [2023-09-01 14:19:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168397463] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34010173] [2023-09-01 14:19:23,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:19:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:23,011 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 14:19:23,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:19:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:19:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:23,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34010173] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:23,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-09-01 14:19:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310886334] [2023-09-01 14:19:23,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 14:19:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 14:19:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-09-01 14:19:23,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:23,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 941 transitions, 19037 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:23,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:23,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:23,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:27,223 INFO L130 PetriNetUnfolder]: 3109/6832 cut-off events. [2023-09-01 14:19:27,223 INFO L131 PetriNetUnfolder]: For 113362/113362 co-relation queries the response was YES. [2023-09-01 14:19:27,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55455 conditions, 6832 events. 3109/6832 cut-off events. For 113362/113362 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59404 event pairs, 7 based on Foata normal form. 84/6912 useless extension candidates. Maximal degree in co-relation 55335. Up to 2818 conditions per place. [2023-09-01 14:19:27,282 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 931 selfloop transitions, 302 changer transitions 474/1707 dead transitions. [2023-09-01 14:19:27,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1707 transitions, 32940 flow [2023-09-01 14:19:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 14:19:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 14:19:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4078 transitions. [2023-09-01 14:19:27,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326790450928382 [2023-09-01 14:19:27,284 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4078 transitions. [2023-09-01 14:19:27,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4078 transitions. [2023-09-01 14:19:27,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:27,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4078 transitions. [2023-09-01 14:19:27,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 62.738461538461536) internal successors, (4078), 65 states have internal predecessors, (4078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:27,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:27,291 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:27,291 INFO L175 Difference]: Start difference. First operand has 413 places, 941 transitions, 19037 flow. Second operand 65 states and 4078 transitions. [2023-09-01 14:19:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1707 transitions, 32940 flow [2023-09-01 14:19:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1707 transitions, 32635 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-09-01 14:19:28,059 INFO L231 Difference]: Finished difference. Result has 477 places, 1043 transitions, 21861 flow [2023-09-01 14:19:28,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18882, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=21861, PETRI_PLACES=477, PETRI_TRANSITIONS=1043} [2023-09-01 14:19:28,060 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-09-01 14:19:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1043 transitions, 21861 flow [2023-09-01 14:19:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:28,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:28,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:28,260 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:28,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1301031468, now seen corresponding path program 33 times [2023-09-01 14:19:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:28,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028709147] [2023-09-01 14:19:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:28,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028709147] [2023-09-01 14:19:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028709147] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237243550] [2023-09-01 14:19:28,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:19:28,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:28,464 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 14:19:28,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 14:19:28,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:19:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:28,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237243550] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:28,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:28,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-09-01 14:19:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775994883] [2023-09-01 14:19:28,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:28,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:19:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:19:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:19:29,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:29,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1043 transitions, 21861 flow. Second operand has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:29,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:29,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:29,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:32,513 INFO L130 PetriNetUnfolder]: 3094/6954 cut-off events. [2023-09-01 14:19:32,513 INFO L131 PetriNetUnfolder]: For 162610/162610 co-relation queries the response was YES. [2023-09-01 14:19:32,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61972 conditions, 6954 events. 3094/6954 cut-off events. For 162610/162610 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 61590 event pairs, 3 based on Foata normal form. 137/7087 useless extension candidates. Maximal degree in co-relation 61831. Up to 2668 conditions per place. [2023-09-01 14:19:32,580 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 724 selfloop transitions, 492 changer transitions 144/1360 dead transitions. [2023-09-01 14:19:32,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1360 transitions, 30216 flow [2023-09-01 14:19:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:19:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:19:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2191 transitions. [2023-09-01 14:19:32,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317241379310345 [2023-09-01 14:19:32,582 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2191 transitions. [2023-09-01 14:19:32,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2191 transitions. [2023-09-01 14:19:32,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:32,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2191 transitions. [2023-09-01 14:19:32,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.6) internal successors, (2191), 35 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:32,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:32,586 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:32,586 INFO L175 Difference]: Start difference. First operand has 477 places, 1043 transitions, 21861 flow. Second operand 35 states and 2191 transitions. [2023-09-01 14:19:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1360 transitions, 30216 flow [2023-09-01 14:19:34,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1360 transitions, 26633 flow, removed 1403 selfloop flow, removed 48 redundant places. [2023-09-01 14:19:34,172 INFO L231 Difference]: Finished difference. Result has 445 places, 1163 transitions, 23234 flow [2023-09-01 14:19:34,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23234, PETRI_PLACES=445, PETRI_TRANSITIONS=1163} [2023-09-01 14:19:34,173 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 425 predicate places. [2023-09-01 14:19:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1163 transitions, 23234 flow [2023-09-01 14:19:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:34,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:34,174 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:34,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:34,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-09-01 14:19:34,374 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:34,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -34981713, now seen corresponding path program 34 times [2023-09-01 14:19:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:34,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557670368] [2023-09-01 14:19:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:34,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557670368] [2023-09-01 14:19:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557670368] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678963876] [2023-09-01 14:19:34,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:19:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:34,554 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 14:19:34,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:19:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:19:34,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:34,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:35,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678963876] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:35,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:35,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-09-01 14:19:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760260745] [2023-09-01 14:19:35,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:35,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:19:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:19:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:19:35,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:35,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1163 transitions, 23234 flow. Second operand has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:35,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:35,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:35,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:37,475 INFO L130 PetriNetUnfolder]: 2730/5071 cut-off events. [2023-09-01 14:19:37,475 INFO L131 PetriNetUnfolder]: For 64336/64336 co-relation queries the response was YES. [2023-09-01 14:19:37,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45809 conditions, 5071 events. 2730/5071 cut-off events. For 64336/64336 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34760 event pairs, 3 based on Foata normal form. 12/5079 useless extension candidates. Maximal degree in co-relation 45687. Up to 2030 conditions per place. [2023-09-01 14:19:37,526 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 662 selfloop transitions, 572 changer transitions 83/1317 dead transitions. [2023-09-01 14:19:37,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1317 transitions, 27831 flow [2023-09-01 14:19:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 14:19:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 14:19:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2434 transitions. [2023-09-01 14:19:37,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304155614500442 [2023-09-01 14:19:37,528 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2434 transitions. [2023-09-01 14:19:37,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2434 transitions. [2023-09-01 14:19:37,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:37,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2434 transitions. [2023-09-01 14:19:37,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.41025641025641) internal successors, (2434), 39 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:37,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:37,532 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:37,532 INFO L175 Difference]: Start difference. First operand has 445 places, 1163 transitions, 23234 flow. Second operand 39 states and 2434 transitions. [2023-09-01 14:19:37,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1317 transitions, 27831 flow [2023-09-01 14:19:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1317 transitions, 26548 flow, removed 505 selfloop flow, removed 26 redundant places. [2023-09-01 14:19:38,196 INFO L231 Difference]: Finished difference. Result has 451 places, 1176 transitions, 24146 flow [2023-09-01 14:19:38,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24146, PETRI_PLACES=451, PETRI_TRANSITIONS=1176} [2023-09-01 14:19:38,197 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-09-01 14:19:38,197 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1176 transitions, 24146 flow [2023-09-01 14:19:38,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:38,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:38,197 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:38,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-09-01 14:19:38,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 14:19:38,398 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:38,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash -801870177, now seen corresponding path program 35 times [2023-09-01 14:19:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541816876] [2023-09-01 14:19:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:38,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541816876] [2023-09-01 14:19:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541816876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:38,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178070338] [2023-09-01 14:19:38,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:19:38,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:38,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:38,600 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:38,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 14:19:38,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-09-01 14:19:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:19:38,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:38,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:39,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178070338] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:39,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:39,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-09-01 14:19:39,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530911987] [2023-09-01 14:19:39,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 14:19:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 14:19:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 14:19:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:39,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1176 transitions, 24146 flow. Second operand has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:39,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:39,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:39,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:41,651 INFO L130 PetriNetUnfolder]: 2657/4893 cut-off events. [2023-09-01 14:19:41,652 INFO L131 PetriNetUnfolder]: For 58703/58703 co-relation queries the response was YES. [2023-09-01 14:19:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44050 conditions, 4893 events. 2657/4893 cut-off events. For 58703/58703 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33134 event pairs, 3 based on Foata normal form. 9/4898 useless extension candidates. Maximal degree in co-relation 43931. Up to 2030 conditions per place. [2023-09-01 14:19:41,689 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 523 selfloop transitions, 36 changer transitions 717/1276 dead transitions. [2023-09-01 14:19:41,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 27396 flow [2023-09-01 14:19:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 14:19:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 14:19:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2546 transitions. [2023-09-01 14:19:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42825904121110175 [2023-09-01 14:19:41,691 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2546 transitions. [2023-09-01 14:19:41,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2546 transitions. [2023-09-01 14:19:41,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:41,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2546 transitions. [2023-09-01 14:19:41,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 62.09756097560975) internal successors, (2546), 41 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:41,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:41,695 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:41,695 INFO L175 Difference]: Start difference. First operand has 451 places, 1176 transitions, 24146 flow. Second operand 41 states and 2546 transitions. [2023-09-01 14:19:41,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 27396 flow [2023-09-01 14:19:42,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1276 transitions, 26889 flow, removed 177 selfloop flow, removed 29 redundant places. [2023-09-01 14:19:42,274 INFO L231 Difference]: Finished difference. Result has 456 places, 548 transitions, 8216 flow [2023-09-01 14:19:42,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8216, PETRI_PLACES=456, PETRI_TRANSITIONS=548} [2023-09-01 14:19:42,275 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-09-01 14:19:42,275 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 548 transitions, 8216 flow [2023-09-01 14:19:42,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:42,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:42,276 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:42,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:42,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 14:19:42,476 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:42,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1643464096, now seen corresponding path program 36 times [2023-09-01 14:19:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:42,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848559996] [2023-09-01 14:19:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:42,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848559996] [2023-09-01 14:19:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848559996] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070842920] [2023-09-01 14:19:42,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:19:42,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:42,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:42,713 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:42,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 14:19:42,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-09-01 14:19:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 14:19:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:43,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070842920] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:43,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:43,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-09-01 14:19:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101850545] [2023-09-01 14:19:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:43,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:19:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:19:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 14:19:43,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-09-01 14:19:43,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 548 transitions, 8216 flow. Second operand has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:43,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:43,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-09-01 14:19:43,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:45,252 INFO L130 PetriNetUnfolder]: 1693/3215 cut-off events. [2023-09-01 14:19:45,252 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-09-01 14:19:45,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21453 conditions, 3215 events. 1693/3215 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20402 event pairs, 0 based on Foata normal form. 17/3230 useless extension candidates. Maximal degree in co-relation 21339. Up to 985 conditions per place. [2023-09-01 14:19:45,274 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 0 selfloop transitions, 0 changer transitions 905/905 dead transitions. [2023-09-01 14:19:45,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 905 transitions, 14323 flow [2023-09-01 14:19:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 14:19:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 14:19:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3138 transitions. [2023-09-01 14:19:45,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243407707910751 [2023-09-01 14:19:45,276 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3138 transitions. [2023-09-01 14:19:45,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3138 transitions. [2023-09-01 14:19:45,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:45,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3138 transitions. [2023-09-01 14:19:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.529411764705884) internal successors, (3138), 51 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:45,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:45,281 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:45,281 INFO L175 Difference]: Start difference. First operand has 456 places, 548 transitions, 8216 flow. Second operand 51 states and 3138 transitions. [2023-09-01 14:19:45,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 905 transitions, 14323 flow [2023-09-01 14:19:45,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 905 transitions, 13429 flow, removed 258 selfloop flow, removed 42 redundant places. [2023-09-01 14:19:45,387 INFO L231 Difference]: Finished difference. Result has 276 places, 0 transitions, 0 flow [2023-09-01 14:19:45,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=276, PETRI_TRANSITIONS=0} [2023-09-01 14:19:45,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-09-01 14:19:45,388 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 0 transitions, 0 flow [2023-09-01 14:19:45,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:45,390 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 14:19:45,390 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 14:19:45,390 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 14:19:45,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:45,593 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-09-01 14:19:45,595 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 14:19:45,595 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 14:19:45,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 02:19:45 BasicIcfg [2023-09-01 14:19:45,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 14:19:45,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 14:19:45,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 14:19:45,597 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 14:19:45,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:18:04" (3/4) ... [2023-09-01 14:19:45,599 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 14:19:45,602 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 14:19:45,602 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 14:19:45,604 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 14:19:45,604 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 14:19:45,605 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 14:19:45,605 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 14:19:45,624 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 14:19:45,625 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 14:19:45,625 INFO L158 Benchmark]: Toolchain (without parser) took 101901.94ms. Allocated memory was 88.1MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 66.4MB in the beginning and 1.0GB in the end (delta: -948.9MB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2023-09-01 14:19:45,625 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 14:19:45,625 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.57ms. Allocated memory is still 88.1MB. Free memory was 66.4MB in the beginning and 55.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 14:19:45,625 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.72ms. Allocated memory is still 88.1MB. Free memory was 55.4MB in the beginning and 54.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 14:19:45,626 INFO L158 Benchmark]: Boogie Preprocessor took 35.79ms. Allocated memory is still 88.1MB. Free memory was 54.0MB in the beginning and 52.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 14:19:45,626 INFO L158 Benchmark]: RCFGBuilder took 269.63ms. Allocated memory is still 88.1MB. Free memory was 52.6MB in the beginning and 61.5MB in the end (delta: -8.9MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2023-09-01 14:19:45,626 INFO L158 Benchmark]: TraceAbstraction took 101345.70ms. Allocated memory was 88.1MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 60.6MB in the beginning and 1.0GB in the end (delta: -958.9MB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2023-09-01 14:19:45,626 INFO L158 Benchmark]: Witness Printer took 27.93ms. Allocated memory is still 3.0GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 14:19:45,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.57ms. Allocated memory is still 88.1MB. Free memory was 66.4MB in the beginning and 55.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.72ms. Allocated memory is still 88.1MB. Free memory was 55.4MB in the beginning and 54.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.79ms. Allocated memory is still 88.1MB. Free memory was 54.0MB in the beginning and 52.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 269.63ms. Allocated memory is still 88.1MB. Free memory was 52.6MB in the beginning and 61.5MB in the end (delta: -8.9MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. * TraceAbstraction took 101345.70ms. Allocated memory was 88.1MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 60.6MB in the beginning and 1.0GB in the end (delta: -958.9MB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * Witness Printer took 27.93ms. Allocated memory is still 3.0GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 449 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 448, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 448, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 101.3s, OverallIterations: 38, TraceHistogramMax: 8, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 71.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8844 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8511 mSDsluCounter, 3473 SdHoareTripleChecker+Invalid, 13.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3300 mSDsCounter, 1605 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44673 IncrementalHoareTripleChecker+Invalid, 46278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1605 mSolverCounterUnsat, 173 mSDtfsCounter, 44673 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2465 GetRequests, 623 SyntacticMatches, 50 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31147 ImplicationChecksByTransitivity, 26.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24146occurred in iteration=36, InterpolantAutomatonStates: 1275, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 17.7s InterpolantComputationTime, 1267 NumberOfCodeBlocks, 1267 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 1777 ConstructedInterpolants, 0 QuantifiedInterpolants, 19557 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 47/922 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 14:19:45,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE