./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:57:09,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:57:09,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:57:09,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:57:09,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:57:09,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:57:09,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:57:09,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:57:09,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:57:09,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:57:09,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:57:09,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:57:09,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:57:09,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:57:09,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:57:09,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:57:09,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:57:09,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:57:09,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:57:09,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:57:09,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:57:09,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:57:09,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:57:09,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:57:09,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:57:09,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:57:09,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:57:09,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:57:09,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:57:09,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:57:09,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:57:09,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:57:09,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:57:09,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:57:09,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:57:09,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:57:09,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:57:09,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:57:09,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:57:09,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:57:09,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:57:09,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:57:09,559 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:57:09,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:57:09,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:57:09,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:57:09,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:57:09,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:57:09,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:57:09,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:57:09,563 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:57:09,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:57:09,563 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:57:09,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:57:09,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:57:09,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:57:09,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:57:09,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:57:09,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:57:09,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:57:09,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:57:09,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:57:09,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:57:09,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:57:09,567 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:57:09,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:57:09,567 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:57:09,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:57:09,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:57:09,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:57:09,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:57:09,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:57:09,843 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:57:09,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 20:57:10,783 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:57:10,954 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:57:10,954 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 20:57:10,959 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b6caece/c02eb3c6ead84fa1ab82375cef2755b1/FLAG55460d435 [2023-08-30 20:57:10,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85b6caece/c02eb3c6ead84fa1ab82375cef2755b1 [2023-08-30 20:57:10,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:57:10,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:57:10,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:57:10,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:57:10,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:57:10,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:57:10" (1/1) ... [2023-08-30 20:57:10,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0f0d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:10, skipping insertion in model container [2023-08-30 20:57:10,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:57:10" (1/1) ... [2023-08-30 20:57:10,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:57:11,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:57:11,125 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-30 20:57:11,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:57:11,136 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:57:11,153 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-30 20:57:11,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:57:11,163 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:57:11,163 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:57:11,168 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:57:11,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11 WrapperNode [2023-08-30 20:57:11,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:57:11,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:57:11,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:57:11,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:57:11,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,192 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-08-30 20:57:11,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:57:11,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:57:11,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:57:11,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:57:11,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:57:11,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:57:11,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:57:11,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:57:11,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (1/1) ... [2023-08-30 20:57:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:57:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:11,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:57:11,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:57:11,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:57:11,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:57:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:57:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:57:11,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:57:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:57:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:57:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:57:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:57:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:57:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:57:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:57:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:57:11,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:57:11,289 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:57:11,350 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:57:11,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:57:11,534 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:57:11,571 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:57:11,571 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 20:57:11,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:57:11 BoogieIcfgContainer [2023-08-30 20:57:11,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:57:11,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:57:11,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:57:11,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:57:11,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:57:10" (1/3) ... [2023-08-30 20:57:11,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2209e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:57:11, skipping insertion in model container [2023-08-30 20:57:11,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:57:11" (2/3) ... [2023-08-30 20:57:11,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2209e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:57:11, skipping insertion in model container [2023-08-30 20:57:11,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:57:11" (3/3) ... [2023-08-30 20:57:11,590 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 20:57:11,594 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:57:11,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:57:11,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:57:11,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:57:11,664 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:57:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-08-30 20:57:11,750 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-08-30 20:57:11,750 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:57:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 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. 0/70 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-30 20:57:11,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-08-30 20:57:11,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-08-30 20:57:11,762 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:57:11,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-08-30 20:57:11,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-08-30 20:57:11,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-08-30 20:57:11,800 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-08-30 20:57:11,800 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:57:11,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-30 20:57:11,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-30 20:57:13,493 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-08-30 20:57:13,493 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-30 20:57:13,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:57:13,506 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;@41ce7dca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:57:13,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:57:13,509 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 20:57:13,509 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:57:13,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:13,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:13,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:13,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-08-30 20:57:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:13,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107076201] [2023-08-30 20:57:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:13,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:13,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107076201] [2023-08-30 20:57:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107076201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:13,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:13,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:57:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366727324] [2023-08-30 20:57:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:13,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:57:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:57:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:57:13,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-08-30 20:57:13,845 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) [2023-08-30 20:57:13,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:13,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-08-30 20:57:13,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:13,890 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-30 20:57:13,890 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 20:57:13,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 240 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-30 20:57:13,892 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 20:57:13,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-30 20:57:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:57:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:57:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-30 20:57:13,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48063380281690143 [2023-08-30 20:57:13,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-30 20:57:13,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-30 20:57:13,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:13,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-30 20:57:13,924 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) [2023-08-30 20:57:13,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,927 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:13,928 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-08-30 20:57:13,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-30 20:57:13,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:57:13,931 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-30 20:57:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, 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} [2023-08-30 20:57:13,934 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-30 20:57:13,934 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-30 20:57:13,935 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) [2023-08-30 20:57:13,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:13,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:57:13,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:13,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-08-30 20:57:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637285589] [2023-08-30 20:57:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637285589] [2023-08-30 20:57:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637285589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:57:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:57:14,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456133670] [2023-08-30 20:57:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:14,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:57:14,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:57:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:57:14,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-30 20:57:14,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:14,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-30 20:57:14,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:14,102 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-08-30 20:57:14,103 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-08-30 20:57:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 22/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 16 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 97. Up to 74 conditions per place. [2023-08-30 20:57:14,104 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-08-30 20:57:14,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-08-30 20:57:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:57:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:57:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2023-08-30 20:57:14,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894366197183099 [2023-08-30 20:57:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2023-08-30 20:57:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2023-08-30 20:57:14,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:14,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2023-08-30 20:57:14,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,109 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,109 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 278 transitions. [2023-08-30 20:57:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-08-30 20:57:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 20:57:14,110 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-08-30 20:57:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-08-30 20:57:14,111 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 20:57:14,111 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-08-30 20:57:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:14,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:57:14,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:14,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-08-30 20:57:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:14,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769529429] [2023-08-30 20:57:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:14,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769529429] [2023-08-30 20:57:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769529429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:14,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946102097] [2023-08-30 20:57:14,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:57:14,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:14,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:14,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:57:14,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 20:57:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:57:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:14,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:57:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946102097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:57:14,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:57:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-30 20:57:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801214566] [2023-08-30 20:57:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:14,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:57:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:57:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:57:14,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-30 20:57:14,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:14,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-30 20:57:14,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:14,398 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-08-30 20:57:14,399 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-08-30 20:57:14,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 24 based on Foata normal form. 16/99 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-08-30 20:57:14,400 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-30 20:57:14,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-08-30 20:57:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:57:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:57:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-30 20:57:14,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735915492957746 [2023-08-30 20:57:14,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-30 20:57:14,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-30 20:57:14,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:14,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-30 20:57:14,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-08-30 20:57:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,417 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,417 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 269 transitions. [2023-08-30 20:57:14,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-08-30 20:57:14,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 20:57:14,418 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-30 20:57:14,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-30 20:57:14,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-30 20:57:14,419 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-30 20:57:14,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:14,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:14,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:14,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:14,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:14,624 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:14,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-08-30 20:57:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:14,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703568780] [2023-08-30 20:57:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:14,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:14,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:14,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703568780] [2023-08-30 20:57:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703568780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:14,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625236850] [2023-08-30 20:57:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:14,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:14,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:14,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:57:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:57:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:14,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:15,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625236850] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:15,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:57:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-08-30 20:57:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136126829] [2023-08-30 20:57:15,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:57:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:57:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:57:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:57:15,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-08-30 20:57:15,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:15,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-08-30 20:57:15,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:15,183 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-08-30 20:57:15,184 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-08-30 20:57:15,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 50/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 560 event pairs, 15 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-08-30 20:57:15,185 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-30 20:57:15,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-08-30 20:57:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:57:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:57:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2023-08-30 20:57:15,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 20:57:15,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2023-08-30 20:57:15,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2023-08-30 20:57:15,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:15,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2023-08-30 20:57:15,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,189 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 284 transitions. [2023-08-30 20:57:15,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-08-30 20:57:15,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 20:57:15,190 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-08-30 20:57:15,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-30 20:57:15,191 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 20:57:15,191 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-08-30 20:57:15,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:15,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:15,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 20:57:15,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:15,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-08-30 20:57:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:15,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086907510] [2023-08-30 20:57:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:15,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:15,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086907510] [2023-08-30 20:57:15,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086907510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418615456] [2023-08-30 20:57:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:57:15,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:15,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:15,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:57:15,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:57:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:57:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:15,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418615456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:15,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-08-30 20:57:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445215426] [2023-08-30 20:57:15,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:57:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:57:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:57:15,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:57:15,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:15,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:15,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:57:15,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:16,253 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-08-30 20:57:16,253 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-08-30 20:57:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 307 events. 175/307 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 10 based on Foata normal form. 22/329 useless extension candidates. Maximal degree in co-relation 316. Up to 131 conditions per place. [2023-08-30 20:57:16,255 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-08-30 20:57:16,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-08-30 20:57:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:57:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:57:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 939 transitions. [2023-08-30 20:57:16,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44084507042253523 [2023-08-30 20:57:16,258 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 939 transitions. [2023-08-30 20:57:16,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 939 transitions. [2023-08-30 20:57:16,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:16,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 939 transitions. [2023-08-30 20:57:16,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 62.6) internal successors, (939), 15 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:16,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:16,263 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:16,263 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 939 transitions. [2023-08-30 20:57:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-08-30 20:57:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:57:16,266 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-08-30 20:57:16,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=364, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-30 20:57:16,266 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-30 20:57:16,266 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-08-30 20:57:16,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.46153846153846) internal successors, (786), 13 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:16,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:16,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:16,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:16,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:16,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-08-30 20:57:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:16,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725161394] [2023-08-30 20:57:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725161394] [2023-08-30 20:57:16,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725161394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634656223] [2023-08-30 20:57:16,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:57:16,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:16,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:16,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:16,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:57:16,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:57:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:57:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:16,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634656223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:16,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:16,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 20:57:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351315075] [2023-08-30 20:57:16,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:16,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:57:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:57:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:57:17,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:57:17,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:17,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:57:17,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:17,504 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-08-30 20:57:17,504 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-08-30 20:57:17,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 565 events. 313/565 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2400 event pairs, 13 based on Foata normal form. 22/587 useless extension candidates. Maximal degree in co-relation 2022. Up to 183 conditions per place. [2023-08-30 20:57:17,508 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-08-30 20:57:17,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-08-30 20:57:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 20:57:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 20:57:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1028 transitions. [2023-08-30 20:57:17,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-08-30 20:57:17,512 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1028 transitions. [2023-08-30 20:57:17,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1028 transitions. [2023-08-30 20:57:17,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:17,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1028 transitions. [2023-08-30 20:57:17,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.25) internal successors, (1028), 16 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,517 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,517 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 1028 transitions. [2023-08-30 20:57:17,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-08-30 20:57:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-30 20:57:17,526 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-08-30 20:57:17,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=741, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-08-30 20:57:17,528 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-30 20:57:17,528 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-08-30 20:57:17,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:17,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:17,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:17,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:17,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:17,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:17,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-08-30 20:57:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94804023] [2023-08-30 20:57:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:17,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94804023] [2023-08-30 20:57:17,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94804023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346043536] [2023-08-30 20:57:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:57:17,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:17,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:17,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:57:17,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:57:17,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:57:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:18,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346043536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:18,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:18,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:57:18,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622709539] [2023-08-30 20:57:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:18,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:57:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:57:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:57:18,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:57:18,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 741 flow. Second operand has 16 states, 16 states have (on average 60.125) internal successors, (962), 16 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:18,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:57:18,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:18,818 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-08-30 20:57:18,819 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-08-30 20:57:18,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 680 events. 372/680 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3114 event pairs, 24 based on Foata normal form. 38/718 useless extension candidates. Maximal degree in co-relation 3026. Up to 239 conditions per place. [2023-08-30 20:57:18,823 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-08-30 20:57:18,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-08-30 20:57:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:57:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:57:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1226 transitions. [2023-08-30 20:57:18,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45441067457375833 [2023-08-30 20:57:18,828 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1226 transitions. [2023-08-30 20:57:18,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1226 transitions. [2023-08-30 20:57:18,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:18,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1226 transitions. [2023-08-30 20:57:18,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,834 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,834 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1226 transitions. [2023-08-30 20:57:18,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-08-30 20:57:18,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-08-30 20:57:18,846 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-08-30 20:57:18,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1127, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2023-08-30 20:57:18,847 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-08-30 20:57:18,847 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-08-30 20:57:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.125) internal successors, (962), 16 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:18,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:18,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:18,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:19,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:19,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:19,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-08-30 20:57:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233725915] [2023-08-30 20:57:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233725915] [2023-08-30 20:57:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233725915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773661550] [2023-08-30 20:57:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:57:19,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:19,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:19,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:19,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:57:19,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:57:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:57:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:19,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773661550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:19,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:57:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329513337] [2023-08-30 20:57:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:57:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:57:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:57:19,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-30 20:57:19,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 1127 flow. Second operand has 16 states, 16 states have (on average 62.0625) internal successors, (993), 16 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:19,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:19,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-30 20:57:19,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:20,805 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-08-30 20:57:20,806 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-08-30 20:57:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6850 conditions, 1037 events. 537/1037 cut-off events. For 18920/18920 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5562 event pairs, 29 based on Foata normal form. 24/1061 useless extension candidates. Maximal degree in co-relation 5560. Up to 355 conditions per place. [2023-08-30 20:57:20,813 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-08-30 20:57:20,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-08-30 20:57:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 20:57:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 20:57:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1997 transitions. [2023-08-30 20:57:20,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687793427230047 [2023-08-30 20:57:20,817 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1997 transitions. [2023-08-30 20:57:20,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1997 transitions. [2023-08-30 20:57:20,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:20,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1997 transitions. [2023-08-30 20:57:20,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.56666666666666) internal successors, (1997), 30 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:20,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:20,826 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:20,826 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1997 transitions. [2023-08-30 20:57:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-08-30 20:57:20,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-08-30 20:57:20,854 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-08-30 20:57:20,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1769, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-08-30 20:57:20,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-08-30 20:57:20,855 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-08-30 20:57:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.0625) internal successors, (993), 16 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:20,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:20,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:20,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:21,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:21,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-08-30 20:57:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:21,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86921375] [2023-08-30 20:57:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86921375] [2023-08-30 20:57:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86921375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925389927] [2023-08-30 20:57:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:57:21,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:21,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:21,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:57:21,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:57:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:57:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:21,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925389927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:21,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:21,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-30 20:57:21,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967113788] [2023-08-30 20:57:21,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:21,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:57:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:57:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:57:21,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-30 20:57:21,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1769 flow. Second operand has 14 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:21,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:21,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-30 20:57:21,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:22,506 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-08-30 20:57:22,506 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-08-30 20:57:22,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1220 events. 626/1220 cut-off events. For 29888/29888 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6893 event pairs, 103 based on Foata normal form. 40/1260 useless extension candidates. Maximal degree in co-relation 8284. Up to 443 conditions per place. [2023-08-30 20:57:22,517 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-08-30 20:57:22,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-08-30 20:57:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:57:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:57:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1119 transitions. [2023-08-30 20:57:22,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635459817729909 [2023-08-30 20:57:22,519 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1119 transitions. [2023-08-30 20:57:22,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1119 transitions. [2023-08-30 20:57:22,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:22,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1119 transitions. [2023-08-30 20:57:22,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:22,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:22,525 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:22,525 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1119 transitions. [2023-08-30 20:57:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-08-30 20:57:22,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-08-30 20:57:22,564 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-08-30 20:57:22,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2784, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2023-08-30 20:57:22,565 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-08-30 20:57:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-08-30 20:57:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.285714285714285) internal successors, (872), 14 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:22,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:22,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:22,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:22,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:22,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:22,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-08-30 20:57:22,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:22,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080806788] [2023-08-30 20:57:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080806788] [2023-08-30 20:57:22,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080806788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778230580] [2023-08-30 20:57:22,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:57:22,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:22,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:22,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:57:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:57:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:22,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778230580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:23,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:23,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:57:23,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619323902] [2023-08-30 20:57:23,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:57:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:57:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:57:23,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:57:23,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 2784 flow. Second operand has 15 states, 15 states have (on average 60.06666666666667) internal successors, (901), 15 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:23,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:23,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:57:23,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:23,894 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-08-30 20:57:23,895 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-08-30 20:57:23,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12757 conditions, 1574 events. 810/1574 cut-off events. For 42907/42907 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9502 event pairs, 98 based on Foata normal form. 52/1626 useless extension candidates. Maximal degree in co-relation 11619. Up to 1051 conditions per place. [2023-08-30 20:57:23,908 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-08-30 20:57:23,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-08-30 20:57:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 20:57:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 20:57:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1481 transitions. [2023-08-30 20:57:23,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345988977342316 [2023-08-30 20:57:23,912 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1481 transitions. [2023-08-30 20:57:23,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1481 transitions. [2023-08-30 20:57:23,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:23,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1481 transitions. [2023-08-30 20:57:23,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.3913043478261) internal successors, (1481), 23 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:23,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:23,920 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:23,920 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1481 transitions. [2023-08-30 20:57:23,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-08-30 20:57:24,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-08-30 20:57:24,011 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-08-30 20:57:24,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4217, PETRI_PLACES=165, PETRI_TRANSITIONS=256} [2023-08-30 20:57:24,011 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-08-30 20:57:24,012 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-08-30 20:57:24,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 60.06666666666667) internal successors, (901), 15 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:24,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:24,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:24,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 20:57:24,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 20:57:24,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:24,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-08-30 20:57:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:24,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254195329] [2023-08-30 20:57:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:24,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:24,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254195329] [2023-08-30 20:57:24,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254195329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690863969] [2023-08-30 20:57:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:57:24,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:24,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:24,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:24,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:57:24,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:57:24,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:57:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690863969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:24,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:57:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911906862] [2023-08-30 20:57:24,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:57:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:57:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:57:24,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-08-30 20:57:24,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 256 transitions, 4217 flow. Second operand has 15 states, 15 states have (on average 61.733333333333334) internal successors, (926), 15 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:24,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:24,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-08-30 20:57:24,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:26,246 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-08-30 20:57:26,247 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-08-30 20:57:26,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17101 conditions, 1958 events. 998/1958 cut-off events. For 73427/73427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12509 event pairs, 168 based on Foata normal form. 24/1982 useless extension candidates. Maximal degree in co-relation 14924. Up to 886 conditions per place. [2023-08-30 20:57:26,270 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-08-30 20:57:26,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-08-30 20:57:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:57:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:57:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1459 transitions. [2023-08-30 20:57:26,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46702944942381563 [2023-08-30 20:57:26,273 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1459 transitions. [2023-08-30 20:57:26,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1459 transitions. [2023-08-30 20:57:26,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:26,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1459 transitions. [2023-08-30 20:57:26,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.31818181818181) internal successors, (1459), 22 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:26,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:26,279 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:26,279 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1459 transitions. [2023-08-30 20:57:26,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-08-30 20:57:26,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-08-30 20:57:26,455 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-08-30 20:57:26,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5255, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2023-08-30 20:57:26,456 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-08-30 20:57:26,456 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-08-30 20:57:26,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.733333333333334) internal successors, (926), 15 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:26,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:26,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:26,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 20:57:26,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:26,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:26,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:26,662 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-08-30 20:57:26,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:26,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879679391] [2023-08-30 20:57:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:26,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:26,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879679391] [2023-08-30 20:57:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879679391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90794954] [2023-08-30 20:57:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:57:26,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:26,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:26,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:57:26,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:57:26,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 20:57:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90794954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:27,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:27,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-08-30 20:57:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924467199] [2023-08-30 20:57:27,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:27,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:57:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:57:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:57:27,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:57:27,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 5255 flow. Second operand has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:27,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:27,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:57:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:28,105 INFO L130 PetriNetUnfolder]: 1299/2549 cut-off events. [2023-08-30 20:57:28,106 INFO L131 PetriNetUnfolder]: For 103937/103953 co-relation queries the response was YES. [2023-08-30 20:57:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23668 conditions, 2549 events. 1299/2549 cut-off events. For 103937/103953 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17434 event pairs, 132 based on Foata normal form. 29/2571 useless extension candidates. Maximal degree in co-relation 22640. Up to 1027 conditions per place. [2023-08-30 20:57:28,130 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 241 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-08-30 20:57:28,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9139 flow [2023-08-30 20:57:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:57:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:57:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 719 transitions. [2023-08-30 20:57:28,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46030729833546735 [2023-08-30 20:57:28,132 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 719 transitions. [2023-08-30 20:57:28,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 719 transitions. [2023-08-30 20:57:28,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:28,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 719 transitions. [2023-08-30 20:57:28,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.36363636363636) internal successors, (719), 11 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:28,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:28,135 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:28,135 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 719 transitions. [2023-08-30 20:57:28,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9139 flow [2023-08-30 20:57:28,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8886 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-08-30 20:57:28,374 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-08-30 20:57:28,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6244, PETRI_PLACES=203, PETRI_TRANSITIONS=330} [2023-08-30 20:57:28,376 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-08-30 20:57:28,376 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-08-30 20:57:28,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:28,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:28,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:28,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:57:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:57:28,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:28,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-08-30 20:57:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316218010] [2023-08-30 20:57:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:28,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316218010] [2023-08-30 20:57:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316218010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459887915] [2023-08-30 20:57:28,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:57:28,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:28,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:28,826 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:28,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:57:28,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:57:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:57:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:57:29,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459887915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:29,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:29,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-08-30 20:57:29,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424832445] [2023-08-30 20:57:29,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:29,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:57:29,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:57:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:57:29,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:57:29,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 330 transitions, 6244 flow. Second operand has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:29,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:29,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:57:29,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:57:30,503 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-08-30 20:57:30,503 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-08-30 20:57:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 2353 events. 1163/2353 cut-off events. For 125038/125038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16153 event pairs, 98 based on Foata normal form. 62/2415 useless extension candidates. Maximal degree in co-relation 21468. Up to 972 conditions per place. [2023-08-30 20:57:30,530 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-08-30 20:57:30,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-08-30 20:57:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:57:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:57:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2005 transitions. [2023-08-30 20:57:30,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278702518139138 [2023-08-30 20:57:30,534 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2005 transitions. [2023-08-30 20:57:30,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2005 transitions. [2023-08-30 20:57:30,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:57:30,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2005 transitions. [2023-08-30 20:57:30,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.75757575757576) internal successors, (2005), 33 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:30,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:30,551 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:30,551 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 2005 transitions. [2023-08-30 20:57:30,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-08-30 20:57:30,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-08-30 20:57:30,829 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-08-30 20:57:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7078, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2023-08-30 20:57:30,830 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-08-30 20:57:30,830 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-08-30 20:57:30,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:30,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:57:30,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:57:30,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 20:57:31,031 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 [2023-08-30 20:57:31,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:57:31,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:57:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-08-30 20:57:31,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:57:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599146328] [2023-08-30 20:57:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:57:31,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:57:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:57:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:31,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:57:31,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599146328] [2023-08-30 20:57:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599146328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:57:31,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29864524] [2023-08-30 20:57:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:57:31,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:57:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:57:31,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:57:31,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:57:31,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:57:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:57:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 20:57:31,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:57:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:31,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:57:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:57:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29864524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:57:58,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:57:58,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-08-30 20:57:58,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261749110] [2023-08-30 20:57:58,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:57:58,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:57:58,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:57:58,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:57:58,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:57:59,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:57:59,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 7078 flow. Second operand has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:57:59,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:57:59,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:57:59,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:58:05,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:08,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:16,523 WARN L222 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 85 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:58:21,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:28,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:30,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:58:31,716 INFO L130 PetriNetUnfolder]: 1454/2913 cut-off events. [2023-08-30 20:58:31,716 INFO L131 PetriNetUnfolder]: For 156447/156447 co-relation queries the response was YES. [2023-08-30 20:58:31,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28848 conditions, 2913 events. 1454/2913 cut-off events. For 156447/156447 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20641 event pairs, 36 based on Foata normal form. 54/2967 useless extension candidates. Maximal degree in co-relation 28260. Up to 759 conditions per place. [2023-08-30 20:58:31,743 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 226 selfloop transitions, 354 changer transitions 5/585 dead transitions. [2023-08-30 20:58:31,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 585 transitions, 12727 flow [2023-08-30 20:58:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 20:58:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 20:58:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1717 transitions. [2023-08-30 20:58:31,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431841046277666 [2023-08-30 20:58:31,746 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1717 transitions. [2023-08-30 20:58:31,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1717 transitions. [2023-08-30 20:58:31,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:58:31,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1717 transitions. [2023-08-30 20:58:31,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 61.32142857142857) internal successors, (1717), 28 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:58:31,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:58:31,752 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:58:31,752 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 28 states and 1717 transitions. [2023-08-30 20:58:31,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 585 transitions, 12727 flow [2023-08-30 20:58:32,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 585 transitions, 11933 flow, removed 260 selfloop flow, removed 14 redundant places. [2023-08-30 20:58:32,099 INFO L231 Difference]: Finished difference. Result has 261 places, 499 transitions, 11436 flow [2023-08-30 20:58:32,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11436, PETRI_PLACES=261, PETRI_TRANSITIONS=499} [2023-08-30 20:58:32,100 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 241 predicate places. [2023-08-30 20:58:32,100 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 499 transitions, 11436 flow [2023-08-30 20:58:32,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:58:32,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:58:32,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:58:32,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:58:32,305 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 [2023-08-30 20:58:32,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:58:32,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:58:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-08-30 20:58:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:58:32,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100383465] [2023-08-30 20:58:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:58:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:58:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:58:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:58:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:58:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100383465] [2023-08-30 20:58:32,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100383465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:58:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861018890] [2023-08-30 20:58:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:58:32,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:58:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:58:32,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:58:32,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:58:32,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:58:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:58:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:58:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:58:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:58:32,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:58:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:58:57,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861018890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:58:57,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:58:57,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-30 20:58:57,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147146361] [2023-08-30 20:58:57,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:58:57,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:58:57,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:58:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:58:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:58:57,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 20:58:57,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 499 transitions, 11436 flow. Second operand has 18 states, 18 states have (on average 59.94444444444444) internal successors, (1079), 18 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:58:57,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:58:57,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 20:58:57,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:03,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:06,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:08,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:10,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:13,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:15,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:17,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:59:22,174 INFO L130 PetriNetUnfolder]: 1674/3437 cut-off events. [2023-08-30 20:59:22,175 INFO L131 PetriNetUnfolder]: For 177080/177080 co-relation queries the response was YES. [2023-08-30 20:59:22,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36382 conditions, 3437 events. 1674/3437 cut-off events. For 177080/177080 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25553 event pairs, 48 based on Foata normal form. 54/3491 useless extension candidates. Maximal degree in co-relation 35466. Up to 927 conditions per place. [2023-08-30 20:59:22,209 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 256 selfloop transitions, 421 changer transitions 14/691 dead transitions. [2023-08-30 20:59:22,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 691 transitions, 17080 flow [2023-08-30 20:59:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 20:59:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 20:59:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1469 transitions. [2023-08-30 20:59:22,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497856705450092 [2023-08-30 20:59:22,212 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1469 transitions. [2023-08-30 20:59:22,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1469 transitions. [2023-08-30 20:59:22,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:22,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1469 transitions. [2023-08-30 20:59:22,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.869565217391305) internal successors, (1469), 23 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:22,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:22,216 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:22,216 INFO L175 Difference]: Start difference. First operand has 261 places, 499 transitions, 11436 flow. Second operand 23 states and 1469 transitions. [2023-08-30 20:59:22,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 691 transitions, 17080 flow [2023-08-30 20:59:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 691 transitions, 15213 flow, removed 874 selfloop flow, removed 20 redundant places. [2023-08-30 20:59:23,013 INFO L231 Difference]: Finished difference. Result has 272 places, 596 transitions, 14185 flow [2023-08-30 20:59:23,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=10018, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14185, PETRI_PLACES=272, PETRI_TRANSITIONS=596} [2023-08-30 20:59:23,014 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2023-08-30 20:59:23,014 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 596 transitions, 14185 flow [2023-08-30 20:59:23,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 59.94444444444444) internal successors, (1079), 18 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:23,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:23,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:23,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:23,219 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 [2023-08-30 20:59:23,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:23,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-08-30 20:59:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:23,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900731781] [2023-08-30 20:59:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:23,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900731781] [2023-08-30 20:59:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900731781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469190878] [2023-08-30 20:59:23,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:59:23,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:23,487 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:23,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:59:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 20:59:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469190878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:23,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:23,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 20:59:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562291133] [2023-08-30 20:59:23,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:23,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:59:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:59:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:59:24,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:59:24,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 596 transitions, 14185 flow. Second operand has 24 states, 24 states have (on average 58.083333333333336) internal successors, (1394), 24 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:24,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:24,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:59:24,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:26,806 INFO L130 PetriNetUnfolder]: 3004/6141 cut-off events. [2023-08-30 20:59:26,816 INFO L131 PetriNetUnfolder]: For 241847/241847 co-relation queries the response was YES. [2023-08-30 20:59:26,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63905 conditions, 6141 events. 3004/6141 cut-off events. For 241847/241847 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50758 event pairs, 336 based on Foata normal form. 71/6212 useless extension candidates. Maximal degree in co-relation 62232. Up to 2339 conditions per place. [2023-08-30 20:59:26,879 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 891 selfloop transitions, 356 changer transitions 26/1273 dead transitions. [2023-08-30 20:59:26,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1273 transitions, 32077 flow [2023-08-30 20:59:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 20:59:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 20:59:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2119 transitions. [2023-08-30 20:59:26,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388980944490472 [2023-08-30 20:59:26,881 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2119 transitions. [2023-08-30 20:59:26,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2119 transitions. [2023-08-30 20:59:26,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:26,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2119 transitions. [2023-08-30 20:59:26,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 62.3235294117647) internal successors, (2119), 34 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,888 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:26,888 INFO L175 Difference]: Start difference. First operand has 272 places, 596 transitions, 14185 flow. Second operand 34 states and 2119 transitions. [2023-08-30 20:59:26,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1273 transitions, 32077 flow [2023-08-30 20:59:28,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1273 transitions, 30136 flow, removed 765 selfloop flow, removed 11 redundant places. [2023-08-30 20:59:28,551 INFO L231 Difference]: Finished difference. Result has 309 places, 812 transitions, 19658 flow [2023-08-30 20:59:28,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=13186, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19658, PETRI_PLACES=309, PETRI_TRANSITIONS=812} [2023-08-30 20:59:28,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 289 predicate places. [2023-08-30 20:59:28,552 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 812 transitions, 19658 flow [2023-08-30 20:59:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 58.083333333333336) internal successors, (1394), 24 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:28,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:28,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:28,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:28,756 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 [2023-08-30 20:59:28,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:28,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 14 times [2023-08-30 20:59:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862052259] [2023-08-30 20:59:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:28,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862052259] [2023-08-30 20:59:28,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862052259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:28,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228957946] [2023-08-30 20:59:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:59:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:28,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:28,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:59:29,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:59:29,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:59:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:29,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228957946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:29,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:29,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 20:59:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888349437] [2023-08-30 20:59:29,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:29,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:59:29,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:59:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:59:29,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:59:29,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 812 transitions, 19658 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:29,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:29,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:59:29,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:34,158 INFO L130 PetriNetUnfolder]: 3508/7273 cut-off events. [2023-08-30 20:59:34,158 INFO L131 PetriNetUnfolder]: For 351345/351345 co-relation queries the response was YES. [2023-08-30 20:59:34,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80748 conditions, 7273 events. 3508/7273 cut-off events. For 351345/351345 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 62753 event pairs, 305 based on Foata normal form. 104/7377 useless extension candidates. Maximal degree in co-relation 79414. Up to 1661 conditions per place. [2023-08-30 20:59:34,239 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 615 selfloop transitions, 832 changer transitions 41/1488 dead transitions. [2023-08-30 20:59:34,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1488 transitions, 39060 flow [2023-08-30 20:59:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 20:59:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 20:59:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3196 transitions. [2023-08-30 20:59:34,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43282773564463706 [2023-08-30 20:59:34,243 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3196 transitions. [2023-08-30 20:59:34,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3196 transitions. [2023-08-30 20:59:34,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:34,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3196 transitions. [2023-08-30 20:59:34,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 61.46153846153846) internal successors, (3196), 52 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:34,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:34,252 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:34,252 INFO L175 Difference]: Start difference. First operand has 309 places, 812 transitions, 19658 flow. Second operand 52 states and 3196 transitions. [2023-08-30 20:59:34,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1488 transitions, 39060 flow [2023-08-30 20:59:36,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1488 transitions, 37832 flow, removed 574 selfloop flow, removed 7 redundant places. [2023-08-30 20:59:36,944 INFO L231 Difference]: Finished difference. Result has 369 places, 1134 transitions, 31208 flow [2023-08-30 20:59:36,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=18079, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=31208, PETRI_PLACES=369, PETRI_TRANSITIONS=1134} [2023-08-30 20:59:36,945 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-30 20:59:36,945 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1134 transitions, 31208 flow [2023-08-30 20:59:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:36,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:36,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:36,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:59:37,150 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 [2023-08-30 20:59:37,150 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:37,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:37,151 INFO L85 PathProgramCache]: Analyzing trace with hash 607446245, now seen corresponding path program 15 times [2023-08-30 20:59:37,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:37,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913537924] [2023-08-30 20:59:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:37,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:37,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913537924] [2023-08-30 20:59:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913537924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033324587] [2023-08-30 20:59:37,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:59:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:37,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:37,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:59:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:59:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 20:59:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:37,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:37,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033324587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:37,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:37,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 20:59:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255537813] [2023-08-30 20:59:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:59:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:59:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:59:38,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:59:38,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1134 transitions, 31208 flow. Second operand has 25 states, 25 states have (on average 57.8) internal successors, (1445), 25 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:38,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:38,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:59:38,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:42,898 INFO L130 PetriNetUnfolder]: 3617/7447 cut-off events. [2023-08-30 20:59:42,898 INFO L131 PetriNetUnfolder]: For 423245/423245 co-relation queries the response was YES. [2023-08-30 20:59:42,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87610 conditions, 7447 events. 3617/7447 cut-off events. For 423245/423245 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64138 event pairs, 535 based on Foata normal form. 67/7514 useless extension candidates. Maximal degree in co-relation 86335. Up to 3190 conditions per place. [2023-08-30 20:59:43,000 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1091 selfloop transitions, 379 changer transitions 20/1490 dead transitions. [2023-08-30 20:59:43,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1490 transitions, 41174 flow [2023-08-30 20:59:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 20:59:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 20:59:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2901 transitions. [2023-08-30 20:59:43,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43467186095295174 [2023-08-30 20:59:43,003 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2901 transitions. [2023-08-30 20:59:43,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2901 transitions. [2023-08-30 20:59:43,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:59:43,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2901 transitions. [2023-08-30 20:59:43,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 61.723404255319146) internal successors, (2901), 47 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:43,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:43,012 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:43,012 INFO L175 Difference]: Start difference. First operand has 369 places, 1134 transitions, 31208 flow. Second operand 47 states and 2901 transitions. [2023-08-30 20:59:43,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1490 transitions, 41174 flow [2023-08-30 20:59:46,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1490 transitions, 37632 flow, removed 1740 selfloop flow, removed 13 redundant places. [2023-08-30 20:59:46,773 INFO L231 Difference]: Finished difference. Result has 406 places, 1184 transitions, 30723 flow [2023-08-30 20:59:46,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=28392, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=30723, PETRI_PLACES=406, PETRI_TRANSITIONS=1184} [2023-08-30 20:59:46,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 386 predicate places. [2023-08-30 20:59:46,774 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1184 transitions, 30723 flow [2023-08-30 20:59:46,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.8) internal successors, (1445), 25 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:46,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:59:46,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:59:46,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 20:59:46,979 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 [2023-08-30 20:59:46,979 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:59:46,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:59:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1479526723, now seen corresponding path program 16 times [2023-08-30 20:59:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:59:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396330990] [2023-08-30 20:59:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:59:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:59:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:59:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:47,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:59:47,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396330990] [2023-08-30 20:59:47,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396330990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:59:47,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080028931] [2023-08-30 20:59:47,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:59:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:59:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:59:47,419 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:59:47,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:59:47,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:59:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:59:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:59:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:59:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:47,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:59:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:59:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080028931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:59:48,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:59:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-30 20:59:48,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618270864] [2023-08-30 20:59:48,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:59:48,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:59:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:59:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:59:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:59:48,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 20:59:48,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1184 transitions, 30723 flow. Second operand has 25 states, 25 states have (on average 57.6) internal successors, (1440), 25 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:59:48,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:59:48,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 20:59:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:59:56,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 21:00:11,937 INFO L130 PetriNetUnfolder]: 4067/8471 cut-off events. [2023-08-30 21:00:11,937 INFO L131 PetriNetUnfolder]: For 528149/528149 co-relation queries the response was YES. [2023-08-30 21:00:12,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97559 conditions, 8471 events. 4067/8471 cut-off events. For 528149/528149 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 75394 event pairs, 120 based on Foata normal form. 84/8555 useless extension candidates. Maximal degree in co-relation 96148. Up to 2171 conditions per place. [2023-08-30 21:00:12,047 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 679 selfloop transitions, 977 changer transitions 10/1666 dead transitions. [2023-08-30 21:00:12,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1666 transitions, 43751 flow [2023-08-30 21:00:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 21:00:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 21:00:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3682 transitions. [2023-08-30 21:00:12,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43215962441314554 [2023-08-30 21:00:12,051 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3682 transitions. [2023-08-30 21:00:12,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3682 transitions. [2023-08-30 21:00:12,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:12,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3682 transitions. [2023-08-30 21:00:12,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 61.36666666666667) internal successors, (3682), 60 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:12,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:12,063 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:12,063 INFO L175 Difference]: Start difference. First operand has 406 places, 1184 transitions, 30723 flow. Second operand 60 states and 3682 transitions. [2023-08-30 21:00:12,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1666 transitions, 43751 flow [2023-08-30 21:00:17,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1666 transitions, 42889 flow, removed 260 selfloop flow, removed 22 redundant places. [2023-08-30 21:00:17,277 INFO L231 Difference]: Finished difference. Result has 461 places, 1386 transitions, 39073 flow [2023-08-30 21:00:17,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=29831, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=39073, PETRI_PLACES=461, PETRI_TRANSITIONS=1386} [2023-08-30 21:00:17,278 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 441 predicate places. [2023-08-30 21:00:17,278 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1386 transitions, 39073 flow [2023-08-30 21:00:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.6) internal successors, (1440), 25 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:17,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:17,279 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:17,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:17,483 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 [2023-08-30 21:00:17,483 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:17,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 17 times [2023-08-30 21:00:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094154460] [2023-08-30 21:00:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:17,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:17,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094154460] [2023-08-30 21:00:17,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094154460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224370008] [2023-08-30 21:00:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:00:17,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:17,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:17,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:17,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:00:17,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:00:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:00:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:17,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224370008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:20,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:20,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 21:00:20,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464101570] [2023-08-30 21:00:20,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:20,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:00:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:00:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:00:21,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 21:00:21,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1386 transitions, 39073 flow. Second operand has 22 states, 22 states have (on average 57.77272727272727) internal successors, (1271), 22 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:21,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:21,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 21:00:21,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:27,692 INFO L130 PetriNetUnfolder]: 4927/10281 cut-off events. [2023-08-30 21:00:27,692 INFO L131 PetriNetUnfolder]: For 889816/889816 co-relation queries the response was YES. [2023-08-30 21:00:27,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130179 conditions, 10281 events. 4927/10281 cut-off events. For 889816/889816 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 95038 event pairs, 268 based on Foata normal form. 136/10417 useless extension candidates. Maximal degree in co-relation 128823. Up to 2289 conditions per place. [2023-08-30 21:00:27,843 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 621 selfloop transitions, 1222 changer transitions 20/1863 dead transitions. [2023-08-30 21:00:27,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1863 transitions, 54991 flow [2023-08-30 21:00:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 21:00:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 21:00:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2908 transitions. [2023-08-30 21:00:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43572070722205575 [2023-08-30 21:00:27,845 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2908 transitions. [2023-08-30 21:00:27,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2908 transitions. [2023-08-30 21:00:27,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:27,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2908 transitions. [2023-08-30 21:00:27,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 61.87234042553192) internal successors, (2908), 47 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,852 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:27,852 INFO L175 Difference]: Start difference. First operand has 461 places, 1386 transitions, 39073 flow. Second operand 47 states and 2908 transitions. [2023-08-30 21:00:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1863 transitions, 54991 flow [2023-08-30 21:00:36,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1863 transitions, 53729 flow, removed 488 selfloop flow, removed 28 redundant places. [2023-08-30 21:00:36,510 INFO L231 Difference]: Finished difference. Result has 497 places, 1664 transitions, 51476 flow [2023-08-30 21:00:36,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=38015, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=978, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=51476, PETRI_PLACES=497, PETRI_TRANSITIONS=1664} [2023-08-30 21:00:36,511 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 477 predicate places. [2023-08-30 21:00:36,511 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1664 transitions, 51476 flow [2023-08-30 21:00:36,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.77272727272727) internal successors, (1271), 22 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:36,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:00:36,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:00:36,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:00:36,716 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 [2023-08-30 21:00:36,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:00:36,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:00:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 18 times [2023-08-30 21:00:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:00:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308970032] [2023-08-30 21:00:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:00:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:00:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:00:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:36,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:00:36,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308970032] [2023-08-30 21:00:36,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308970032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:00:36,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045968199] [2023-08-30 21:00:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:00:36,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:00:36,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:00:36,914 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:00:36,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:00:36,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:00:36,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:00:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:00:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:00:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:37,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:00:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:00:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045968199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:00:37,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:00:37,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 21:00:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298915929] [2023-08-30 21:00:37,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:00:37,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:00:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:00:37,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:00:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:00:37,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 21:00:37,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1664 transitions, 51476 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) [2023-08-30 21:00:37,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:00:37,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 21:00:37,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:00:49,347 INFO L130 PetriNetUnfolder]: 5533/11553 cut-off events. [2023-08-30 21:00:49,348 INFO L131 PetriNetUnfolder]: For 1105732/1105732 co-relation queries the response was YES. [2023-08-30 21:00:49,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157828 conditions, 11553 events. 5533/11553 cut-off events. For 1105732/1105732 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 108774 event pairs, 241 based on Foata normal form. 270/11823 useless extension candidates. Maximal degree in co-relation 156778. Up to 4676 conditions per place. [2023-08-30 21:00:49,558 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 815 selfloop transitions, 1234 changer transitions 23/2072 dead transitions. [2023-08-30 21:00:49,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 2072 transitions, 67524 flow [2023-08-30 21:00:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 21:00:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 21:00:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2715 transitions. [2023-08-30 21:00:49,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446446118571897 [2023-08-30 21:00:49,592 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2715 transitions. [2023-08-30 21:00:49,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2715 transitions. [2023-08-30 21:00:49,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:00:49,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2715 transitions. [2023-08-30 21:00:49,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 63.13953488372093) internal successors, (2715), 43 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:49,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:49,600 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:00:49,601 INFO L175 Difference]: Start difference. First operand has 497 places, 1664 transitions, 51476 flow. Second operand 43 states and 2715 transitions. [2023-08-30 21:00:49,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 2072 transitions, 67524 flow [2023-08-30 21:01:05,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 2072 transitions, 62879 flow, removed 2224 selfloop flow, removed 21 redundant places. [2023-08-30 21:01:05,094 INFO L231 Difference]: Finished difference. Result has 529 places, 1875 transitions, 59622 flow [2023-08-30 21:01:05,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=47371, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=59622, PETRI_PLACES=529, PETRI_TRANSITIONS=1875} [2023-08-30 21:01:05,095 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 509 predicate places. [2023-08-30 21:01:05,095 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1875 transitions, 59622 flow [2023-08-30 21:01:05,095 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) [2023-08-30 21:01:05,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:05,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:05,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 21:01:05,299 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 [2023-08-30 21:01:05,300 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:05,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 711617715, now seen corresponding path program 19 times [2023-08-30 21:01:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107983443] [2023-08-30 21:01:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:05,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107983443] [2023-08-30 21:01:05,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107983443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:05,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351801508] [2023-08-30 21:01:05,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:01:05,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:05,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:05,513 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:05,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:01:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:01:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:05,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351801508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:06,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:06,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 21:01:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335072049] [2023-08-30 21:01:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:06,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:01:06,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:01:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:01:06,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 21:01:06,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1875 transitions, 59622 flow. Second operand has 21 states, 21 states have (on average 57.523809523809526) internal successors, (1208), 21 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:06,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:06,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 21:01:06,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:18,698 INFO L130 PetriNetUnfolder]: 6129/12908 cut-off events. [2023-08-30 21:01:18,698 INFO L131 PetriNetUnfolder]: For 1256850/1256850 co-relation queries the response was YES. [2023-08-30 21:01:18,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175220 conditions, 12908 events. 6129/12908 cut-off events. For 1256850/1256850 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 124057 event pairs, 765 based on Foata normal form. 48/12956 useless extension candidates. Maximal degree in co-relation 175048. Up to 3125 conditions per place. [2023-08-30 21:01:18,900 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 943 selfloop transitions, 1304 changer transitions 14/2261 dead transitions. [2023-08-30 21:01:18,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 2261 transitions, 74823 flow [2023-08-30 21:01:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 21:01:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 21:01:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3124 transitions. [2023-08-30 21:01:18,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2023-08-30 21:01:18,903 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3124 transitions. [2023-08-30 21:01:18,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3124 transitions. [2023-08-30 21:01:18,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:18,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3124 transitions. [2023-08-30 21:01:18,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.254901960784316) internal successors, (3124), 51 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:18,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:18,910 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:18,910 INFO L175 Difference]: Start difference. First operand has 529 places, 1875 transitions, 59622 flow. Second operand 51 states and 3124 transitions. [2023-08-30 21:01:18,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 2261 transitions, 74823 flow [2023-08-30 21:01:39,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2261 transitions, 73479 flow, removed 593 selfloop flow, removed 26 redundant places. [2023-08-30 21:01:39,777 INFO L231 Difference]: Finished difference. Result has 566 places, 2016 transitions, 68325 flow [2023-08-30 21:01:39,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=57821, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=68325, PETRI_PLACES=566, PETRI_TRANSITIONS=2016} [2023-08-30 21:01:39,779 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 546 predicate places. [2023-08-30 21:01:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 2016 transitions, 68325 flow [2023-08-30 21:01:39,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.523809523809526) internal successors, (1208), 21 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:39,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:01:39,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:01:39,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:01:39,984 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 [2023-08-30 21:01:39,984 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:01:39,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:01:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1918400809, now seen corresponding path program 20 times [2023-08-30 21:01:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:01:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310610153] [2023-08-30 21:01:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:01:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:01:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:01:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:01:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310610153] [2023-08-30 21:01:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310610153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:01:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882437194] [2023-08-30 21:01:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:01:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:01:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:01:40,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:01:40,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:01:40,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:01:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:01:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:01:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:01:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:40,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:01:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:01:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882437194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:01:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:01:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-30 21:01:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123827448] [2023-08-30 21:01:40,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:01:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 21:01:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:01:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 21:01:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-30 21:01:40,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 21:01:40,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 2016 transitions, 68325 flow. Second operand has 22 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:40,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:01:40,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 21:01:40,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:01:52,413 INFO L130 PetriNetUnfolder]: 6550/13690 cut-off events. [2023-08-30 21:01:52,413 INFO L131 PetriNetUnfolder]: For 1385988/1385988 co-relation queries the response was YES. [2023-08-30 21:01:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191921 conditions, 13690 events. 6550/13690 cut-off events. For 1385988/1385988 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 131829 event pairs, 1070 based on Foata normal form. 102/13792 useless extension candidates. Maximal degree in co-relation 191738. Up to 10225 conditions per place. [2023-08-30 21:01:52,651 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 1904 selfloop transitions, 469 changer transitions 14/2387 dead transitions. [2023-08-30 21:01:52,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 2387 transitions, 81713 flow [2023-08-30 21:01:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 21:01:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 21:01:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3028 transitions. [2023-08-30 21:01:52,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43518252371371086 [2023-08-30 21:01:52,654 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3028 transitions. [2023-08-30 21:01:52,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3028 transitions. [2023-08-30 21:01:52,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:01:52,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3028 transitions. [2023-08-30 21:01:52,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 61.795918367346935) internal successors, (3028), 49 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:52,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:52,661 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:01:52,661 INFO L175 Difference]: Start difference. First operand has 566 places, 2016 transitions, 68325 flow. Second operand 49 states and 3028 transitions. [2023-08-30 21:01:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 2387 transitions, 81713 flow [2023-08-30 21:02:16,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 2387 transitions, 79833 flow, removed 535 selfloop flow, removed 20 redundant places. [2023-08-30 21:02:16,104 INFO L231 Difference]: Finished difference. Result has 608 places, 2135 transitions, 72265 flow [2023-08-30 21:02:16,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=66411, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=72265, PETRI_PLACES=608, PETRI_TRANSITIONS=2135} [2023-08-30 21:02:16,105 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 588 predicate places. [2023-08-30 21:02:16,105 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 2135 transitions, 72265 flow [2023-08-30 21:02:16,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:16,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:02:16,105 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:02:16,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:02:16,306 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 [2023-08-30 21:02:16,306 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:02:16,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:02:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1462861319, now seen corresponding path program 21 times [2023-08-30 21:02:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:02:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388365136] [2023-08-30 21:02:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:02:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:02:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:02:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:02:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388365136] [2023-08-30 21:02:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388365136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:02:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233742522] [2023-08-30 21:02:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:02:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:02:16,508 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:02:16,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:02:16,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:02:16,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:02:16,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:02:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:02:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:02:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233742522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:02:17,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:02:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 21:02:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451922528] [2023-08-30 21:02:17,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:02:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:02:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:02:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:02:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:02:17,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-08-30 21:02:17,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 2135 transitions, 72265 flow. Second operand has 20 states, 20 states have (on average 59.75) internal successors, (1195), 20 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:17,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:02:17,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-08-30 21:02:17,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:02:30,225 INFO L130 PetriNetUnfolder]: 6667/13892 cut-off events. [2023-08-30 21:02:30,225 INFO L131 PetriNetUnfolder]: For 1519878/1519878 co-relation queries the response was YES. [2023-08-30 21:02:30,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197991 conditions, 13892 events. 6667/13892 cut-off events. For 1519878/1519878 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 133682 event pairs, 509 based on Foata normal form. 40/13932 useless extension candidates. Maximal degree in co-relation 197794. Up to 5206 conditions per place. [2023-08-30 21:02:30,464 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1101 selfloop transitions, 1201 changer transitions 19/2321 dead transitions. [2023-08-30 21:02:30,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 2321 transitions, 80361 flow [2023-08-30 21:02:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 21:02:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 21:02:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2524 transitions. [2023-08-30 21:02:30,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4443661971830986 [2023-08-30 21:02:30,467 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2524 transitions. [2023-08-30 21:02:30,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2524 transitions. [2023-08-30 21:02:30,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:02:30,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2524 transitions. [2023-08-30 21:02:30,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 63.1) internal successors, (2524), 40 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:30,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:30,472 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:30,472 INFO L175 Difference]: Start difference. First operand has 608 places, 2135 transitions, 72265 flow. Second operand 40 states and 2524 transitions. [2023-08-30 21:02:30,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 2321 transitions, 80361 flow [2023-08-30 21:02:56,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 2321 transitions, 79497 flow, removed 335 selfloop flow, removed 19 redundant places. [2023-08-30 21:02:56,289 INFO L231 Difference]: Finished difference. Result has 633 places, 2185 transitions, 76661 flow [2023-08-30 21:02:56,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=71396, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=76661, PETRI_PLACES=633, PETRI_TRANSITIONS=2185} [2023-08-30 21:02:56,290 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 613 predicate places. [2023-08-30 21:02:56,290 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 2185 transitions, 76661 flow [2023-08-30 21:02:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.75) internal successors, (1195), 20 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:02:56,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:02:56,291 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:02:56,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:02:56,491 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 [2023-08-30 21:02:56,491 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:02:56,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:02:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1036976111, now seen corresponding path program 22 times [2023-08-30 21:02:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:02:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046988021] [2023-08-30 21:02:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:02:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:02:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:02:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:02:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046988021] [2023-08-30 21:02:56,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046988021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:02:56,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467704003] [2023-08-30 21:02:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:02:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:02:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:02:56,678 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:02:56,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:02:56,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:02:56,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:02:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:02:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:02:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:02:56,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:03:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:02,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467704003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:03:02,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:03:02,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-08-30 21:03:02,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278577837] [2023-08-30 21:03:02,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:03:02,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:03:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:03:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:03:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:03:02,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-08-30 21:03:02,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 2185 transitions, 76661 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:02,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:03:02,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-08-30 21:03:02,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:03:17,120 INFO L130 PetriNetUnfolder]: 6833/14128 cut-off events. [2023-08-30 21:03:17,120 INFO L131 PetriNetUnfolder]: For 1686463/1686463 co-relation queries the response was YES. [2023-08-30 21:03:17,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208009 conditions, 14128 events. 6833/14128 cut-off events. For 1686463/1686463 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 135341 event pairs, 1547 based on Foata normal form. 144/14272 useless extension candidates. Maximal degree in co-relation 207807. Up to 9139 conditions per place. [2023-08-30 21:03:17,373 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 1321 selfloop transitions, 1056 changer transitions 0/2377 dead transitions. [2023-08-30 21:03:17,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 2377 transitions, 85995 flow [2023-08-30 21:03:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 21:03:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 21:03:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1846 transitions. [2023-08-30 21:03:17,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-08-30 21:03:17,375 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1846 transitions. [2023-08-30 21:03:17,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1846 transitions. [2023-08-30 21:03:17,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:03:17,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1846 transitions. [2023-08-30 21:03:17,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 61.53333333333333) internal successors, (1846), 30 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:17,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:17,379 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:17,379 INFO L175 Difference]: Start difference. First operand has 633 places, 2185 transitions, 76661 flow. Second operand 30 states and 1846 transitions. [2023-08-30 21:03:17,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 2377 transitions, 85995 flow [2023-08-30 21:03:44,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2377 transitions, 85434 flow, removed 150 selfloop flow, removed 21 redundant places. [2023-08-30 21:03:44,539 INFO L231 Difference]: Finished difference. Result has 648 places, 2269 transitions, 82093 flow [2023-08-30 21:03:44,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=75807, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=970, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=82093, PETRI_PLACES=648, PETRI_TRANSITIONS=2269} [2023-08-30 21:03:44,541 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2023-08-30 21:03:44,541 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 2269 transitions, 82093 flow [2023-08-30 21:03:44,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:03:44,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:03:44,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:03:44,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:03:44,741 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 [2023-08-30 21:03:44,741 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:03:44,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:03:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash -813404643, now seen corresponding path program 23 times [2023-08-30 21:03:44,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:03:44,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823055996] [2023-08-30 21:03:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:03:44,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:03:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:03:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:03:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823055996] [2023-08-30 21:03:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823055996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:03:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576927740] [2023-08-30 21:03:44,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:03:44,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:03:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:03:44,937 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:03:44,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:03:45,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:03:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:03:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:03:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:03:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:03:45,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:04:12,536 WARN L222 SmtUtils]: Spent 25.34s on a formula simplification. DAG size of input: 1593 DAG size of output: 1588 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15