./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:03:39,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:03:39,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:03:39,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:03:39,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:03:39,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:03:39,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:03:39,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:03:39,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:03:39,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:03:39,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:03:39,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:03:39,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:03:39,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:03:39,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:03:39,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:03:39,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:03:39,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:03:39,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:03:39,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:03:39,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:03:39,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:03:39,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:03:39,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:03:39,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:03:39,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:03:39,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:03:39,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:03:39,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:03:39,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:03:39,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:03:39,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:03:39,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:03:39,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:03:39,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:03:39,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:03:39,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:03:39,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:03:39,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:03:39,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:03:39,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:03:39,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:03:39,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:03:39,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:03:39,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:03:39,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:03:39,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:03:39,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:03:39,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:03:39,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:03:39,410 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:03:39,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:03:39,410 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:03:39,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:03:39,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:03:39,412 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:03:39,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:03:39,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:03:39,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:03:39,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:03:39,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:03:39,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:03:39,413 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:03:39,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:03:39,414 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:03:39,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:03:39,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:03:39,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:03:39,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:03:39,685 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:03:39,685 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:03:39,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 14:03:40,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:03:40,733 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:03:40,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 14:03:40,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773763ac9/d46366679252486599c787938f98a7b0/FLAG87c8b41f5 [2023-09-01 14:03:40,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773763ac9/d46366679252486599c787938f98a7b0 [2023-09-01 14:03:40,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:03:40,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:03:40,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:03:40,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:03:40,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:03:40,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34854bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40, skipping insertion in model container [2023-09-01 14:03:40,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:03:40,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:03:40,909 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] [2023-09-01 14:03:40,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:03:40,919 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:03:40,938 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] [2023-09-01 14:03:40,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:03:40,947 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:03:40,947 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:03:40,952 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:03:40,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40 WrapperNode [2023-09-01 14:03:40,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:03:40,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:03:40,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:03:40,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:03:40,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,981 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-09-01 14:03:40,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:03:40,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:03:40,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:03:40,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:03:40,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:40,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:03:41,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:03:41,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:03:41,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:03:41,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (1/1) ... [2023-09-01 14:03:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:03:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:41,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:03:41,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:03:41,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:03:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:03:41,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:03:41,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:03:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:03:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:03:41,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:03:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:03:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:03:41,069 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:03:41,127 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:03:41,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:03:41,277 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:03:41,297 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:03:41,298 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 14:03:41,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:03:41 BoogieIcfgContainer [2023-09-01 14:03:41,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:03:41,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:03:41,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:03:41,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:03:41,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:03:40" (1/3) ... [2023-09-01 14:03:41,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8e6e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:03:41, skipping insertion in model container [2023-09-01 14:03:41,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:03:40" (2/3) ... [2023-09-01 14:03:41,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8e6e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:03:41, skipping insertion in model container [2023-09-01 14:03:41,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:03:41" (3/3) ... [2023-09-01 14:03:41,304 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 14:03:41,309 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:03:41,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:03:41,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:03:41,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:03:41,355 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:03:41,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-09-01 14:03:41,408 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-09-01 14:03:41,408 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:03:41,411 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. [2023-09-01 14:03:41,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-09-01 14:03:41,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-09-01 14:03:41,416 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:03:41,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-09-01 14:03:41,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-09-01 14:03:41,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-09-01 14:03:41,445 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-09-01 14:03:41,446 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:03:41,446 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. [2023-09-01 14:03:41,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-09-01 14:03:42,946 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-09-01 14:03:42,947 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-09-01 14:03:42,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:03:42,960 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;@74097dba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:03:42,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:03:42,963 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 14:03:42,964 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:03:42,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:42,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:42,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:42,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-09-01 14:03:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227793676] [2023-09-01 14:03:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227793676] [2023-09-01 14:03:43,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227793676] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:03:43,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:03:43,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:03:43,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585482625] [2023-09-01 14:03:43,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:03:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:03:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:03:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:03:43,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-09-01 14:03:43,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:03:43,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:43,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-09-01 14:03:43,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:43,456 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-09-01 14:03:43,456 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 14:03:43,457 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. [2023-09-01 14:03:43,460 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-09-01 14:03:43,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-09-01 14:03:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:03:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:03:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-09-01 14:03:43,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48063380281690143 [2023-09-01 14:03:43,477 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-09-01 14:03:43,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-09-01 14:03:43,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:43,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-09-01 14:03:43,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:03:43,485 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) [2023-09-01 14:03:43,485 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) [2023-09-01 14:03:43,486 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-09-01 14:03:43,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-09-01 14:03:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:03:43,489 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-09-01 14:03:43,490 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} [2023-09-01 14:03:43,492 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-09-01 14:03:43,492 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-09-01 14:03:43,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:03:43,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:43,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:03:43,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:43,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-09-01 14:03:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:43,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762753892] [2023-09-01 14:03:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:43,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:43,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762753892] [2023-09-01 14:03:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762753892] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:03:43,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:03:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:03:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642459340] [2023-09-01 14:03:43,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:03:43,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:03:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:03:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:03:43,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-09-01 14:03:43,602 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) [2023-09-01 14:03:43,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:43,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-09-01 14:03:43,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:43,662 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-09-01 14:03:43,662 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-09-01 14:03:43,663 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. [2023-09-01 14:03:43,663 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-09-01 14:03:43,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-09-01 14:03:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:03:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:03:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2023-09-01 14:03:43,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894366197183099 [2023-09-01 14:03:43,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2023-09-01 14:03:43,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2023-09-01 14:03:43,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:43,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2023-09-01 14:03:43,670 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) [2023-09-01 14:03:43,672 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) [2023-09-01 14:03:43,673 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) [2023-09-01 14:03:43,673 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 278 transitions. [2023-09-01 14:03:43,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-09-01 14:03:43,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:03:43,675 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-09-01 14:03:43,675 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} [2023-09-01 14:03:43,675 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 14:03:43,676 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-09-01 14:03:43,676 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) [2023-09-01 14:03:43,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:43,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:03:43,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:43,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-09-01 14:03:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034885438] [2023-09-01 14:03:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:43,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:43,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:43,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034885438] [2023-09-01 14:03:43,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034885438] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:43,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306269206] [2023-09-01 14:03:43,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:03:43,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:43,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:43,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:03:43,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 14:03:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:03:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:43,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:03:43,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306269206] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:03:43,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:03:43,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-09-01 14:03:43,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163334452] [2023-09-01 14:03:43,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:03:43,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:03:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:43,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:03:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:03:43,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-09-01 14:03:43,976 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) [2023-09-01 14:03:43,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:43,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-09-01 14:03:43,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:44,009 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-09-01 14:03:44,009 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-09-01 14:03:44,010 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. [2023-09-01 14:03:44,010 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-09-01 14:03:44,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-09-01 14:03:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:03:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:03:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-09-01 14:03:44,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735915492957746 [2023-09-01 14:03:44,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-09-01 14:03:44,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-09-01 14:03:44,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:44,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-09-01 14:03:44,018 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) [2023-09-01 14:03:44,019 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) [2023-09-01 14:03:44,019 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) [2023-09-01 14:03:44,019 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 269 transitions. [2023-09-01 14:03:44,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-09-01 14:03:44,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 14:03:44,021 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-09-01 14:03:44,021 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} [2023-09-01 14:03:44,022 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 14:03:44,022 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-09-01 14:03:44,023 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) [2023-09-01 14:03:44,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:44,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:44,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:44,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:44,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-09-01 14:03:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36673988] [2023-09-01 14:03:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:44,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36673988] [2023-09-01 14:03:44,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36673988] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409113418] [2023-09-01 14:03:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:44,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:44,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:03:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:44,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:03:44,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:44,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409113418] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:44,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:03:44,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-09-01 14:03:44,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543752042] [2023-09-01 14:03:44,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:03:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:03:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:03:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:03:44,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-09-01 14:03:44,813 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) [2023-09-01 14:03:44,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:44,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-09-01 14:03:44,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:44,875 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-09-01 14:03:44,876 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-09-01 14:03:44,878 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. [2023-09-01 14:03:44,879 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-09-01 14:03:44,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-09-01 14:03:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:03:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:03:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2023-09-01 14:03:44,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-09-01 14:03:44,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2023-09-01 14:03:44,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2023-09-01 14:03:44,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:44,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2023-09-01 14:03:44,881 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) [2023-09-01 14:03:44,882 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) [2023-09-01 14:03:44,883 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) [2023-09-01 14:03:44,883 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 284 transitions. [2023-09-01 14:03:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-09-01 14:03:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 14:03:44,885 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-09-01 14:03:44,885 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} [2023-09-01 14:03:44,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 14:03:44,886 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-09-01 14:03:44,886 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) [2023-09-01 14:03:44,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:44,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:44,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:03:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 14:03:45,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:45,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-09-01 14:03:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443080048] [2023-09-01 14:03:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:45,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443080048] [2023-09-01 14:03:45,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443080048] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788352728] [2023-09-01 14:03:45,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:03:45,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:45,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:45,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:45,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:03:45,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:03:45,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:03:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:45,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:45,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788352728] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:45,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:45,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-09-01 14:03:45,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530958510] [2023-09-01 14:03:45,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 14:03:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 14:03:45,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:03:45,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:03:45,722 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) [2023-09-01 14:03:45,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:45,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:03:45,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:46,010 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-09-01 14:03:46,010 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-09-01 14:03:46,011 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. [2023-09-01 14:03:46,012 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-09-01 14:03:46,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-09-01 14:03:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 14:03:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 14:03:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 939 transitions. [2023-09-01 14:03:46,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44084507042253523 [2023-09-01 14:03:46,015 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 939 transitions. [2023-09-01 14:03:46,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 939 transitions. [2023-09-01 14:03:46,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:46,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 939 transitions. [2023-09-01 14:03:46,017 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) [2023-09-01 14:03:46,020 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) [2023-09-01 14:03:46,020 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) [2023-09-01 14:03:46,020 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 939 transitions. [2023-09-01 14:03:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-09-01 14:03:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:03:46,025 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-09-01 14:03:46,026 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} [2023-09-01 14:03:46,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-09-01 14:03:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-09-01 14:03:46,027 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) [2023-09-01 14:03:46,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:46,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:46,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 14:03:46,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:46,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:46,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-09-01 14:03:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737552298] [2023-09-01 14:03:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737552298] [2023-09-01 14:03:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737552298] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440329118] [2023-09-01 14:03:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:03:46,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:46,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:46,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:03:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:03:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:03:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:46,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440329118] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:46,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 14:03:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580543800] [2023-09-01 14:03:46,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:03:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:03:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:03:46,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:03:46,770 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) [2023-09-01 14:03:46,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:46,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:03:46,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:47,242 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-09-01 14:03:47,242 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-09-01 14:03:47,243 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. [2023-09-01 14:03:47,245 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-09-01 14:03:47,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-09-01 14:03:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:03:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:03:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1028 transitions. [2023-09-01 14:03:47,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-09-01 14:03:47,248 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1028 transitions. [2023-09-01 14:03:47,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1028 transitions. [2023-09-01 14:03:47,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:47,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1028 transitions. [2023-09-01 14:03:47,252 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) [2023-09-01 14:03:47,254 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) [2023-09-01 14:03:47,255 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) [2023-09-01 14:03:47,255 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 1028 transitions. [2023-09-01 14:03:47,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-09-01 14:03:47,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-09-01 14:03:47,262 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-09-01 14:03:47,262 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} [2023-09-01 14:03:47,264 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-09-01 14:03:47,264 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-09-01 14:03:47,265 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) [2023-09-01 14:03:47,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:47,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:47,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 14:03:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:47,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:47,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-09-01 14:03:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:47,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695430209] [2023-09-01 14:03:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:47,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695430209] [2023-09-01 14:03:47,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695430209] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475388608] [2023-09-01 14:03:47,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:03:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:47,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:47,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:03:47,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:03:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:03:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:47,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475388608] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:47,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:47,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:03:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061152559] [2023-09-01 14:03:47,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:03:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:03:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:03:47,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:03:47,988 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) [2023-09-01 14:03:47,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:47,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:03:47,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:48,462 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-09-01 14:03:48,462 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-09-01 14:03:48,464 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. [2023-09-01 14:03:48,467 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-09-01 14:03:48,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-09-01 14:03:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:03:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:03:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1226 transitions. [2023-09-01 14:03:48,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45441067457375833 [2023-09-01 14:03:48,470 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1226 transitions. [2023-09-01 14:03:48,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1226 transitions. [2023-09-01 14:03:48,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:48,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1226 transitions. [2023-09-01 14:03:48,472 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) [2023-09-01 14:03:48,475 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) [2023-09-01 14:03:48,475 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) [2023-09-01 14:03:48,475 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1226 transitions. [2023-09-01 14:03:48,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-09-01 14:03:48,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-09-01 14:03:48,487 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-09-01 14:03:48,487 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} [2023-09-01 14:03:48,488 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-09-01 14:03:48,488 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-09-01 14:03:48,488 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) [2023-09-01 14:03:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:48,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:48,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:48,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:48,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-09-01 14:03:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711982647] [2023-09-01 14:03:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:48,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:48,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:48,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711982647] [2023-09-01 14:03:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711982647] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192898591] [2023-09-01 14:03:48,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:03:48,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:48,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:48,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:48,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:03:48,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:03:48,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:03:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:48,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192898591] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:49,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:03:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491813339] [2023-09-01 14:03:49,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:03:49,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:03:49,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:03:49,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-09-01 14:03:49,359 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) [2023-09-01 14:03:49,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:49,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-09-01 14:03:49,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:50,448 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-09-01 14:03:50,449 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-09-01 14:03:50,451 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. [2023-09-01 14:03:50,456 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-09-01 14:03:50,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-09-01 14:03:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:03:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:03:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1997 transitions. [2023-09-01 14:03:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687793427230047 [2023-09-01 14:03:50,461 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1997 transitions. [2023-09-01 14:03:50,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1997 transitions. [2023-09-01 14:03:50,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:50,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1997 transitions. [2023-09-01 14:03:50,465 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) [2023-09-01 14:03:50,469 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) [2023-09-01 14:03:50,470 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) [2023-09-01 14:03:50,470 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1997 transitions. [2023-09-01 14:03:50,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-09-01 14:03:50,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-09-01 14:03:50,504 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-09-01 14:03:50,505 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} [2023-09-01 14:03:50,506 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-09-01 14:03:50,506 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-09-01 14:03:50,506 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) [2023-09-01 14:03:50,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:50,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:50,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:50,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:50,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-09-01 14:03:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613751495] [2023-09-01 14:03:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:50,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613751495] [2023-09-01 14:03:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613751495] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242287821] [2023-09-01 14:03:50,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:03:50,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:50,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:50,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:03:50,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:03:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:03:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:50,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:51,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242287821] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:51,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:51,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-09-01 14:03:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091885342] [2023-09-01 14:03:51,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:51,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:03:51,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:03:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:03:51,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-09-01 14:03:51,334 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) [2023-09-01 14:03:51,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:51,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-09-01 14:03:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:52,143 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-09-01 14:03:52,143 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-09-01 14:03:52,147 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. [2023-09-01 14:03:52,152 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-09-01 14:03:52,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-09-01 14:03:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:03:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:03:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1119 transitions. [2023-09-01 14:03:52,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635459817729909 [2023-09-01 14:03:52,156 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1119 transitions. [2023-09-01 14:03:52,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1119 transitions. [2023-09-01 14:03:52,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:52,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1119 transitions. [2023-09-01 14:03:52,159 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) [2023-09-01 14:03:52,161 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) [2023-09-01 14:03:52,162 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) [2023-09-01 14:03:52,162 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1119 transitions. [2023-09-01 14:03:52,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-09-01 14:03:52,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-09-01 14:03:52,211 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-09-01 14:03:52,211 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} [2023-09-01 14:03:52,211 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-09-01 14:03:52,211 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-09-01 14:03:52,212 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) [2023-09-01 14:03:52,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:52,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:52,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:52,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:52,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-09-01 14:03:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759545591] [2023-09-01 14:03:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759545591] [2023-09-01 14:03:52,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759545591] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62969578] [2023-09-01 14:03:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:03:52,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:52,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:52,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:52,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:03:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:52,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:03:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:52,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62969578] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:52,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:52,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 14:03:52,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267499663] [2023-09-01 14:03:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:03:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:03:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:03:52,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:03:52,822 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) [2023-09-01 14:03:52,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:52,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:03:52,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:53,547 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-09-01 14:03:53,548 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-09-01 14:03:53,553 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. [2023-09-01 14:03:53,561 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-09-01 14:03:53,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-09-01 14:03:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:03:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:03:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1481 transitions. [2023-09-01 14:03:53,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345988977342316 [2023-09-01 14:03:53,568 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1481 transitions. [2023-09-01 14:03:53,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1481 transitions. [2023-09-01 14:03:53,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:53,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1481 transitions. [2023-09-01 14:03:53,574 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) [2023-09-01 14:03:53,578 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) [2023-09-01 14:03:53,579 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) [2023-09-01 14:03:53,579 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1481 transitions. [2023-09-01 14:03:53,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-09-01 14:03:53,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-09-01 14:03:53,696 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-09-01 14:03:53,696 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} [2023-09-01 14:03:53,696 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-09-01 14:03:53,696 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-09-01 14:03:53,697 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) [2023-09-01 14:03:53,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:53,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:53,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 14:03:53,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:53,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-09-01 14:03:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343795527] [2023-09-01 14:03:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:54,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:54,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343795527] [2023-09-01 14:03:54,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343795527] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:54,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830534399] [2023-09-01 14:03:54,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:03:54,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:54,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:54,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:03:54,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:03:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:54,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:03:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:54,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830534399] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:54,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 14:03:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513278017] [2023-09-01 14:03:54,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:03:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:03:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:03:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-09-01 14:03:54,555 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) [2023-09-01 14:03:54,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:54,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-09-01 14:03:54,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:55,884 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-09-01 14:03:55,884 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-09-01 14:03:55,892 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. [2023-09-01 14:03:55,901 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-09-01 14:03:55,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-09-01 14:03:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:03:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:03:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1459 transitions. [2023-09-01 14:03:55,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46702944942381563 [2023-09-01 14:03:55,903 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1459 transitions. [2023-09-01 14:03:55,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1459 transitions. [2023-09-01 14:03:55,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:55,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1459 transitions. [2023-09-01 14:03:55,905 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) [2023-09-01 14:03:55,908 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) [2023-09-01 14:03:55,908 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) [2023-09-01 14:03:55,908 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1459 transitions. [2023-09-01 14:03:55,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-09-01 14:03:56,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-09-01 14:03:56,094 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-09-01 14:03:56,094 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} [2023-09-01 14:03:56,094 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-09-01 14:03:56,094 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-09-01 14:03:56,095 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) [2023-09-01 14:03:56,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:56,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:56,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:56,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:56,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:56,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-09-01 14:03:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930789574] [2023-09-01 14:03:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930789574] [2023-09-01 14:03:56,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930789574] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074403194] [2023-09-01 14:03:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:03:56,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:56,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:56,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:03:56,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:03:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:56,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:03:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:56,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:57,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074403194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:57,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-09-01 14:03:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178178374] [2023-09-01 14:03:57,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:57,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:03:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:03:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:03:57,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:03:57,141 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) [2023-09-01 14:03:57,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:57,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:03:57,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:03:57,719 INFO L130 PetriNetUnfolder]: 1299/2549 cut-off events. [2023-09-01 14:03:57,719 INFO L131 PetriNetUnfolder]: For 103937/103953 co-relation queries the response was YES. [2023-09-01 14:03:57,730 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. [2023-09-01 14:03:57,740 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 241 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-09-01 14:03:57,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9139 flow [2023-09-01 14:03:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:03:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:03:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 719 transitions. [2023-09-01 14:03:57,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46030729833546735 [2023-09-01 14:03:57,742 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 719 transitions. [2023-09-01 14:03:57,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 719 transitions. [2023-09-01 14:03:57,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:03:57,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 719 transitions. [2023-09-01 14:03:57,743 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) [2023-09-01 14:03:57,745 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) [2023-09-01 14:03:57,745 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) [2023-09-01 14:03:57,745 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 719 transitions. [2023-09-01 14:03:57,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9139 flow [2023-09-01 14:03:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8886 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-09-01 14:03:58,026 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-09-01 14:03:58,026 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} [2023-09-01 14:03:58,026 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-09-01 14:03:58,026 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-09-01 14:03:58,027 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) [2023-09-01 14:03:58,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:03:58,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:03:58,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:03:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 14:03:58,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:03:58,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:03:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-09-01 14:03:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:03:58,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229620213] [2023-09-01 14:03:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:03:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:03:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:03:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:03:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:03:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229620213] [2023-09-01 14:03:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229620213] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:03:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449518093] [2023-09-01 14:03:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:03:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:03:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:03:58,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:03:58,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:03:58,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:03:58,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:03:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:03:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:03:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:58,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:03:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:03:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449518093] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:03:58,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:03:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-09-01 14:03:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982661082] [2023-09-01 14:03:58,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:03:58,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:03:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:03:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:03:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:03:58,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:03:58,893 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) [2023-09-01 14:03:58,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:03:58,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:03:58,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:00,126 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-09-01 14:04:00,126 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-09-01 14:04:00,136 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. [2023-09-01 14:04:00,146 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-09-01 14:04:00,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-09-01 14:04:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:04:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:04:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2005 transitions. [2023-09-01 14:04:00,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278702518139138 [2023-09-01 14:04:00,148 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2005 transitions. [2023-09-01 14:04:00,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2005 transitions. [2023-09-01 14:04:00,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:04:00,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2005 transitions. [2023-09-01 14:04:00,151 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) [2023-09-01 14:04:00,155 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) [2023-09-01 14:04:00,165 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) [2023-09-01 14:04:00,165 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 2005 transitions. [2023-09-01 14:04:00,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-09-01 14:04:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-09-01 14:04:00,464 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-09-01 14:04:00,465 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} [2023-09-01 14:04:00,465 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-09-01 14:04:00,465 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-09-01 14:04:00,466 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) [2023-09-01 14:04:00,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:04:00,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:04:00,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 14:04:00,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:04:00,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:04:00,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:04:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-09-01 14:04:00,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:04:00,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285907075] [2023-09-01 14:04:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:04:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:04:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:04:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:00,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:04:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285907075] [2023-09-01 14:04:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285907075] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:04:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044244814] [2023-09-01 14:04:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:04:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:04:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:04:00,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:04:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:04:00,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:04:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:04:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 14:04:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:04:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:04:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:04:26,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044244814] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:04:26,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:04:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-09-01 14:04:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121273634] [2023-09-01 14:04:26,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:04:26,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:04:26,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:04:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:04:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:04:27,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:04:27,272 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) [2023-09-01 14:04:27,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:04:27,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:04:27,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:04:33,384 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 [] [2023-09-01 14:04:34,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:04:38,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:04:48,036 WARN L222 SmtUtils]: Spent 6.71s 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) [2023-09-01 14:04:52,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:04:59,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:05:01,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:05:02,686 INFO L130 PetriNetUnfolder]: 1454/2913 cut-off events. [2023-09-01 14:05:02,686 INFO L131 PetriNetUnfolder]: For 156447/156447 co-relation queries the response was YES. [2023-09-01 14:05:02,700 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. [2023-09-01 14:05:02,712 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 226 selfloop transitions, 354 changer transitions 5/585 dead transitions. [2023-09-01 14:05:02,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 585 transitions, 12727 flow [2023-09-01 14:05:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:05:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:05:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1717 transitions. [2023-09-01 14:05:02,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431841046277666 [2023-09-01 14:05:02,715 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1717 transitions. [2023-09-01 14:05:02,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1717 transitions. [2023-09-01 14:05:02,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:02,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1717 transitions. [2023-09-01 14:05:02,717 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) [2023-09-01 14:05:02,720 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) [2023-09-01 14:05:02,720 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) [2023-09-01 14:05:02,720 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 28 states and 1717 transitions. [2023-09-01 14:05:02,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 585 transitions, 12727 flow [2023-09-01 14:05:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 585 transitions, 11933 flow, removed 260 selfloop flow, removed 14 redundant places. [2023-09-01 14:05:03,195 INFO L231 Difference]: Finished difference. Result has 261 places, 499 transitions, 11436 flow [2023-09-01 14:05:03,195 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} [2023-09-01 14:05:03,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 241 predicate places. [2023-09-01 14:05:03,195 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 499 transitions, 11436 flow [2023-09-01 14:05:03,196 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) [2023-09-01 14:05:03,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:03,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:03,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:03,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:05:03,400 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:03,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-09-01 14:05:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113071007] [2023-09-01 14:05:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:03,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113071007] [2023-09-01 14:05:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113071007] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338939598] [2023-09-01 14:05:03,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:05:03,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:03,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:03,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:05:03,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:05:03,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:03,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:05:03,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338939598] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:28,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:28,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-09-01 14:05:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703674521] [2023-09-01 14:05:28,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:28,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:05:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:05:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:05:30,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:05:30,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:05:30,477 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) [2023-09-01 14:05:30,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:30,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:05:30,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:34,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 14:05:40,973 INFO L130 PetriNetUnfolder]: 1768/3647 cut-off events. [2023-09-01 14:05:40,973 INFO L131 PetriNetUnfolder]: For 204481/204481 co-relation queries the response was YES. [2023-09-01 14:05:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39652 conditions, 3647 events. 1768/3647 cut-off events. For 204481/204481 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27413 event pairs, 48 based on Foata normal form. 54/3701 useless extension candidates. Maximal degree in co-relation 38686. Up to 1013 conditions per place. [2023-09-01 14:05:41,007 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 259 selfloop transitions, 424 changer transitions 7/690 dead transitions. [2023-09-01 14:05:41,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 690 transitions, 17554 flow [2023-09-01 14:05:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:05:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:05:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1219 transitions. [2023-09-01 14:05:41,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45181616011860637 [2023-09-01 14:05:41,010 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1219 transitions. [2023-09-01 14:05:41,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1219 transitions. [2023-09-01 14:05:41,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:41,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1219 transitions. [2023-09-01 14:05:41,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:05:41,014 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) [2023-09-01 14:05:41,014 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) [2023-09-01 14:05:41,014 INFO L175 Difference]: Start difference. First operand has 261 places, 499 transitions, 11436 flow. Second operand 19 states and 1219 transitions. [2023-09-01 14:05:41,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 690 transitions, 17554 flow [2023-09-01 14:05:42,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 690 transitions, 15373 flow, removed 1031 selfloop flow, removed 20 redundant places. [2023-09-01 14:05:42,185 INFO L231 Difference]: Finished difference. Result has 267 places, 610 transitions, 14745 flow [2023-09-01 14:05:42,185 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=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14745, PETRI_PLACES=267, PETRI_TRANSITIONS=610} [2023-09-01 14:05:42,186 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 247 predicate places. [2023-09-01 14:05:42,186 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 610 transitions, 14745 flow [2023-09-01 14:05:42,186 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) [2023-09-01 14:05:42,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:42,186 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:42,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:05:42,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:05:42,387 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:42,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-09-01 14:05:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:42,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146773263] [2023-09-01 14:05:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:42,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:42,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146773263] [2023-09-01 14:05:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146773263] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388220897] [2023-09-01 14:05:42,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:05:42,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:42,654 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:42,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:05:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:05:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:42,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:43,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388220897] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:43,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:43,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 14:05:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152231959] [2023-09-01 14:05:43,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:43,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:05:43,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:05:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:05:43,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:05:43,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 610 transitions, 14745 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) [2023-09-01 14:05:43,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:43,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:05:43,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:46,149 INFO L130 PetriNetUnfolder]: 3259/6776 cut-off events. [2023-09-01 14:05:46,149 INFO L131 PetriNetUnfolder]: For 278623/278623 co-relation queries the response was YES. [2023-09-01 14:05:46,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71292 conditions, 6776 events. 3259/6776 cut-off events. For 278623/278623 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 57666 event pairs, 378 based on Foata normal form. 72/6848 useless extension candidates. Maximal degree in co-relation 69460. Up to 2749 conditions per place. [2023-09-01 14:05:46,209 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 931 selfloop transitions, 371 changer transitions 26/1328 dead transitions. [2023-09-01 14:05:46,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1328 transitions, 33983 flow [2023-09-01 14:05:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 14:05:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 14:05:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2119 transitions. [2023-09-01 14:05:46,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388980944490472 [2023-09-01 14:05:46,212 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2119 transitions. [2023-09-01 14:05:46,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2119 transitions. [2023-09-01 14:05:46,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:46,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2119 transitions. [2023-09-01 14:05:46,215 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) [2023-09-01 14:05:46,218 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) [2023-09-01 14:05:46,219 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) [2023-09-01 14:05:46,219 INFO L175 Difference]: Start difference. First operand has 267 places, 610 transitions, 14745 flow. Second operand 34 states and 2119 transitions. [2023-09-01 14:05:46,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1328 transitions, 33983 flow [2023-09-01 14:05:48,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1328 transitions, 31254 flow, removed 1137 selfloop flow, removed 11 redundant places. [2023-09-01 14:05:48,683 INFO L231 Difference]: Finished difference. Result has 304 places, 846 transitions, 20523 flow [2023-09-01 14:05:48,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=13599, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20523, PETRI_PLACES=304, PETRI_TRANSITIONS=846} [2023-09-01 14:05:48,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 284 predicate places. [2023-09-01 14:05:48,684 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 846 transitions, 20523 flow [2023-09-01 14:05:48,684 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) [2023-09-01 14:05:48,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:48,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:48,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 14:05:48,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:48,885 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:48,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:48,885 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 14 times [2023-09-01 14:05:48,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:48,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653311566] [2023-09-01 14:05:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:48,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653311566] [2023-09-01 14:05:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653311566] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657267273] [2023-09-01 14:05:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:05:49,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:49,114 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:05:49,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:05:49,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:05:49,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:49,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657267273] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:49,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:49,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 14:05:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765433417] [2023-09-01 14:05:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:05:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:05:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:05:49,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:05:49,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 846 transitions, 20523 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) [2023-09-01 14:05:49,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:49,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:05:49,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:05:54,614 INFO L130 PetriNetUnfolder]: 3862/8133 cut-off events. [2023-09-01 14:05:54,614 INFO L131 PetriNetUnfolder]: For 363375/363375 co-relation queries the response was YES. [2023-09-01 14:05:54,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87636 conditions, 8133 events. 3862/8133 cut-off events. For 363375/363375 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 72113 event pairs, 373 based on Foata normal form. 118/8251 useless extension candidates. Maximal degree in co-relation 86074. Up to 1693 conditions per place. [2023-09-01 14:05:54,686 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 659 selfloop transitions, 874 changer transitions 46/1579 dead transitions. [2023-09-01 14:05:54,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1579 transitions, 41254 flow [2023-09-01 14:05:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 14:05:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 14:05:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3196 transitions. [2023-09-01 14:05:54,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43282773564463706 [2023-09-01 14:05:54,692 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3196 transitions. [2023-09-01 14:05:54,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3196 transitions. [2023-09-01 14:05:54,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:05:54,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3196 transitions. [2023-09-01 14:05:54,696 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) [2023-09-01 14:05:54,701 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) [2023-09-01 14:05:54,701 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) [2023-09-01 14:05:54,701 INFO L175 Difference]: Start difference. First operand has 304 places, 846 transitions, 20523 flow. Second operand 52 states and 3196 transitions. [2023-09-01 14:05:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1579 transitions, 41254 flow [2023-09-01 14:05:58,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1579 transitions, 40017 flow, removed 574 selfloop flow, removed 8 redundant places. [2023-09-01 14:05:58,343 INFO L231 Difference]: Finished difference. Result has 363 places, 1196 transitions, 32967 flow [2023-09-01 14:05:58,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=18827, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=32967, PETRI_PLACES=363, PETRI_TRANSITIONS=1196} [2023-09-01 14:05:58,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 343 predicate places. [2023-09-01 14:05:58,344 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1196 transitions, 32967 flow [2023-09-01 14:05:58,344 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) [2023-09-01 14:05:58,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:05:58,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:05:58,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 14:05:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:05:58,549 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:05:58,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:05:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash 604358229, now seen corresponding path program 15 times [2023-09-01 14:05:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:05:58,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350645318] [2023-09-01 14:05:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:05:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:05:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:05:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:05:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350645318] [2023-09-01 14:05:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350645318] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:05:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160169543] [2023-09-01 14:05:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:05:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:05:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:05:58,797 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:05:58,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:05:58,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:05:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:05:58,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:05:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:05:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:59,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:05:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:05:59,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160169543] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:05:59,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:05:59,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:05:59,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101053332] [2023-09-01 14:05:59,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:05:59,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:05:59,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:05:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:05:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:05:59,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:05:59,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1196 transitions, 32967 flow. Second operand has 23 states, 23 states have (on average 59.78260869565217) internal successors, (1375), 23 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:05:59,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:05:59,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:05:59,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:05,292 INFO L130 PetriNetUnfolder]: 4170/8627 cut-off events. [2023-09-01 14:06:05,293 INFO L131 PetriNetUnfolder]: For 460959/460959 co-relation queries the response was YES. [2023-09-01 14:06:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99214 conditions, 8627 events. 4170/8627 cut-off events. For 460959/460959 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 76222 event pairs, 280 based on Foata normal form. 214/8841 useless extension candidates. Maximal degree in co-relation 97733. Up to 2428 conditions per place. [2023-09-01 14:06:05,377 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 655 selfloop transitions, 890 changer transitions 8/1553 dead transitions. [2023-09-01 14:06:05,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1553 transitions, 43790 flow [2023-09-01 14:06:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 14:06:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 14:06:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2924 transitions. [2023-09-01 14:06:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44764237599510104 [2023-09-01 14:06:05,380 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2924 transitions. [2023-09-01 14:06:05,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2924 transitions. [2023-09-01 14:06:05,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:05,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2924 transitions. [2023-09-01 14:06:05,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 63.56521739130435) internal successors, (2924), 46 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:05,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 142.0) internal successors, (6674), 47 states have internal predecessors, (6674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:05,388 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 142.0) internal successors, (6674), 47 states have internal predecessors, (6674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:05,388 INFO L175 Difference]: Start difference. First operand has 363 places, 1196 transitions, 32967 flow. Second operand 46 states and 2924 transitions. [2023-09-01 14:06:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1553 transitions, 43790 flow [2023-09-01 14:06:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1553 transitions, 39670 flow, removed 2029 selfloop flow, removed 13 redundant places. [2023-09-01 14:06:10,521 INFO L231 Difference]: Finished difference. Result has 401 places, 1381 transitions, 37663 flow [2023-09-01 14:06:10,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=30009, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=37663, PETRI_PLACES=401, PETRI_TRANSITIONS=1381} [2023-09-01 14:06:10,523 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 381 predicate places. [2023-09-01 14:06:10,523 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1381 transitions, 37663 flow [2023-09-01 14:06:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.78260869565217) internal successors, (1375), 23 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:10,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:10,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:10,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:06:10,728 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:10,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1409095033, now seen corresponding path program 16 times [2023-09-01 14:06:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360702167] [2023-09-01 14:06:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:10,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:10,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360702167] [2023-09-01 14:06:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360702167] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:10,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900318049] [2023-09-01 14:06:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:06:10,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:10,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:10,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:10,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:06:11,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:06:11,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:11,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:06:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:11,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900318049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:11,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:11,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:06:11,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858354367] [2023-09-01 14:06:11,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:11,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:06:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:06:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:06:12,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:06:12,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1381 transitions, 37663 flow. Second operand has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:12,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:12,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:06:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:18,658 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 [] [2023-09-01 14:06:31,543 INFO L130 PetriNetUnfolder]: 5216/10848 cut-off events. [2023-09-01 14:06:31,543 INFO L131 PetriNetUnfolder]: For 597875/597875 co-relation queries the response was YES. [2023-09-01 14:06:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124225 conditions, 10848 events. 5216/10848 cut-off events. For 597875/597875 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 100053 event pairs, 166 based on Foata normal form. 102/10950 useless extension candidates. Maximal degree in co-relation 121794. Up to 2245 conditions per place. [2023-09-01 14:06:31,654 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 872 selfloop transitions, 1259 changer transitions 8/2139 dead transitions. [2023-09-01 14:06:31,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 2139 transitions, 59202 flow [2023-09-01 14:06:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-09-01 14:06:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-09-01 14:06:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4233 transitions. [2023-09-01 14:06:31,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320269442743417 [2023-09-01 14:06:31,658 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4233 transitions. [2023-09-01 14:06:31,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4233 transitions. [2023-09-01 14:06:31,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:31,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4233 transitions. [2023-09-01 14:06:31,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 61.34782608695652) internal successors, (4233), 69 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:31,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:31,669 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:31,669 INFO L175 Difference]: Start difference. First operand has 401 places, 1381 transitions, 37663 flow. Second operand 69 states and 4233 transitions. [2023-09-01 14:06:31,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 2139 transitions, 59202 flow [2023-09-01 14:06:39,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2139 transitions, 57270 flow, removed 839 selfloop flow, removed 12 redundant places. [2023-09-01 14:06:39,843 INFO L231 Difference]: Finished difference. Result has 476 places, 1795 transitions, 52755 flow [2023-09-01 14:06:39,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=36225, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=857, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=52755, PETRI_PLACES=476, PETRI_TRANSITIONS=1795} [2023-09-01 14:06:39,844 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-09-01 14:06:39,845 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1795 transitions, 52755 flow [2023-09-01 14:06:39,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.78260869565217) internal successors, (1329), 23 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:06:39,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:06:39,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:06:39,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 14:06:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:40,045 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:06:40,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:06:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 17 times [2023-09-01 14:06:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:06:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713198605] [2023-09-01 14:06:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:06:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:06:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:06:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:40,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:06:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713198605] [2023-09-01 14:06:40,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713198605] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:06:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129175622] [2023-09-01 14:06:40,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:06:40,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:06:40,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:06:40,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:06:40,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:06:40,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:06:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:06:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:06:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:06:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:40,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:06:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:06:42,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129175622] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:06:42,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:06:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-09-01 14:06:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296039268] [2023-09-01 14:06:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:06:42,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:06:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:06:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:06:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:06:43,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:06:43,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1795 transitions, 52755 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) [2023-09-01 14:06:43,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:06:43,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:06:43,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:06:52,786 INFO L130 PetriNetUnfolder]: 6004/12476 cut-off events. [2023-09-01 14:06:52,786 INFO L131 PetriNetUnfolder]: For 890854/890854 co-relation queries the response was YES. [2023-09-01 14:06:52,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153486 conditions, 12476 events. 6004/12476 cut-off events. For 890854/890854 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 117873 event pairs, 298 based on Foata normal form. 118/12594 useless extension candidates. Maximal degree in co-relation 151732. Up to 2925 conditions per place. [2023-09-01 14:06:52,929 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 744 selfloop transitions, 1497 changer transitions 27/2268 dead transitions. [2023-09-01 14:06:52,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 2268 transitions, 69504 flow [2023-09-01 14:06:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 14:06:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 14:06:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2908 transitions. [2023-09-01 14:06:52,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43572070722205575 [2023-09-01 14:06:52,932 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2908 transitions. [2023-09-01 14:06:52,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2908 transitions. [2023-09-01 14:06:52,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:06:52,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2908 transitions. [2023-09-01 14:06:52,935 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) [2023-09-01 14:06:52,939 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) [2023-09-01 14:06:52,940 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) [2023-09-01 14:06:52,940 INFO L175 Difference]: Start difference. First operand has 476 places, 1795 transitions, 52755 flow. Second operand 47 states and 2908 transitions. [2023-09-01 14:06:52,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 2268 transitions, 69504 flow [2023-09-01 14:07:04,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 2268 transitions, 67684 flow, removed 749 selfloop flow, removed 32 redundant places. [2023-09-01 14:07:04,916 INFO L231 Difference]: Finished difference. Result has 507 places, 2060 transitions, 65036 flow [2023-09-01 14:07:04,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=51136, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=65036, PETRI_PLACES=507, PETRI_TRANSITIONS=2060} [2023-09-01 14:07:04,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 487 predicate places. [2023-09-01 14:07:04,918 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 2060 transitions, 65036 flow [2023-09-01 14:07:04,919 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) [2023-09-01 14:07:04,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:04,919 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:04,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:05,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:05,124 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:05,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 18 times [2023-09-01 14:07:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:05,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447684138] [2023-09-01 14:07:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:05,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447684138] [2023-09-01 14:07:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447684138] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560348481] [2023-09-01 14:07:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:07:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:05,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:05,304 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:05,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:07:05,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:07:05,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:07:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560348481] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:06,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:06,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 14:07:06,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178227862] [2023-09-01 14:07:06,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:07:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:07:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:07:08,292 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 [] [2023-09-01 14:07:08,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:07:08,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 2060 transitions, 65036 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:08,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:08,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:07:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:21,331 INFO L130 PetriNetUnfolder]: 6393/13219 cut-off events. [2023-09-01 14:07:21,331 INFO L131 PetriNetUnfolder]: For 1034360/1034360 co-relation queries the response was YES. [2023-09-01 14:07:21,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173259 conditions, 13219 events. 6393/13219 cut-off events. For 1034360/1034360 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 125658 event pairs, 207 based on Foata normal form. 252/13471 useless extension candidates. Maximal degree in co-relation 172163. Up to 5285 conditions per place. [2023-09-01 14:07:21,522 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 925 selfloop transitions, 1463 changer transitions 24/2412 dead transitions. [2023-09-01 14:07:21,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 2412 transitions, 79131 flow [2023-09-01 14:07:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 14:07:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 14:07:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2710 transitions. [2023-09-01 14:07:21,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44382574516868656 [2023-09-01 14:07:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2710 transitions. [2023-09-01 14:07:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2710 transitions. [2023-09-01 14:07:21,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:21,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2710 transitions. [2023-09-01 14:07:21,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 63.02325581395349) internal successors, (2710), 43 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:21,532 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) [2023-09-01 14:07:21,533 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) [2023-09-01 14:07:21,533 INFO L175 Difference]: Start difference. First operand has 507 places, 2060 transitions, 65036 flow. Second operand 43 states and 2710 transitions. [2023-09-01 14:07:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 2412 transitions, 79131 flow [2023-09-01 14:07:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2412 transitions, 75112 flow, removed 1905 selfloop flow, removed 18 redundant places. [2023-09-01 14:07:40,141 INFO L231 Difference]: Finished difference. Result has 540 places, 2211 transitions, 71047 flow [2023-09-01 14:07:40,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=61209, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=71047, PETRI_PLACES=540, PETRI_TRANSITIONS=2211} [2023-09-01 14:07:40,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-09-01 14:07:40,143 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2211 transitions, 71047 flow [2023-09-01 14:07:40,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:40,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:40,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:40,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:40,349 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:07:40,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1584397281, now seen corresponding path program 19 times [2023-09-01 14:07:40,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:40,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061857081] [2023-09-01 14:07:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:40,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061857081] [2023-09-01 14:07:40,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061857081] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:40,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390618010] [2023-09-01 14:07:40,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:07:40,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:40,584 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:07:40,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:07:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:07:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:40,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:07:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390618010] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:41,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-09-01 14:07:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861571293] [2023-09-01 14:07:41,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:07:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:07:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:07:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:07:41,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2211 transitions, 71047 flow. Second operand has 24 states, 24 states have (on average 57.625) internal successors, (1383), 24 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:41,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:41,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:07:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:53,794 INFO L130 PetriNetUnfolder]: 6808/13976 cut-off events. [2023-09-01 14:07:53,794 INFO L131 PetriNetUnfolder]: For 1024788/1024788 co-relation queries the response was YES. [2023-09-01 14:07:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181855 conditions, 13976 events. 6808/13976 cut-off events. For 1024788/1024788 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 133043 event pairs, 917 based on Foata normal form. 98/14074 useless extension candidates. Maximal degree in co-relation 180733. Up to 10382 conditions per place. [2023-09-01 14:07:54,063 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 2074 selfloop transitions, 499 changer transitions 14/2587 dead transitions. [2023-09-01 14:07:54,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2587 transitions, 84488 flow [2023-09-01 14:07:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 14:07:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 14:07:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3146 transitions. [2023-09-01 14:07:54,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344103838718586 [2023-09-01 14:07:54,066 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3146 transitions. [2023-09-01 14:07:54,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3146 transitions. [2023-09-01 14:07:54,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:54,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3146 transitions. [2023-09-01 14:07:54,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.68627450980392) internal successors, (3146), 51 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:54,073 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) [2023-09-01 14:07:54,073 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) [2023-09-01 14:07:54,073 INFO L175 Difference]: Start difference. First operand has 540 places, 2211 transitions, 71047 flow. Second operand 51 states and 3146 transitions. [2023-09-01 14:07:54,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2587 transitions, 84488 flow [2023-09-01 14:08:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 2587 transitions, 83580 flow, removed 384 selfloop flow, removed 24 redundant places. [2023-09-01 14:08:13,915 INFO L231 Difference]: Finished difference. Result has 582 places, 2331 transitions, 75860 flow [2023-09-01 14:08:13,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=70061, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=75860, PETRI_PLACES=582, PETRI_TRANSITIONS=2331} [2023-09-01 14:08:13,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-09-01 14:08:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2331 transitions, 75860 flow [2023-09-01 14:08:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.625) internal successors, (1383), 24 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:08:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:08:13,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 14:08:14,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 14:08:14,118 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:08:14,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:08:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1462861319, now seen corresponding path program 20 times [2023-09-01 14:08:14,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:08:14,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222228249] [2023-09-01 14:08:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:08:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:08:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222228249] [2023-09-01 14:08:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222228249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:08:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174916100] [2023-09-01 14:08:14,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:08:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:08:14,322 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:08:14,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:08:14,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:08:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:08:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:08:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:08:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:14,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174916100] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:08:14,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:08:14,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 14:08:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454062825] [2023-09-01 14:08:14,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:08:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:08:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:08:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:08:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:08:15,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-09-01 14:08:15,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2331 transitions, 75860 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) [2023-09-01 14:08:15,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:08:15,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-09-01 14:08:15,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:08:28,199 INFO L130 PetriNetUnfolder]: 6915/14162 cut-off events. [2023-09-01 14:08:28,199 INFO L131 PetriNetUnfolder]: For 1116609/1116609 co-relation queries the response was YES. [2023-09-01 14:08:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187960 conditions, 14162 events. 6915/14162 cut-off events. For 1116609/1116609 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 134774 event pairs, 397 based on Foata normal form. 40/14202 useless extension candidates. Maximal degree in co-relation 186781. Up to 5324 conditions per place. [2023-09-01 14:08:28,450 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1155 selfloop transitions, 1336 changer transitions 19/2510 dead transitions. [2023-09-01 14:08:28,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2510 transitions, 83987 flow [2023-09-01 14:08:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:08:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:08:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2524 transitions. [2023-09-01 14:08:28,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4443661971830986 [2023-09-01 14:08:28,452 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2524 transitions. [2023-09-01 14:08:28,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2524 transitions. [2023-09-01 14:08:28,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:08:28,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2524 transitions. [2023-09-01 14:08:28,455 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) [2023-09-01 14:08:28,457 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) [2023-09-01 14:08:28,458 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) [2023-09-01 14:08:28,458 INFO L175 Difference]: Start difference. First operand has 582 places, 2331 transitions, 75860 flow. Second operand 40 states and 2524 transitions. [2023-09-01 14:08:28,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2510 transitions, 83987 flow [2023-09-01 14:08:49,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2510 transitions, 83154 flow, removed 315 selfloop flow, removed 22 redundant places. [2023-09-01 14:08:49,598 INFO L231 Difference]: Finished difference. Result has 604 places, 2374 transitions, 80355 flow [2023-09-01 14:08:49,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=75037, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=80355, PETRI_PLACES=604, PETRI_TRANSITIONS=2374} [2023-09-01 14:08:49,599 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 584 predicate places. [2023-09-01 14:08:49,599 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 2374 transitions, 80355 flow [2023-09-01 14:08:49,600 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) [2023-09-01 14:08:49,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:08:49,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:08:49,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:08:49,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 14:08:49,800 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:08:49,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:08:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 711617715, now seen corresponding path program 21 times [2023-09-01 14:08:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:08:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724566539] [2023-09-01 14:08:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:49,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:08:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:49,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:08:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724566539] [2023-09-01 14:08:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724566539] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:08:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093112446] [2023-09-01 14:08:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:08:49,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:08:49,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:08:49,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:08:50,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:08:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:08:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:08:50,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:08:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:50,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093112446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:08:50,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:08:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-09-01 14:08:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549580881] [2023-09-01 14:08:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:08:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:08:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:08:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:08:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:08:50,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 14:08:50,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 2374 transitions, 80355 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) [2023-09-01 14:08:50,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:08:50,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 14:08:50,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:09:02,160 INFO L130 PetriNetUnfolder]: 6933/14184 cut-off events. [2023-09-01 14:09:02,161 INFO L131 PetriNetUnfolder]: For 1205715/1205715 co-relation queries the response was YES. [2023-09-01 14:09:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193988 conditions, 14184 events. 6933/14184 cut-off events. For 1205715/1205715 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 134788 event pairs, 807 based on Foata normal form. 24/14208 useless extension candidates. Maximal degree in co-relation 193799. Up to 4696 conditions per place. [2023-09-01 14:09:02,354 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 1154 selfloop transitions, 1295 changer transitions 5/2454 dead transitions. [2023-09-01 14:09:02,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 2454 transitions, 86771 flow [2023-09-01 14:09:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:09:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:09:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1575 transitions. [2023-09-01 14:09:02,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42659804983748645 [2023-09-01 14:09:02,356 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1575 transitions. [2023-09-01 14:09:02,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1575 transitions. [2023-09-01 14:09:02,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:09:02,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1575 transitions. [2023-09-01 14:09:02,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.57692307692308) internal successors, (1575), 26 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:02,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:02,359 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:02,360 INFO L175 Difference]: Start difference. First operand has 604 places, 2374 transitions, 80355 flow. Second operand 26 states and 1575 transitions. [2023-09-01 14:09:02,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 2454 transitions, 86771 flow [2023-09-01 14:09:26,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 2454 transitions, 86268 flow, removed 174 selfloop flow, removed 21 redundant places. [2023-09-01 14:09:26,981 INFO L231 Difference]: Finished difference. Result has 608 places, 2357 transitions, 82288 flow [2023-09-01 14:09:26,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=79257, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=82288, PETRI_PLACES=608, PETRI_TRANSITIONS=2357} [2023-09-01 14:09:26,982 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 588 predicate places. [2023-09-01 14:09:26,982 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 2357 transitions, 82288 flow [2023-09-01 14:09:26,983 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) [2023-09-01 14:09:26,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:09:26,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:09:26,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 14:09:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:09:27,187 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:09:27,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:09:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 754986893, now seen corresponding path program 22 times [2023-09-01 14:09:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:09:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965466759] [2023-09-01 14:09:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:09:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:09:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:09:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:09:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965466759] [2023-09-01 14:09:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965466759] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:09:27,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056099583] [2023-09-01 14:09:27,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:09:27,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:09:27,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:09:27,377 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:09:27,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:09:27,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:09:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:09:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:09:27,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:09:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:09:27,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:09:45,760 WARN L222 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 1128 DAG size of output: 1080 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15