./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.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-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --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 14:07:08,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:07:08,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:07:09,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:07:09,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:07:09,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:07:09,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:07:09,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:07:09,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:07:09,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:07:09,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:07:09,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:07:09,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:07:09,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:07:09,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:07:09,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:07:09,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:07:09,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:07:09,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:07:09,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:07:09,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:07:09,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:07:09,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:07:09,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:07:09,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:07:09,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:07:09,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:07:09,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:07:09,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:07:09,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:07:09,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:07:09,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:07:09,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:07:09,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:07:09,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:07:09,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:07:09,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:07:09,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:07:09,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:07:09,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:07:09,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:07:09,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:07:09,071 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:07:09,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:07:09,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:07:09,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:07:09,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:07:09,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:07:09,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:07:09,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:07:09,074 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:07:09,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:07:09,074 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:07:09,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:07:09,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:07:09,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:07:09,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:07:09,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:07:09,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:07:09,075 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:07:09,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:07:09,076 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:07:09,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:07:09,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:07:09,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:07:09,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:07:09,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:07:09,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:07:09,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:07:09,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:07:09,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:07:09,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:07:09,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:07:09,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:07:09,078 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:07:09,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:07:09,079 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:07:09,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:07:09,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:07:09,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:07:09,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:07:09,407 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:07:09,407 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:07:09,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 14:07:10,605 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:07:10,813 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:07:10,813 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 14:07:10,819 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63dbd78e/603e5fc926f748bda465056c77a6eddc/FLAG94621370c [2023-09-01 14:07:10,829 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63dbd78e/603e5fc926f748bda465056c77a6eddc [2023-09-01 14:07:10,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:07:10,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:07:10,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:07:10,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:07:10,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:07:10,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:07:10" (1/1) ... [2023-09-01 14:07:10,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377d48e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:10, skipping insertion in model container [2023-09-01 14:07:10,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:07:10" (1/1) ... [2023-09-01 14:07:10,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:07:10,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:07:11,062 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-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 14:07:11,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:07:11,082 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:07:11,119 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-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 14:07:11,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:07:11,137 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:07:11,142 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:07:11,147 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:07:11,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11 WrapperNode [2023-09-01 14:07:11,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:07:11,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:07:11,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:07:11,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:07:11,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,212 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2023-09-01 14:07:11,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:07:11,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:07:11,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:07:11,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:07:11,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,258 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:07:11,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:07:11,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:07:11,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:07:11,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (1/1) ... [2023-09-01 14:07:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:07:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:11,306 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 14:07:11,327 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 14:07:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:07:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:07:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:07:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:07:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:07:11,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:07:11,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:07:11,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:07:11,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:07:11,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:07:11,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:07:11,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:07:11,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:07:11,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:07:11,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:07:11,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:07:11,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:07:11,349 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 14:07:11,462 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:07:11,464 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:07:11,894 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:07:11,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:07:12,001 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 14:07:12,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:07:12 BoogieIcfgContainer [2023-09-01 14:07:12,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:07:12,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:07:12,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:07:12,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:07:12,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:07:10" (1/3) ... [2023-09-01 14:07:12,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20604e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:07:12, skipping insertion in model container [2023-09-01 14:07:12,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:07:11" (2/3) ... [2023-09-01 14:07:12,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20604e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:07:12, skipping insertion in model container [2023-09-01 14:07:12,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:07:12" (3/3) ... [2023-09-01 14:07:12,010 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-09-01 14:07:12,017 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:07:12,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:07:12,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:07:12,025 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:07:12,104 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 14:07:12,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 214 transitions, 452 flow [2023-09-01 14:07:12,237 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-09-01 14:07:12,237 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:07:12,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 211 events. 18/211 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 128 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-09-01 14:07:12,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 214 transitions, 452 flow [2023-09-01 14:07:12,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 201 transitions, 420 flow [2023-09-01 14:07:12,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:07:12,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 201 transitions, 420 flow [2023-09-01 14:07:12,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 201 transitions, 420 flow [2023-09-01 14:07:12,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 420 flow [2023-09-01 14:07:12,318 INFO L130 PetriNetUnfolder]: 18/201 cut-off events. [2023-09-01 14:07:12,318 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:07:12,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-09-01 14:07:12,320 INFO L119 LiptonReduction]: Number of co-enabled transitions 1880 [2023-09-01 14:07:19,199 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-09-01 14:07:19,200 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-09-01 14:07:19,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:07:19,214 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;@41ab49a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:07:19,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 14:07:19,220 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-09-01 14:07:19,220 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:07:19,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:19,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:19,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:19,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2034446607, now seen corresponding path program 1 times [2023-09-01 14:07:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:19,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458414797] [2023-09-01 14:07:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:19,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:19,452 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 14:07:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:19,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458414797] [2023-09-01 14:07:19,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458414797] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:19,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:07:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622094538] [2023-09-01 14:07:19,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 14:07:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 14:07:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 14:07:19,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 422 [2023-09-01 14:07:19,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:19,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:19,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 422 [2023-09-01 14:07:19,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:19,587 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2023-09-01 14:07:19,588 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-09-01 14:07:19,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1341 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-09-01 14:07:19,592 INFO L137 encePairwiseOnDemand]: 421/422 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-09-01 14:07:19,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-09-01 14:07:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 14:07:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 14:07:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 405 transitions. [2023-09-01 14:07:19,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985781990521326 [2023-09-01 14:07:19,605 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 405 transitions. [2023-09-01 14:07:19,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 405 transitions. [2023-09-01 14:07:19,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:19,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 405 transitions. [2023-09-01 14:07:19,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:19,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:19,616 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:19,618 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 405 transitions. [2023-09-01 14:07:19,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-09-01 14:07:19,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 14:07:19,622 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-09-01 14:07:19,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-09-01 14:07:19,626 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-09-01 14:07:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-09-01 14:07:19,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:19,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:19,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:07:19,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:19,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -192981207, now seen corresponding path program 1 times [2023-09-01 14:07:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833974421] [2023-09-01 14:07:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:19,963 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 14:07:19,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:19,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833974421] [2023-09-01 14:07:19,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833974421] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:19,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:19,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:07:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224718813] [2023-09-01 14:07:19,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:07:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:07:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:07:20,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2023-09-01 14:07:20,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:20,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2023-09-01 14:07:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:20,157 INFO L130 PetriNetUnfolder]: 354/534 cut-off events. [2023-09-01 14:07:20,157 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 14:07:20,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 534 events. 354/534 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1723 event pairs, 212 based on Foata normal form. 52/442 useless extension candidates. Maximal degree in co-relation 1089. Up to 460 conditions per place. [2023-09-01 14:07:20,175 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 25 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-09-01 14:07:20,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 222 flow [2023-09-01 14:07:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:07:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:07:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 953 transitions. [2023-09-01 14:07:20,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45165876777251185 [2023-09-01 14:07:20,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 953 transitions. [2023-09-01 14:07:20,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 953 transitions. [2023-09-01 14:07:20,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:20,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 953 transitions. [2023-09-01 14:07:20,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,189 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 953 transitions. [2023-09-01 14:07:20,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 222 flow [2023-09-01 14:07:20,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:07:20,191 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2023-09-01 14:07:20,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-09-01 14:07:20,192 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 14:07:20,192 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2023-09-01 14:07:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:20,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:07:20,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:20,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash -122480723, now seen corresponding path program 1 times [2023-09-01 14:07:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:20,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151380404] [2023-09-01 14:07:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:20,386 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 14:07:20,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151380404] [2023-09-01 14:07:20,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151380404] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:20,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:20,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:07:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386105706] [2023-09-01 14:07:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:07:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:07:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:07:20,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2023-09-01 14:07:20,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:20,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2023-09-01 14:07:20,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:20,583 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2023-09-01 14:07:20,584 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2023-09-01 14:07:20,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 664 events. 452/664 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2352 event pairs, 280 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1890. Up to 461 conditions per place. [2023-09-01 14:07:20,588 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-09-01 14:07:20,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2023-09-01 14:07:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:07:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:07:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2023-09-01 14:07:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45082938388625593 [2023-09-01 14:07:20,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2023-09-01 14:07:20,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2023-09-01 14:07:20,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:20,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2023-09-01 14:07:20,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,597 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 761 transitions. [2023-09-01 14:07:20,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2023-09-01 14:07:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 14:07:20,600 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-09-01 14:07:20,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-09-01 14:07:20,601 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-09-01 14:07:20,604 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-09-01 14:07:20,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:20,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:20,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:20,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:07:20,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:20,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1322683899, now seen corresponding path program 1 times [2023-09-01 14:07:20,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:20,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723940925] [2023-09-01 14:07:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:20,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:21,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:21,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723940925] [2023-09-01 14:07:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723940925] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:21,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:21,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 14:07:21,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772408021] [2023-09-01 14:07:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:07:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:07:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:07:21,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-09-01 14:07:21,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:21,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:21,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-09-01 14:07:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:22,261 INFO L130 PetriNetUnfolder]: 594/862 cut-off events. [2023-09-01 14:07:22,261 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2023-09-01 14:07:22,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2894 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2023-09-01 14:07:22,267 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-09-01 14:07:22,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2023-09-01 14:07:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:07:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:07:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1658 transitions. [2023-09-01 14:07:22,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365455502896261 [2023-09-01 14:07:22,275 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1658 transitions. [2023-09-01 14:07:22,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1658 transitions. [2023-09-01 14:07:22,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:22,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1658 transitions. [2023-09-01 14:07:22,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.22222222222223) internal successors, (1658), 9 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,287 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1658 transitions. [2023-09-01 14:07:22,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2023-09-01 14:07:22,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:07:22,291 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2023-09-01 14:07:22,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-09-01 14:07:22,292 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-09-01 14:07:22,293 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2023-09-01 14:07:22,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:22,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:22,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:07:22,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:22,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1126960381, now seen corresponding path program 2 times [2023-09-01 14:07:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:22,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402006614] [2023-09-01 14:07:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:22,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:22,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402006614] [2023-09-01 14:07:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402006614] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:22,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:07:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403542950] [2023-09-01 14:07:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:07:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:07:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:07:22,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-09-01 14:07:22,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:22,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-09-01 14:07:22,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:22,586 INFO L130 PetriNetUnfolder]: 485/716 cut-off events. [2023-09-01 14:07:22,586 INFO L131 PetriNetUnfolder]: For 453/466 co-relation queries the response was YES. [2023-09-01 14:07:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 453/466 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2231 event pairs, 107 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2023-09-01 14:07:22,591 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-09-01 14:07:22,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2023-09-01 14:07:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:07:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:07:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-09-01 14:07:22,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684044233807267 [2023-09-01 14:07:22,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-09-01 14:07:22,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-09-01 14:07:22,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:22,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-09-01 14:07:22,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,600 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 593 transitions. [2023-09-01 14:07:22,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2023-09-01 14:07:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-09-01 14:07:22,607 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2023-09-01 14:07:22,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-09-01 14:07:22,609 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-09-01 14:07:22,609 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2023-09-01 14:07:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:22,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:22,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:22,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:07:22,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:22,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 247356795, now seen corresponding path program 3 times [2023-09-01 14:07:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827071779] [2023-09-01 14:07:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:23,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827071779] [2023-09-01 14:07:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827071779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:23,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:23,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 14:07:23,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422023638] [2023-09-01 14:07:23,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:23,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:07:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:07:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:07:23,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2023-09-01 14:07:23,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:23,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:23,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2023-09-01 14:07:23,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:23,816 INFO L130 PetriNetUnfolder]: 604/893 cut-off events. [2023-09-01 14:07:23,816 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-09-01 14:07:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 893 events. 604/893 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2922 event pairs, 123 based on Foata normal form. 1/692 useless extension candidates. Maximal degree in co-relation 2897. Up to 754 conditions per place. [2023-09-01 14:07:23,822 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 70 selfloop transitions, 26 changer transitions 3/99 dead transitions. [2023-09-01 14:07:23,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 606 flow [2023-09-01 14:07:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:07:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:07:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2023-09-01 14:07:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283833596629805 [2023-09-01 14:07:23,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2023-09-01 14:07:23,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2023-09-01 14:07:23,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:23,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2023-09-01 14:07:23,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:23,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:23,837 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:23,837 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 9 states and 1627 transitions. [2023-09-01 14:07:23,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 606 flow [2023-09-01 14:07:23,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 99 transitions, 577 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 14:07:23,844 INFO L231 Difference]: Finished difference. Result has 57 places, 71 transitions, 413 flow [2023-09-01 14:07:23,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2023-09-01 14:07:23,846 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2023-09-01 14:07:23,846 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 413 flow [2023-09-01 14:07:23,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:23,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:23,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:23,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:07:23,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:23,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash 740987369, now seen corresponding path program 4 times [2023-09-01 14:07:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:23,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257801359] [2023-09-01 14:07:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257801359] [2023-09-01 14:07:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257801359] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:23,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:23,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:07:23,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60939307] [2023-09-01 14:07:23,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:07:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:07:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:07:24,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-09-01 14:07:24,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:24,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:24,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-09-01 14:07:24,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:24,128 INFO L130 PetriNetUnfolder]: 532/822 cut-off events. [2023-09-01 14:07:24,128 INFO L131 PetriNetUnfolder]: For 759/768 co-relation queries the response was YES. [2023-09-01 14:07:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 822 events. 532/822 cut-off events. For 759/768 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2946 event pairs, 156 based on Foata normal form. 63/725 useless extension candidates. Maximal degree in co-relation 2773. Up to 541 conditions per place. [2023-09-01 14:07:24,134 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-09-01 14:07:24,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 501 flow [2023-09-01 14:07:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:07:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:07:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-09-01 14:07:24,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46445497630331756 [2023-09-01 14:07:24,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-09-01 14:07:24,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-09-01 14:07:24,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:24,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-09-01 14:07:24,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:24,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:24,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:24,141 INFO L175 Difference]: Start difference. First operand has 57 places, 71 transitions, 413 flow. Second operand 3 states and 588 transitions. [2023-09-01 14:07:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 501 flow [2023-09-01 14:07:24,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 459 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-09-01 14:07:24,147 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 324 flow [2023-09-01 14:07:24,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-09-01 14:07:24,148 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-09-01 14:07:24,150 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 324 flow [2023-09-01 14:07:24,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:24,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:24,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:07:24,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:24,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1391984997, now seen corresponding path program 5 times [2023-09-01 14:07:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990118011] [2023-09-01 14:07:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:24,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990118011] [2023-09-01 14:07:24,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990118011] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:24,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:24,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 14:07:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41573708] [2023-09-01 14:07:24,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:24,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:07:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:07:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:07:25,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-09-01 14:07:25,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:25,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:25,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-09-01 14:07:25,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:25,471 INFO L130 PetriNetUnfolder]: 607/947 cut-off events. [2023-09-01 14:07:25,471 INFO L131 PetriNetUnfolder]: For 773/773 co-relation queries the response was YES. [2023-09-01 14:07:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 947 events. 607/947 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3552 event pairs, 113 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3294. Up to 719 conditions per place. [2023-09-01 14:07:25,478 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 83 selfloop transitions, 23 changer transitions 3/109 dead transitions. [2023-09-01 14:07:25,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 717 flow [2023-09-01 14:07:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:07:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:07:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1639 transitions. [2023-09-01 14:07:25,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154291732490785 [2023-09-01 14:07:25,483 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1639 transitions. [2023-09-01 14:07:25,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1639 transitions. [2023-09-01 14:07:25,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:25,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1639 transitions. [2023-09-01 14:07:25,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.11111111111111) internal successors, (1639), 9 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:25,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:25,492 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:25,493 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 324 flow. Second operand 9 states and 1639 transitions. [2023-09-01 14:07:25,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 717 flow [2023-09-01 14:07:25,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 704 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 14:07:25,499 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 460 flow [2023-09-01 14:07:25,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-09-01 14:07:25,501 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-09-01 14:07:25,501 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 460 flow [2023-09-01 14:07:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:25,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:07:25,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:25,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash 948876929, now seen corresponding path program 6 times [2023-09-01 14:07:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234737107] [2023-09-01 14:07:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:26,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234737107] [2023-09-01 14:07:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234737107] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:26,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:26,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 14:07:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581661973] [2023-09-01 14:07:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:07:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:07:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:07:26,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2023-09-01 14:07:26,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 460 flow. Second operand has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:26,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2023-09-01 14:07:26,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:26,680 INFO L130 PetriNetUnfolder]: 616/971 cut-off events. [2023-09-01 14:07:26,680 INFO L131 PetriNetUnfolder]: For 1279/1279 co-relation queries the response was YES. [2023-09-01 14:07:26,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 971 events. 616/971 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3710 event pairs, 163 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3637. Up to 832 conditions per place. [2023-09-01 14:07:26,687 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 86 selfloop transitions, 19 changer transitions 3/108 dead transitions. [2023-09-01 14:07:26,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 824 flow [2023-09-01 14:07:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:07:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:07:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2023-09-01 14:07:26,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42706687730384413 [2023-09-01 14:07:26,692 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2023-09-01 14:07:26,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2023-09-01 14:07:26,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:26,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2023-09-01 14:07:26,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,701 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,701 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 460 flow. Second operand 9 states and 1622 transitions. [2023-09-01 14:07:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 824 flow [2023-09-01 14:07:26,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 755 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-09-01 14:07:26,712 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 532 flow [2023-09-01 14:07:26,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-09-01 14:07:26,713 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-09-01 14:07:26,713 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 532 flow [2023-09-01 14:07:26,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:26,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:26,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 14:07:26,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:26,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1017322832, now seen corresponding path program 1 times [2023-09-01 14:07:26,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:26,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445099228] [2023-09-01 14:07:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:26,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445099228] [2023-09-01 14:07:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445099228] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:07:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008683668] [2023-09-01 14:07:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:26,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:07:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:07:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:07:26,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-09-01 14:07:26,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:26,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:26,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-09-01 14:07:26,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:27,031 INFO L130 PetriNetUnfolder]: 804/1266 cut-off events. [2023-09-01 14:07:27,031 INFO L131 PetriNetUnfolder]: For 2099/2107 co-relation queries the response was YES. [2023-09-01 14:07:27,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1266 events. 804/1266 cut-off events. For 2099/2107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5315 event pairs, 219 based on Foata normal form. 20/1038 useless extension candidates. Maximal degree in co-relation 4841. Up to 576 conditions per place. [2023-09-01 14:07:27,040 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-09-01 14:07:27,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 904 flow [2023-09-01 14:07:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:07:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:07:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-09-01 14:07:27,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-09-01 14:07:27,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-09-01 14:07:27,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-09-01 14:07:27,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:27,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-09-01 14:07:27,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:27,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:27,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:27,048 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 532 flow. Second operand 4 states and 800 transitions. [2023-09-01 14:07:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 904 flow [2023-09-01 14:07:27,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 842 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-09-01 14:07:27,066 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 640 flow [2023-09-01 14:07:27,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-09-01 14:07:27,067 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2023-09-01 14:07:27,067 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 640 flow [2023-09-01 14:07:27,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:27,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:27,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:27,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 14:07:27,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:27,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1082305135, now seen corresponding path program 1 times [2023-09-01 14:07:27,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:27,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901293835] [2023-09-01 14:07:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901293835] [2023-09-01 14:07:27,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901293835] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932175094] [2023-09-01 14:07:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:27,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:27,217 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 14:07:27,222 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 14:07:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:07:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:27,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:27,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932175094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:27,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:27,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 14:07:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666961331] [2023-09-01 14:07:27,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:27,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:07:27,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:07:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:07:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-09-01 14:07:27,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 640 flow. Second operand has 12 states, 12 states have (on average 176.16666666666666) internal successors, (2114), 12 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:27,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:27,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-09-01 14:07:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:28,108 INFO L130 PetriNetUnfolder]: 1246/1997 cut-off events. [2023-09-01 14:07:28,109 INFO L131 PetriNetUnfolder]: For 4938/4954 co-relation queries the response was YES. [2023-09-01 14:07:28,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1997 events. 1246/1997 cut-off events. For 4938/4954 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9188 event pairs, 582 based on Foata normal form. 80/1713 useless extension candidates. Maximal degree in co-relation 8818. Up to 1138 conditions per place. [2023-09-01 14:07:28,122 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-09-01 14:07:28,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1568 flow [2023-09-01 14:07:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:07:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:07:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1099 transitions. [2023-09-01 14:07:28,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434044233807267 [2023-09-01 14:07:28,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1099 transitions. [2023-09-01 14:07:28,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1099 transitions. [2023-09-01 14:07:28,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:28,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1099 transitions. [2023-09-01 14:07:28,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:28,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:28,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:28,139 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 640 flow. Second operand 6 states and 1099 transitions. [2023-09-01 14:07:28,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1568 flow [2023-09-01 14:07:28,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1530 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-09-01 14:07:28,164 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 704 flow [2023-09-01 14:07:28,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-09-01 14:07:28,165 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-09-01 14:07:28,165 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 704 flow [2023-09-01 14:07:28,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.16666666666666) internal successors, (2114), 12 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:28,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:28,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:28,173 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 14:07:28,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:07:28,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:28,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:28,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1111418417, now seen corresponding path program 1 times [2023-09-01 14:07:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:28,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698152741] [2023-09-01 14:07:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:28,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:28,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698152741] [2023-09-01 14:07:28,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698152741] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:28,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954369361] [2023-09-01 14:07:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:28,523 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 14:07:28,526 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 14:07:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:07:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:28,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954369361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:28,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:28,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:07:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537849586] [2023-09-01 14:07:28,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:28,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:07:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:07:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:07:28,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2023-09-01 14:07:28,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 176.25) internal successors, (2115), 12 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:28,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:28,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2023-09-01 14:07:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:29,403 INFO L130 PetriNetUnfolder]: 1736/2875 cut-off events. [2023-09-01 14:07:29,403 INFO L131 PetriNetUnfolder]: For 7604/7636 co-relation queries the response was YES. [2023-09-01 14:07:29,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2875 events. 1736/2875 cut-off events. For 7604/7636 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15170 event pairs, 907 based on Foata normal form. 108/2571 useless extension candidates. Maximal degree in co-relation 12076. Up to 1792 conditions per place. [2023-09-01 14:07:29,420 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2023-09-01 14:07:29,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1384 flow [2023-09-01 14:07:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:07:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:07:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1099 transitions. [2023-09-01 14:07:29,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434044233807267 [2023-09-01 14:07:29,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1099 transitions. [2023-09-01 14:07:29,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1099 transitions. [2023-09-01 14:07:29,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:29,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1099 transitions. [2023-09-01 14:07:29,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:29,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:29,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:29,430 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 704 flow. Second operand 6 states and 1099 transitions. [2023-09-01 14:07:29,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1384 flow [2023-09-01 14:07:29,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1332 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-09-01 14:07:29,481 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 761 flow [2023-09-01 14:07:29,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-09-01 14:07:29,481 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-09-01 14:07:29,481 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 761 flow [2023-09-01 14:07:29,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.25) internal successors, (2115), 12 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:29,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:29,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:29,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:29,688 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,SelfDestructingSolverStorable11 [2023-09-01 14:07:29,689 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:29,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 719392531, now seen corresponding path program 2 times [2023-09-01 14:07:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967400863] [2023-09-01 14:07:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967400863] [2023-09-01 14:07:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967400863] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732819167] [2023-09-01 14:07:30,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:07:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:30,533 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 14:07:30,556 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 14:07:30,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:07:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:07:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:30,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:30,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:31,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:31,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:31,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:31,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-09-01 14:07:31,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-09-01 14:07:31,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 14:07:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:31,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732819167] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:31,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:31,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-09-01 14:07:31,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960784944] [2023-09-01 14:07:31,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:31,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:07:31,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:31,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:07:31,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=582, Unknown=3, NotChecked=0, Total=702 [2023-09-01 14:07:32,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 422 [2023-09-01 14:07:32,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 761 flow. Second operand has 27 states, 27 states have (on average 148.25925925925927) internal successors, (4003), 27 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:32,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:32,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 422 [2023-09-01 14:07:32,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:35,450 INFO L130 PetriNetUnfolder]: 4086/6485 cut-off events. [2023-09-01 14:07:35,450 INFO L131 PetriNetUnfolder]: For 15273/15345 co-relation queries the response was YES. [2023-09-01 14:07:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25267 conditions, 6485 events. 4086/6485 cut-off events. For 15273/15345 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 37263 event pairs, 505 based on Foata normal form. 73/5398 useless extension candidates. Maximal degree in co-relation 25237. Up to 2119 conditions per place. [2023-09-01 14:07:35,540 INFO L137 encePairwiseOnDemand]: 410/422 looper letters, 341 selfloop transitions, 121 changer transitions 2/466 dead transitions. [2023-09-01 14:07:35,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 466 transitions, 3979 flow [2023-09-01 14:07:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:07:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:07:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5132 transitions. [2023-09-01 14:07:35,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36851931638661495 [2023-09-01 14:07:35,554 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5132 transitions. [2023-09-01 14:07:35,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5132 transitions. [2023-09-01 14:07:35,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:35,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5132 transitions. [2023-09-01 14:07:35,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 155.5151515151515) internal successors, (5132), 33 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:35,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:35,584 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:35,584 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 761 flow. Second operand 33 states and 5132 transitions. [2023-09-01 14:07:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 466 transitions, 3979 flow [2023-09-01 14:07:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 466 transitions, 3826 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-09-01 14:07:35,688 INFO L231 Difference]: Finished difference. Result has 134 places, 195 transitions, 1983 flow [2023-09-01 14:07:35,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1983, PETRI_PLACES=134, PETRI_TRANSITIONS=195} [2023-09-01 14:07:35,689 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-09-01 14:07:35,689 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 195 transitions, 1983 flow [2023-09-01 14:07:35,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 148.25925925925927) internal successors, (4003), 27 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:35,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:35,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:35,698 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 14:07:35,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:35,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:35,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:35,897 INFO L85 PathProgramCache]: Analyzing trace with hash -676808391, now seen corresponding path program 3 times [2023-09-01 14:07:35,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918032659] [2023-09-01 14:07:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918032659] [2023-09-01 14:07:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918032659] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448851663] [2023-09-01 14:07:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:07:37,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:37,065 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 14:07:37,087 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 14:07:37,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:07:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:07:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:37,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:07:37,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:37,500 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_473) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:07:37,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:37,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-09-01 14:07:37,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:07:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-09-01 14:07:37,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448851663] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:37,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2023-09-01 14:07:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552456949] [2023-09-01 14:07:37,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:07:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:07:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-09-01 14:07:37,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 422 [2023-09-01 14:07:37,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 195 transitions, 1983 flow. Second operand has 21 states, 21 states have (on average 135.85714285714286) internal successors, (2853), 21 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:37,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:37,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 422 [2023-09-01 14:07:37,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:39,551 INFO L130 PetriNetUnfolder]: 5557/8726 cut-off events. [2023-09-01 14:07:39,551 INFO L131 PetriNetUnfolder]: For 62459/62539 co-relation queries the response was YES. [2023-09-01 14:07:39,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43984 conditions, 8726 events. 5557/8726 cut-off events. For 62459/62539 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 51935 event pairs, 1190 based on Foata normal form. 32/8276 useless extension candidates. Maximal degree in co-relation 43935. Up to 4321 conditions per place. [2023-09-01 14:07:39,616 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 204 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2023-09-01 14:07:39,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 324 transitions, 3620 flow [2023-09-01 14:07:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:07:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:07:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1831 transitions. [2023-09-01 14:07:39,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3337586584032082 [2023-09-01 14:07:39,622 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1831 transitions. [2023-09-01 14:07:39,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1831 transitions. [2023-09-01 14:07:39,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:39,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1831 transitions. [2023-09-01 14:07:39,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 140.84615384615384) internal successors, (1831), 13 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:39,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:39,633 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:39,633 INFO L175 Difference]: Start difference. First operand has 134 places, 195 transitions, 1983 flow. Second operand 13 states and 1831 transitions. [2023-09-01 14:07:39,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 324 transitions, 3620 flow [2023-09-01 14:07:40,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 324 transitions, 3372 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-09-01 14:07:40,028 INFO L231 Difference]: Finished difference. Result has 144 places, 224 transitions, 2427 flow [2023-09-01 14:07:40,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2427, PETRI_PLACES=144, PETRI_TRANSITIONS=224} [2023-09-01 14:07:40,029 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-09-01 14:07:40,029 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 224 transitions, 2427 flow [2023-09-01 14:07:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 135.85714285714286) internal successors, (2853), 21 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:40,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:40,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:40,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:07:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:40,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:40,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash -122393817, now seen corresponding path program 2 times [2023-09-01 14:07:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:40,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289848983] [2023-09-01 14:07:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:40,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:07:40,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289848983] [2023-09-01 14:07:40,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289848983] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:07:40,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:07:40,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:07:40,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770689852] [2023-09-01 14:07:40,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:40,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:07:40,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:07:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:07:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-09-01 14:07:40,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 224 transitions, 2427 flow. Second operand has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:40,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:40,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-09-01 14:07:40,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:42,002 INFO L130 PetriNetUnfolder]: 6639/10416 cut-off events. [2023-09-01 14:07:42,002 INFO L131 PetriNetUnfolder]: For 87974/88078 co-relation queries the response was YES. [2023-09-01 14:07:42,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55064 conditions, 10416 events. 6639/10416 cut-off events. For 87974/88078 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 63517 event pairs, 1207 based on Foata normal form. 202/10028 useless extension candidates. Maximal degree in co-relation 55014. Up to 6858 conditions per place. [2023-09-01 14:07:42,065 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 195 selfloop transitions, 47 changer transitions 44/288 dead transitions. [2023-09-01 14:07:42,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 288 transitions, 3520 flow [2023-09-01 14:07:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:07:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:07:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-09-01 14:07:42,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-09-01 14:07:42,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-09-01 14:07:42,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-09-01 14:07:42,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:42,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-09-01 14:07:42,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:42,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:42,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:42,074 INFO L175 Difference]: Start difference. First operand has 144 places, 224 transitions, 2427 flow. Second operand 4 states and 806 transitions. [2023-09-01 14:07:42,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 288 transitions, 3520 flow [2023-09-01 14:07:42,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 288 transitions, 3440 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-09-01 14:07:42,512 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1903 flow [2023-09-01 14:07:42,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1903, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2023-09-01 14:07:42,513 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2023-09-01 14:07:42,513 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1903 flow [2023-09-01 14:07:42,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:42,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:42,514 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:42,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 14:07:42,514 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:42,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1898689555, now seen corresponding path program 4 times [2023-09-01 14:07:42,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:42,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303515052] [2023-09-01 14:07:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:42,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303515052] [2023-09-01 14:07:43,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303515052] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790750090] [2023-09-01 14:07:43,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:07:43,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:43,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:43,432 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 14:07:43,434 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 14:07:43,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:07:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 14:07:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:43,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:07:43,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:43,818 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_562) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:07:43,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:43,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-09-01 14:07:43,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:07:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:07:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790750090] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:43,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:07:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8] total 22 [2023-09-01 14:07:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563080207] [2023-09-01 14:07:43,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:07:43,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:07:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:07:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=397, Unknown=1, NotChecked=40, Total=506 [2023-09-01 14:07:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 422 [2023-09-01 14:07:43,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1903 flow. Second operand has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:43,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:43,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 422 [2023-09-01 14:07:43,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:45,463 INFO L130 PetriNetUnfolder]: 7644/11819 cut-off events. [2023-09-01 14:07:45,463 INFO L131 PetriNetUnfolder]: For 127557/127645 co-relation queries the response was YES. [2023-09-01 14:07:45,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68124 conditions, 11819 events. 7644/11819 cut-off events. For 127557/127645 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 71589 event pairs, 1903 based on Foata normal form. 76/11273 useless extension candidates. Maximal degree in co-relation 68077. Up to 6403 conditions per place. [2023-09-01 14:07:45,530 INFO L137 encePairwiseOnDemand]: 408/422 looper letters, 167 selfloop transitions, 104 changer transitions 0/273 dead transitions. [2023-09-01 14:07:45,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 273 transitions, 3308 flow [2023-09-01 14:07:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:07:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:07:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1181 transitions. [2023-09-01 14:07:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997968855788761 [2023-09-01 14:07:45,533 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1181 transitions. [2023-09-01 14:07:45,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1181 transitions. [2023-09-01 14:07:45,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:45,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1181 transitions. [2023-09-01 14:07:45,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:45,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:45,539 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:45,539 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1903 flow. Second operand 7 states and 1181 transitions. [2023-09-01 14:07:45,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 273 transitions, 3308 flow [2023-09-01 14:07:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 273 transitions, 3162 flow, removed 73 selfloop flow, removed 5 redundant places. [2023-09-01 14:07:46,097 INFO L231 Difference]: Finished difference. Result has 126 places, 224 transitions, 2706 flow [2023-09-01 14:07:46,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2706, PETRI_PLACES=126, PETRI_TRANSITIONS=224} [2023-09-01 14:07:46,098 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 94 predicate places. [2023-09-01 14:07:46,098 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 224 transitions, 2706 flow [2023-09-01 14:07:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.42857142857142) internal successors, (1137), 7 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:46,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:46,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:46,104 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 14:07:46,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:07:46,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:46,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2146947131, now seen corresponding path program 5 times [2023-09-01 14:07:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48089360] [2023-09-01 14:07:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:07:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48089360] [2023-09-01 14:07:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48089360] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242938917] [2023-09-01 14:07:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:07:47,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:47,917 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 14:07:47,920 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 14:07:48,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:07:48,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 14:07:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:48,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:48,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:07:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:07:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:48,467 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_624) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:07:48,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:07:48,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-09-01 14:07:48,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-09-01 14:07:48,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 14:07:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:07:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242938917] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:48,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-09-01 14:07:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268346039] [2023-09-01 14:07:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:07:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:07:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=655, Unknown=1, NotChecked=52, Total=812 [2023-09-01 14:07:48,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 422 [2023-09-01 14:07:48,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 224 transitions, 2706 flow. Second operand has 29 states, 29 states have (on average 128.20689655172413) internal successors, (3718), 29 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:48,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:48,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 422 [2023-09-01 14:07:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:52,023 INFO L130 PetriNetUnfolder]: 8959/13906 cut-off events. [2023-09-01 14:07:52,024 INFO L131 PetriNetUnfolder]: For 151689/151689 co-relation queries the response was YES. [2023-09-01 14:07:52,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83573 conditions, 13906 events. 8959/13906 cut-off events. For 151689/151689 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 87807 event pairs, 902 based on Foata normal form. 140/13364 useless extension candidates. Maximal degree in co-relation 83527. Up to 5422 conditions per place. [2023-09-01 14:07:52,100 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 265 selfloop transitions, 238 changer transitions 2/505 dead transitions. [2023-09-01 14:07:52,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 505 transitions, 6880 flow [2023-09-01 14:07:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 14:07:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 14:07:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3333 transitions. [2023-09-01 14:07:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159241706161137 [2023-09-01 14:07:52,107 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3333 transitions. [2023-09-01 14:07:52,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3333 transitions. [2023-09-01 14:07:52,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:52,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3333 transitions. [2023-09-01 14:07:52,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 133.32) internal successors, (3333), 25 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:52,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 422.0) internal successors, (10972), 26 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:52,123 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 422.0) internal successors, (10972), 26 states have internal predecessors, (10972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:52,124 INFO L175 Difference]: Start difference. First operand has 126 places, 224 transitions, 2706 flow. Second operand 25 states and 3333 transitions. [2023-09-01 14:07:52,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 505 transitions, 6880 flow [2023-09-01 14:07:52,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 505 transitions, 6459 flow, removed 79 selfloop flow, removed 5 redundant places. [2023-09-01 14:07:52,770 INFO L231 Difference]: Finished difference. Result has 145 places, 321 transitions, 4142 flow [2023-09-01 14:07:52,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4142, PETRI_PLACES=145, PETRI_TRANSITIONS=321} [2023-09-01 14:07:52,770 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2023-09-01 14:07:52,771 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 321 transitions, 4142 flow [2023-09-01 14:07:52,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.20689655172413) internal successors, (3718), 29 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:52,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:52,778 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 14:07:52,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:07:52,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:52,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash 591879251, now seen corresponding path program 1 times [2023-09-01 14:07:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597087323] [2023-09-01 14:07:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:07:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:53,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597087323] [2023-09-01 14:07:53,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597087323] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:53,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927918884] [2023-09-01 14:07:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:53,469 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 14:07:53,495 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 14:07:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 14:07:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:07:53,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:07:53,740 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:07:53,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:07:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:07:53,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927918884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:07:53,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:07:53,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 10 [2023-09-01 14:07:53,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312108913] [2023-09-01 14:07:53,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:07:53,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 14:07:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:07:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 14:07:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 14:07:54,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 422 [2023-09-01 14:07:54,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 321 transitions, 4142 flow. Second operand has 11 states, 11 states have (on average 170.63636363636363) internal successors, (1877), 11 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:54,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:07:54,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 422 [2023-09-01 14:07:54,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:07:56,807 INFO L130 PetriNetUnfolder]: 12725/18944 cut-off events. [2023-09-01 14:07:56,807 INFO L131 PetriNetUnfolder]: For 204604/204718 co-relation queries the response was YES. [2023-09-01 14:07:56,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120179 conditions, 18944 events. 12725/18944 cut-off events. For 204604/204718 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 118273 event pairs, 3446 based on Foata normal form. 0/18502 useless extension candidates. Maximal degree in co-relation 120134. Up to 6583 conditions per place. [2023-09-01 14:07:56,929 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 721 selfloop transitions, 51 changer transitions 0/776 dead transitions. [2023-09-01 14:07:56,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 776 transitions, 11494 flow [2023-09-01 14:07:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 14:07:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 14:07:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1756 transitions. [2023-09-01 14:07:56,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161137440758294 [2023-09-01 14:07:56,933 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1756 transitions. [2023-09-01 14:07:56,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1756 transitions. [2023-09-01 14:07:56,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:07:56,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1756 transitions. [2023-09-01 14:07:56,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:56,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:56,940 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 422.0) internal successors, (4642), 11 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:56,940 INFO L175 Difference]: Start difference. First operand has 145 places, 321 transitions, 4142 flow. Second operand 10 states and 1756 transitions. [2023-09-01 14:07:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 776 transitions, 11494 flow [2023-09-01 14:07:57,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 776 transitions, 11132 flow, removed 147 selfloop flow, removed 9 redundant places. [2023-09-01 14:07:57,942 INFO L231 Difference]: Finished difference. Result has 148 places, 355 transitions, 4612 flow [2023-09-01 14:07:57,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4612, PETRI_PLACES=148, PETRI_TRANSITIONS=355} [2023-09-01 14:07:57,943 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 116 predicate places. [2023-09-01 14:07:57,943 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 355 transitions, 4612 flow [2023-09-01 14:07:57,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.63636363636363) internal successors, (1877), 11 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:07:57,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:07:57,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:07:57,949 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 14:07:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:58,144 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:07:58,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:07:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1826093481, now seen corresponding path program 2 times [2023-09-01 14:07:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:07:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067949314] [2023-09-01 14:07:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:07:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:07:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:07:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:07:58,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:07:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067949314] [2023-09-01 14:07:58,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067949314] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:07:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053564006] [2023-09-01 14:07:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:07:58,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:07:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:07:58,735 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 14:07:58,737 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 14:07:58,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:07:58,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:07:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2023-09-01 14:07:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:07:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:07:59,728 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 14:07:59,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-09-01 14:07:59,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-09-01 14:07:59,836 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 14:07:59,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:00,221 INFO L321 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-09-01 14:08:00,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 106 [2023-09-01 14:08:00,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:08:00,871 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 14:08:00,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053564006] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:08:00,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:08:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2023-09-01 14:08:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845279417] [2023-09-01 14:08:00,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:08:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:08:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:08:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:08:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 14:08:02,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 422 [2023-09-01 14:08:02,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 355 transitions, 4612 flow. Second operand has 35 states, 35 states have (on average 150.14285714285714) internal successors, (5255), 35 states have internal predecessors, (5255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:02,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:08:02,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 422 [2023-09-01 14:08:02,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:08:19,953 INFO L130 PetriNetUnfolder]: 33492/50240 cut-off events. [2023-09-01 14:08:19,953 INFO L131 PetriNetUnfolder]: For 548708/548808 co-relation queries the response was YES. [2023-09-01 14:08:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318100 conditions, 50240 events. 33492/50240 cut-off events. For 548708/548808 co-relation queries the response was YES. Maximal size of possible extension queue 1924. Compared 357984 event pairs, 3346 based on Foata normal form. 994/51222 useless extension candidates. Maximal degree in co-relation 318052. Up to 13786 conditions per place. [2023-09-01 14:08:20,458 INFO L137 encePairwiseOnDemand]: 408/422 looper letters, 1592 selfloop transitions, 1354 changer transitions 2/2952 dead transitions. [2023-09-01 14:08:20,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 2952 transitions, 41515 flow [2023-09-01 14:08:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-09-01 14:08:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-09-01 14:08:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 15569 transitions. [2023-09-01 14:08:20,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3726602518071712 [2023-09-01 14:08:20,477 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 15569 transitions. [2023-09-01 14:08:20,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 15569 transitions. [2023-09-01 14:08:20,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:08:20,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 15569 transitions. [2023-09-01 14:08:20,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 157.26262626262627) internal successors, (15569), 99 states have internal predecessors, (15569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:20,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 422.0) internal successors, (42200), 100 states have internal predecessors, (42200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:20,539 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 422.0) internal successors, (42200), 100 states have internal predecessors, (42200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:20,539 INFO L175 Difference]: Start difference. First operand has 148 places, 355 transitions, 4612 flow. Second operand 99 states and 15569 transitions. [2023-09-01 14:08:20,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 2952 transitions, 41515 flow [2023-09-01 14:08:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 2952 transitions, 41189 flow, removed 135 selfloop flow, removed 3 redundant places. [2023-09-01 14:08:23,969 INFO L231 Difference]: Finished difference. Result has 292 places, 1839 transitions, 30171 flow [2023-09-01 14:08:23,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=30171, PETRI_PLACES=292, PETRI_TRANSITIONS=1839} [2023-09-01 14:08:23,969 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 260 predicate places. [2023-09-01 14:08:23,970 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 1839 transitions, 30171 flow [2023-09-01 14:08:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 150.14285714285714) internal successors, (5255), 35 states have internal predecessors, (5255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:08:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:08:23,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:08:23,980 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 14:08:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:24,171 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:08:24,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:08:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 42047138, now seen corresponding path program 1 times [2023-09-01 14:08:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:08:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081104951] [2023-09-01 14:08:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:08:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:08:27,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:08:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081104951] [2023-09-01 14:08:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081104951] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:08:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198988439] [2023-09-01 14:08:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:08:27,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:08:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:08:27,014 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 14:08:27,015 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 14:08:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:08:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 14:08:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:08:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:08:27,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:08:30,406 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-09-01 14:08:32,474 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-09-01 14:09:04,645 WARN L222 SmtUtils]: Spent 32.08s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:09:04,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:09:04,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-09-01 14:09:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-09-01 14:09:11,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198988439] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:09:11,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:09:11,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2023-09-01 14:09:11,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876618905] [2023-09-01 14:09:11,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:09:11,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 14:09:11,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:09:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 14:09:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1237, Unknown=2, NotChecked=142, Total=1482 [2023-09-01 14:09:11,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-09-01 14:09:11,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1839 transitions, 30171 flow. Second operand has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:11,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:09:11,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-09-01 14:09:11,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:09:20,074 WARN L222 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 80 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:09:33,123 WARN L222 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 83 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:09:51,607 INFO L130 PetriNetUnfolder]: 34227/51532 cut-off events. [2023-09-01 14:09:51,608 INFO L131 PetriNetUnfolder]: For 2469881/2469881 co-relation queries the response was YES. [2023-09-01 14:09:52,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459528 conditions, 51532 events. 34227/51532 cut-off events. For 2469881/2469881 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 367605 event pairs, 9708 based on Foata normal form. 4/51536 useless extension candidates. Maximal degree in co-relation 459430. Up to 49396 conditions per place. [2023-09-01 14:09:52,604 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1835 selfloop transitions, 214 changer transitions 4/2053 dead transitions. [2023-09-01 14:09:52,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 2053 transitions, 36706 flow [2023-09-01 14:09:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:09:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:09:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3324 transitions. [2023-09-01 14:09:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2813134732566012 [2023-09-01 14:09:52,609 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3324 transitions. [2023-09-01 14:09:52,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3324 transitions. [2023-09-01 14:09:52,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:09:52,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3324 transitions. [2023-09-01 14:09:52,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.71428571428571) internal successors, (3324), 28 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:52,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 422.0) internal successors, (12238), 29 states have internal predecessors, (12238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:52,623 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 422.0) internal successors, (12238), 29 states have internal predecessors, (12238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:09:52,624 INFO L175 Difference]: Start difference. First operand has 292 places, 1839 transitions, 30171 flow. Second operand 28 states and 3324 transitions. [2023-09-01 14:09:52,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 2053 transitions, 36706 flow [2023-09-01 14:10:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 2053 transitions, 33486 flow, removed 1504 selfloop flow, removed 15 redundant places. [2023-09-01 14:10:37,056 INFO L231 Difference]: Finished difference. Result has 316 places, 1938 transitions, 29317 flow [2023-09-01 14:10:37,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=27137, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=29317, PETRI_PLACES=316, PETRI_TRANSITIONS=1938} [2023-09-01 14:10:37,058 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 284 predicate places. [2023-09-01 14:10:37,058 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1938 transitions, 29317 flow [2023-09-01 14:10:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:10:37,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:10:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:10:37,064 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 14:10:37,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:37,260 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:10:37,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:10:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -209186642, now seen corresponding path program 2 times [2023-09-01 14:10:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:10:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687816306] [2023-09-01 14:10:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:10:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:10:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:10:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:39,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:10:39,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687816306] [2023-09-01 14:10:39,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687816306] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:10:39,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596468035] [2023-09-01 14:10:39,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:10:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:10:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:10:39,454 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 14:10:39,456 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 14:10:39,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:10:39,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:10:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-09-01 14:10:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:10:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:40,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:10:41,877 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-09-01 14:10:41,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 246 [2023-09-01 14:10:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:10:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596468035] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:10:43,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:10:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-09-01 14:10:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445280023] [2023-09-01 14:10:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:10:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 14:10:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:10:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 14:10:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2023-09-01 14:10:50,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-09-01 14:10:50,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1938 transitions, 29317 flow. Second operand has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:10:50,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:10:50,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-09-01 14:10:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:11:23,396 INFO L130 PetriNetUnfolder]: 36035/54426 cut-off events. [2023-09-01 14:11:23,396 INFO L131 PetriNetUnfolder]: For 2572159/2572159 co-relation queries the response was YES. [2023-09-01 14:11:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466521 conditions, 54426 events. 36035/54426 cut-off events. For 2572159/2572159 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 395886 event pairs, 4909 based on Foata normal form. 9/53429 useless extension candidates. Maximal degree in co-relation 466416. Up to 25303 conditions per place. [2023-09-01 14:11:24,499 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1258 selfloop transitions, 1232 changer transitions 14/2504 dead transitions. [2023-09-01 14:11:24,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 2504 transitions, 41186 flow [2023-09-01 14:11:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 14:11:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 14:11:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7434 transitions. [2023-09-01 14:11:24,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387714181553044 [2023-09-01 14:11:24,511 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7434 transitions. [2023-09-01 14:11:24,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7434 transitions. [2023-09-01 14:11:24,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:11:24,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7434 transitions. [2023-09-01 14:11:24,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 142.96153846153845) internal successors, (7434), 52 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:11:24,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:11:24,537 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:11:24,537 INFO L175 Difference]: Start difference. First operand has 316 places, 1938 transitions, 29317 flow. Second operand 52 states and 7434 transitions. [2023-09-01 14:11:24,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 2504 transitions, 41186 flow [2023-09-01 14:12:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 2504 transitions, 40954 flow, removed 98 selfloop flow, removed 9 redundant places. [2023-09-01 14:12:00,239 INFO L231 Difference]: Finished difference. Result has 377 places, 2185 transitions, 37981 flow [2023-09-01 14:12:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=29087, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=37981, PETRI_PLACES=377, PETRI_TRANSITIONS=2185} [2023-09-01 14:12:00,241 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-09-01 14:12:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2185 transitions, 37981 flow [2023-09-01 14:12:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:12:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:12:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:12:00,248 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 14:12:00,442 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,SelfDestructingSolverStorable20 [2023-09-01 14:12:00,443 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:12:00,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:12:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1868070854, now seen corresponding path program 3 times [2023-09-01 14:12:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:12:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004637798] [2023-09-01 14:12:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:12:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:12:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:12:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:02,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:12:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004637798] [2023-09-01 14:12:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004637798] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:12:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687184351] [2023-09-01 14:12:02,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:12:02,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:12:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:12:02,737 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 14:12:02,739 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 14:12:02,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:12:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:12:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-09-01 14:12:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:12:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:04,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:12:05,111 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-09-01 14:12:05,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 246 [2023-09-01 14:12:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:12:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687184351] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:12:06,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:12:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-09-01 14:12:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244686642] [2023-09-01 14:12:06,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:12:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 14:12:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:12:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 14:12:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2023-09-01 14:12:13,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-09-01 14:12:13,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2185 transitions, 37981 flow. Second operand has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:12:13,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:12:13,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-09-01 14:12:13,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:12:52,764 INFO L130 PetriNetUnfolder]: 37942/57472 cut-off events. [2023-09-01 14:12:52,764 INFO L131 PetriNetUnfolder]: For 2943149/2943149 co-relation queries the response was YES. [2023-09-01 14:12:54,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544149 conditions, 57472 events. 37942/57472 cut-off events. For 2943149/2943149 co-relation queries the response was YES. Maximal size of possible extension queue 2314. Compared 424486 event pairs, 5018 based on Foata normal form. 8/56516 useless extension candidates. Maximal degree in co-relation 544025. Up to 25826 conditions per place. [2023-09-01 14:12:54,775 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1327 selfloop transitions, 1393 changer transitions 12/2732 dead transitions. [2023-09-01 14:12:54,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2732 transitions, 50040 flow [2023-09-01 14:12:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 14:12:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 14:12:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7467 transitions. [2023-09-01 14:12:54,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3402752460809333 [2023-09-01 14:12:54,782 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7467 transitions. [2023-09-01 14:12:54,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7467 transitions. [2023-09-01 14:12:54,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:12:54,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7467 transitions. [2023-09-01 14:12:54,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 143.59615384615384) internal successors, (7467), 52 states have internal predecessors, (7467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:12:54,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:12:54,808 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 422.0) internal successors, (22366), 53 states have internal predecessors, (22366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:12:54,808 INFO L175 Difference]: Start difference. First operand has 377 places, 2185 transitions, 37981 flow. Second operand 52 states and 7467 transitions. [2023-09-01 14:12:54,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2732 transitions, 50040 flow [2023-09-01 14:14:13,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 2732 transitions, 48928 flow, removed 498 selfloop flow, removed 16 redundant places. [2023-09-01 14:14:13,110 INFO L231 Difference]: Finished difference. Result has 428 places, 2392 transitions, 43521 flow [2023-09-01 14:14:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=36945, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=43521, PETRI_PLACES=428, PETRI_TRANSITIONS=2392} [2023-09-01 14:14:13,112 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 396 predicate places. [2023-09-01 14:14:13,112 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 2392 transitions, 43521 flow [2023-09-01 14:14:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 136.8) internal successors, (6840), 50 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:14:13,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:14:13,113 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:14:13,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:14:13,319 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,SelfDestructingSolverStorable21 [2023-09-01 14:14:13,320 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:14:13,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:14:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1059594603, now seen corresponding path program 3 times [2023-09-01 14:14:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:14:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984389021] [2023-09-01 14:14:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:14:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:14:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:14:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:14:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:14:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984389021] [2023-09-01 14:14:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984389021] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:14:15,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796851245] [2023-09-01 14:14:15,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:14:15,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:14:15,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:14:15,258 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 14:14:15,259 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 14:14:15,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:14:15,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:14:15,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:14:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:14:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:14:15,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:14:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:14:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:14:15,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:14:15,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-09-01 14:14:15,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:14:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:14:15,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796851245] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:14:15,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:14:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 25 [2023-09-01 14:14:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623099039] [2023-09-01 14:14:15,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:14:15,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 14:14:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:14:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 14:14:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2023-09-01 14:14:16,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 422 [2023-09-01 14:14:16,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 2392 transitions, 43521 flow. Second operand has 26 states, 26 states have (on average 127.61538461538461) internal successors, (3318), 26 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:14:16,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:14:16,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 422 [2023-09-01 14:14:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:14:48,606 INFO L130 PetriNetUnfolder]: 45569/67870 cut-off events. [2023-09-01 14:14:48,606 INFO L131 PetriNetUnfolder]: For 3273273/3273273 co-relation queries the response was YES. [2023-09-01 14:14:49,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689130 conditions, 67870 events. 45569/67870 cut-off events. For 3273273/3273273 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 500782 event pairs, 7386 based on Foata normal form. 604/67814 useless extension candidates. Maximal degree in co-relation 688991. Up to 22605 conditions per place. [2023-09-01 14:14:50,118 INFO L137 encePairwiseOnDemand]: 407/422 looper letters, 2869 selfloop transitions, 377 changer transitions 0/3246 dead transitions. [2023-09-01 14:14:50,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 3246 transitions, 66218 flow [2023-09-01 14:14:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:14:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:14:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2650 transitions. [2023-09-01 14:14:50,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31398104265402843 [2023-09-01 14:14:50,121 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2650 transitions. [2023-09-01 14:14:50,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2650 transitions. [2023-09-01 14:14:50,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:14:50,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2650 transitions. [2023-09-01 14:14:50,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.5) internal successors, (2650), 20 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:14:50,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:14:50,131 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:14:50,131 INFO L175 Difference]: Start difference. First operand has 428 places, 2392 transitions, 43521 flow. Second operand 20 states and 2650 transitions. [2023-09-01 14:14:50,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 3246 transitions, 66218 flow [2023-09-01 14:15:41,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 3246 transitions, 63784 flow, removed 1017 selfloop flow, removed 38 redundant places. [2023-09-01 14:15:41,505 INFO L231 Difference]: Finished difference. Result has 397 places, 2174 transitions, 38785 flow [2023-09-01 14:15:41,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=35765, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=38785, PETRI_PLACES=397, PETRI_TRANSITIONS=2174} [2023-09-01 14:15:41,507 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 365 predicate places. [2023-09-01 14:15:41,507 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 2174 transitions, 38785 flow [2023-09-01 14:15:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 127.61538461538461) internal successors, (3318), 26 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:15:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:15:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:15:41,517 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 14:15:41,715 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,SelfDestructingSolverStorable22 [2023-09-01 14:15:41,715 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:15:41,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:15:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1816562324, now seen corresponding path program 4 times [2023-09-01 14:15:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:15:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533234821] [2023-09-01 14:15:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:15:41,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:15:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:15:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:15:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:15:43,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533234821] [2023-09-01 14:15:43,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533234821] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:15:43,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654273191] [2023-09-01 14:15:43,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:15:43,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:15:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:15:43,593 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 14:15:43,594 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 14:15:43,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:15:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:15:43,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 14:15:43,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:15:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:15:44,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:16:13,072 WARN L222 SmtUtils]: Spent 28.15s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:16:43,638 WARN L222 SmtUtils]: Spent 30.44s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:16:43,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:16:43,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 296 [2023-09-01 14:16:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:16:47,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654273191] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:16:47,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:16:47,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 36 [2023-09-01 14:16:47,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001701332] [2023-09-01 14:16:47,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:16:47,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:16:47,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:16:47,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:16:47,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 14:16:49,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:16:51,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:16:53,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:16:56,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:16:58,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:00,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:02,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:04,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:07,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:09,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:11,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:13,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:15,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:17,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:19,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:21,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:23,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:25,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:17:26,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 422 [2023-09-01 14:17:26,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 2174 transitions, 38785 flow. Second operand has 38 states, 38 states have (on average 130.26315789473685) internal successors, (4950), 38 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:17:26,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:17:26,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 422 [2023-09-01 14:17:26,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:18:02,490 INFO L130 PetriNetUnfolder]: 46884/70146 cut-off events. [2023-09-01 14:18:02,491 INFO L131 PetriNetUnfolder]: For 2616750/2616750 co-relation queries the response was YES. [2023-09-01 14:18:03,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684873 conditions, 70146 events. 46884/70146 cut-off events. For 2616750/2616750 co-relation queries the response was YES. Maximal size of possible extension queue 2872. Compared 520101 event pairs, 11476 based on Foata normal form. 5/69387 useless extension candidates. Maximal degree in co-relation 684741. Up to 59492 conditions per place. [2023-09-01 14:18:03,935 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 1873 selfloop transitions, 677 changer transitions 33/2583 dead transitions. [2023-09-01 14:18:03,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 2583 transitions, 49423 flow [2023-09-01 14:18:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 14:18:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 14:18:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5025 transitions. [2023-09-01 14:18:03,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218265659023953 [2023-09-01 14:18:03,940 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5025 transitions. [2023-09-01 14:18:03,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5025 transitions. [2023-09-01 14:18:03,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:18:03,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5025 transitions. [2023-09-01 14:18:03,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 135.8108108108108) internal successors, (5025), 37 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:03,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:03,956 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:03,956 INFO L175 Difference]: Start difference. First operand has 397 places, 2174 transitions, 38785 flow. Second operand 37 states and 5025 transitions. [2023-09-01 14:18:03,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 2583 transitions, 49423 flow [2023-09-01 14:18:43,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2583 transitions, 48867 flow, removed 126 selfloop flow, removed 9 redundant places. [2023-09-01 14:18:43,417 INFO L231 Difference]: Finished difference. Result has 434 places, 2381 transitions, 44197 flow [2023-09-01 14:18:43,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=38393, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=44197, PETRI_PLACES=434, PETRI_TRANSITIONS=2381} [2023-09-01 14:18:43,418 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 402 predicate places. [2023-09-01 14:18:43,418 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 2381 transitions, 44197 flow [2023-09-01 14:18:43,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 130.26315789473685) internal successors, (4950), 38 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:43,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:18:43,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:18:43,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:18:43,625 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,SelfDestructingSolverStorable23 [2023-09-01 14:18:43,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:18:43,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:18:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash 629112284, now seen corresponding path program 5 times [2023-09-01 14:18:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:18:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082414090] [2023-09-01 14:18:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:18:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:18:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:18:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:18:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:18:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082414090] [2023-09-01 14:18:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082414090] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:18:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565110174] [2023-09-01 14:18:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:18:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:18:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:18:45,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:18:45,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:18:45,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:18:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:18:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 82 conjunts are in the unsatisfiable core [2023-09-01 14:18:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:18:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:18:46,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:18:47,632 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-09-01 14:18:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-09-01 14:18:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:18:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565110174] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:18:49,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:18:49,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-09-01 14:18:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703642946] [2023-09-01 14:18:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:18:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 14:18:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:18:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 14:18:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2023-09-01 14:18:56,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 422 [2023-09-01 14:18:56,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 2381 transitions, 44197 flow. Second operand has 46 states, 46 states have (on average 135.91304347826087) internal successors, (6252), 46 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:18:56,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:18:56,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 422 [2023-09-01 14:18:56,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:53,401 WARN L222 SmtUtils]: Spent 38.16s on a formula simplification. DAG size of input: 123 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:20:12,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:20:15,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15