./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:43:11,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:43:11,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:43:11,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:43:11,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:43:11,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:43:11,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:43:11,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:43:11,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:43:11,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:43:11,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:43:11,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:43:11,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:43:11,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:43:11,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:43:11,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:43:11,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:43:11,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:43:11,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:43:11,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:43:11,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:43:11,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:43:11,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:43:11,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:43:11,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:43:11,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:43:11,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:43:11,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:43:11,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:43:11,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:43:11,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:43:11,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:43:11,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:43:11,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:43:11,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:43:11,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:43:11,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:43:11,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:43:11,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:43:11,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:43:11,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:43:11,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:43:11,221 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:43:11,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:43:11,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:43:11,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:43:11,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:43:11,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:43:11,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:43:11,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:43:11,223 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:43:11,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:43:11,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:43:11,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:43:11,225 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:43:11,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:43:11,225 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:43:11,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:43:11,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:43:11,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:43:11,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:43:11,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:43:11,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:43:11,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:43:11,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:43:11,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:43:11,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:43:11,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:43:11,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:43:11,227 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:43:11,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:43:11,228 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:43:11,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:43:11,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:43:11,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:43:11,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:43:11,556 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:43:11,559 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:43:11,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 21:43:12,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:43:12,859 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:43:12,859 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-30 21:43:12,865 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba11d78d/256de675c6124bcf9a3774a3b0db7009/FLAG3625b97c4 [2023-08-30 21:43:12,876 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba11d78d/256de675c6124bcf9a3774a3b0db7009 [2023-08-30 21:43:12,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:43:12,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:43:12,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:43:12,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:43:12,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:43:12,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:43:12" (1/1) ... [2023-08-30 21:43:12,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6910fa16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:12, skipping insertion in model container [2023-08-30 21:43:12,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:43:12" (1/1) ... [2023-08-30 21:43:12,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:43:12,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:43:13,055 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/test-context1.wvr.c[2433,2446] [2023-08-30 21:43:13,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:43:13,075 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:43:13,115 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/test-context1.wvr.c[2433,2446] [2023-08-30 21:43:13,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:43:13,131 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:43:13,133 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:43:13,138 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:43:13,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13 WrapperNode [2023-08-30 21:43:13,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:43:13,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:43:13,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:43:13,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:43:13,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,192 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-08-30 21:43:13,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:43:13,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:43:13,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:43:13,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:43:13,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,238 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:43:13,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:43:13,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:43:13,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:43:13,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (1/1) ... [2023-08-30 21:43:13,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:43:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:13,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:43:13,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:43:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:43:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:43:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:43:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:43:13,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:43:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:43:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:43:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:43:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:43:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:43:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:43:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:43:13,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:43:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:43:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:43:13,340 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:43:13,432 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:43:13,434 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:43:13,648 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:43:13,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:43:13,770 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:43:13,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:43:13 BoogieIcfgContainer [2023-08-30 21:43:13,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:43:13,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:43:13,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:43:13,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:43:13,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:43:12" (1/3) ... [2023-08-30 21:43:13,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ea50c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:43:13, skipping insertion in model container [2023-08-30 21:43:13,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:43:13" (2/3) ... [2023-08-30 21:43:13,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ea50c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:43:13, skipping insertion in model container [2023-08-30 21:43:13,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:43:13" (3/3) ... [2023-08-30 21:43:13,785 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-30 21:43:13,792 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:43:13,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:43:13,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:43:13,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:43:13,873 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:43:13,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 236 flow [2023-08-30 21:43:13,971 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-08-30 21:43:13,978 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:43:13,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-30 21:43:13,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 110 transitions, 236 flow [2023-08-30 21:43:13,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 100 transitions, 212 flow [2023-08-30 21:43:13,991 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:43:13,999 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 100 transitions, 212 flow [2023-08-30 21:43:14,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 100 transitions, 212 flow [2023-08-30 21:43:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 212 flow [2023-08-30 21:43:14,044 INFO L130 PetriNetUnfolder]: 9/100 cut-off events. [2023-08-30 21:43:14,049 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:43:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 9/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-30 21:43:14,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-30 21:43:17,357 INFO L134 LiptonReduction]: Checked pairs total: 513 [2023-08-30 21:43:17,358 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-30 21:43:17,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:43:17,376 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;@6c9a8149, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:43:17,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:43:17,381 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-08-30 21:43:17,381 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:43:17,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:17,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:17,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:17,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1991554592, now seen corresponding path program 1 times [2023-08-30 21:43:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:17,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936528099] [2023-08-30 21:43:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:17,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:17,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936528099] [2023-08-30 21:43:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936528099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:43:17,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:43:17,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:43:17,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430842052] [2023-08-30 21:43:17,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:43:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:43:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:43:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:43:18,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 211 [2023-08-30 21:43:18,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:18,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 211 [2023-08-30 21:43:18,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:18,207 INFO L130 PetriNetUnfolder]: 59/111 cut-off events. [2023-08-30 21:43:18,207 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 21:43:18,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 111 events. 59/111 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-08-30 21:43:18,210 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 28 selfloop transitions, 4 changer transitions 4/36 dead transitions. [2023-08-30 21:43:18,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 36 transitions, 174 flow [2023-08-30 21:43:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:43:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:43:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-08-30 21:43:18,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476303317535545 [2023-08-30 21:43:18,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-08-30 21:43:18,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-08-30 21:43:18,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:18,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-08-30 21:43:18,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,249 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 402 transitions. [2023-08-30 21:43:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 36 transitions, 174 flow [2023-08-30 21:43:18,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:43:18,254 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 61 flow [2023-08-30 21:43:18,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-30 21:43:18,258 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-08-30 21:43:18,259 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 61 flow [2023-08-30 21:43:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:18,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:18,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:43:18,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:18,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:18,266 INFO L85 PathProgramCache]: Analyzing trace with hash 220979605, now seen corresponding path program 1 times [2023-08-30 21:43:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:18,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131792878] [2023-08-30 21:43:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:18,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131792878] [2023-08-30 21:43:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131792878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:43:18,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:43:18,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:43:18,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393368135] [2023-08-30 21:43:18,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:43:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:43:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:43:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:43:18,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-30 21:43:18,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:18,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-30 21:43:18,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:18,439 INFO L130 PetriNetUnfolder]: 87/173 cut-off events. [2023-08-30 21:43:18,439 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 21:43:18,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 173 events. 87/173 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 566 event pairs, 26 based on Foata normal form. 12/157 useless extension candidates. Maximal degree in co-relation 224. Up to 117 conditions per place. [2023-08-30 21:43:18,441 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-08-30 21:43:18,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 136 flow [2023-08-30 21:43:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:43:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:43:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-30 21:43:18,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49447077409162715 [2023-08-30 21:43:18,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-30 21:43:18,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-30 21:43:18,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:18,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-30 21:43:18,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,446 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 61 flow. Second operand 3 states and 313 transitions. [2023-08-30 21:43:18,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 136 flow [2023-08-30 21:43:18,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 21:43:18,448 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 75 flow [2023-08-30 21:43:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 21:43:18,449 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-30 21:43:18,449 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 75 flow [2023-08-30 21:43:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:18,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:43:18,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:18,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2120815196, now seen corresponding path program 1 times [2023-08-30 21:43:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336652018] [2023-08-30 21:43:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336652018] [2023-08-30 21:43:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336652018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:43:18,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:43:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:43:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510788800] [2023-08-30 21:43:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:43:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:43:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:43:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:43:18,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 211 [2023-08-30 21:43:18,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:18,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 211 [2023-08-30 21:43:18,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:18,736 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-08-30 21:43:18,736 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-30 21:43:18,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 44 based on Foata normal form. 6/136 useless extension candidates. Maximal degree in co-relation 249. Up to 103 conditions per place. [2023-08-30 21:43:18,740 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-08-30 21:43:18,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 148 flow [2023-08-30 21:43:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:43:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:43:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 387 transitions. [2023-08-30 21:43:18,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585308056872038 [2023-08-30 21:43:18,742 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 387 transitions. [2023-08-30 21:43:18,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 387 transitions. [2023-08-30 21:43:18,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:18,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 387 transitions. [2023-08-30 21:43:18,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,747 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 75 flow. Second operand 4 states and 387 transitions. [2023-08-30 21:43:18,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 148 flow [2023-08-30 21:43:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:43:18,748 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 76 flow [2023-08-30 21:43:18,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-30 21:43:18,749 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-08-30 21:43:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 76 flow [2023-08-30 21:43:18,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:18,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:18,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:43:18,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:18,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2067904534, now seen corresponding path program 1 times [2023-08-30 21:43:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:18,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055336678] [2023-08-30 21:43:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:19,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055336678] [2023-08-30 21:43:19,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055336678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670391697] [2023-08-30 21:43:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:19,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:19,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:43:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:43:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:19,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:43:19,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:19,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:19,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:19,573 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-08-30 21:43:19,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:19,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-30 21:43:19,595 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:43:19,596 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 324 treesize of output 289 [2023-08-30 21:43:19,610 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:43:19,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-08-30 21:43:19,629 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:43:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 97 treesize of output 67 [2023-08-30 21:43:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 21:43:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670391697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:19,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-30 21:43:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839007674] [2023-08-30 21:43:19,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:43:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:43:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=104, Unknown=7, NotChecked=22, Total=182 [2023-08-30 21:43:19,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-08-30 21:43:19,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 76 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:19,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:19,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-08-30 21:43:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:19,782 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-08-30 21:43:19,923 INFO L130 PetriNetUnfolder]: 136/258 cut-off events. [2023-08-30 21:43:19,923 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 21:43:19,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 258 events. 136/258 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 962 event pairs, 21 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 665. Up to 79 conditions per place. [2023-08-30 21:43:19,925 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-08-30 21:43:19,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 69 transitions, 363 flow [2023-08-30 21:43:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:43:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:43:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-08-30 21:43:19,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358609794628752 [2023-08-30 21:43:19,928 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-08-30 21:43:19,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-08-30 21:43:19,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:19,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-08-30 21:43:19,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:19,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 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) [2023-08-30 21:43:19,933 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 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) [2023-08-30 21:43:19,934 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 76 flow. Second operand 9 states and 681 transitions. [2023-08-30 21:43:19,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 69 transitions, 363 flow [2023-08-30 21:43:19,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 69 transitions, 353 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 21:43:19,936 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 185 flow [2023-08-30 21:43:19,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-30 21:43:19,937 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2023-08-30 21:43:19,937 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 185 flow [2023-08-30 21:43:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:19,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:19,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:19,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:20,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:20,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:20,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2125347476, now seen corresponding path program 2 times [2023-08-30 21:43:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191400715] [2023-08-30 21:43:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191400715] [2023-08-30 21:43:20,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191400715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:20,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666171046] [2023-08-30 21:43:20,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:43:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:20,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:20,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:43:20,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:43:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 21:43:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:20,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:43:20,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 21:43:20,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:43:20,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:20,837 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 17 treesize of output 10 [2023-08-30 21:43:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:20,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:20,875 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_104 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_104) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-30 21:43:20,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:20,889 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 34 [2023-08-30 21:43:20,893 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 9 treesize of output 3 [2023-08-30 21:43:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666171046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:20,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 21:43:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673552095] [2023-08-30 21:43:20,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:43:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:43:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-08-30 21:43:20,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-08-30 21:43:20,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 185 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:20,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:20,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-08-30 21:43:20,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:21,087 INFO L130 PetriNetUnfolder]: 148/276 cut-off events. [2023-08-30 21:43:21,089 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-30 21:43:21,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 276 events. 148/276 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1026 event pairs, 21 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 992. Up to 173 conditions per place. [2023-08-30 21:43:21,090 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-08-30 21:43:21,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 378 flow [2023-08-30 21:43:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:43:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:43:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-08-30 21:43:21,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990521327014218 [2023-08-30 21:43:21,093 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-08-30 21:43:21,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-08-30 21:43:21,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:21,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-08-30 21:43:21,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 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) [2023-08-30 21:43:21,097 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 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) [2023-08-30 21:43:21,097 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 185 flow. Second operand 5 states and 421 transitions. [2023-08-30 21:43:21,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 378 flow [2023-08-30 21:43:21,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 362 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 21:43:21,103 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 204 flow [2023-08-30 21:43:21,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 21:43:21,105 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-08-30 21:43:21,106 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 204 flow [2023-08-30 21:43:21,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:21,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:21,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:21,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:21,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1479539105, now seen corresponding path program 3 times [2023-08-30 21:43:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365733575] [2023-08-30 21:43:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365733575] [2023-08-30 21:43:21,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365733575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:21,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027222990] [2023-08-30 21:43:21,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:43:21,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:21,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:43:21,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:43:21,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:43:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:21,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027222990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:21,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-30 21:43:21,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664960783] [2023-08-30 21:43:21,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:43:21,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:43:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:43:21,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-30 21:43:21,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:21,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-30 21:43:21,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:21,593 INFO L130 PetriNetUnfolder]: 248/479 cut-off events. [2023-08-30 21:43:21,593 INFO L131 PetriNetUnfolder]: For 941/941 co-relation queries the response was YES. [2023-08-30 21:43:21,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2155 event pairs, 80 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1742. Up to 306 conditions per place. [2023-08-30 21:43:21,596 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-08-30 21:43:21,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 446 flow [2023-08-30 21:43:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:43:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:43:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-30 21:43:21,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49881516587677727 [2023-08-30 21:43:21,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-30 21:43:21,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-30 21:43:21,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:21,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-30 21:43:21,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,604 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,604 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 204 flow. Second operand 4 states and 421 transitions. [2023-08-30 21:43:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 446 flow [2023-08-30 21:43:21,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 417 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 21:43:21,609 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 287 flow [2023-08-30 21:43:21,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-30 21:43:21,611 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2023-08-30 21:43:21,611 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 287 flow [2023-08-30 21:43:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:21,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:21,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:21,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:21,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:21,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1493740304, now seen corresponding path program 4 times [2023-08-30 21:43:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:21,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140958388] [2023-08-30 21:43:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140958388] [2023-08-30 21:43:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140958388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464248074] [2023-08-30 21:43:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:43:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:21,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:43:22,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:43:22,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:43:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:22,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464248074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:22,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:22,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 21:43:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503368184] [2023-08-30 21:43:22,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:43:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:43:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:43:22,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-30 21:43:22,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:22,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:22,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-30 21:43:22,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:22,612 INFO L130 PetriNetUnfolder]: 288/586 cut-off events. [2023-08-30 21:43:22,612 INFO L131 PetriNetUnfolder]: For 1450/1450 co-relation queries the response was YES. [2023-08-30 21:43:22,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 586 events. 288/586 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2921 event pairs, 166 based on Foata normal form. 23/609 useless extension candidates. Maximal degree in co-relation 1829. Up to 455 conditions per place. [2023-08-30 21:43:22,615 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-08-30 21:43:22,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 579 flow [2023-08-30 21:43:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:43:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:43:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2023-08-30 21:43:22,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44278943805010157 [2023-08-30 21:43:22,618 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2023-08-30 21:43:22,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2023-08-30 21:43:22,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:22,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2023-08-30 21:43:22,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:22,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 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) [2023-08-30 21:43:22,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 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) [2023-08-30 21:43:22,622 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 287 flow. Second operand 7 states and 654 transitions. [2023-08-30 21:43:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 579 flow [2023-08-30 21:43:22,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 569 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 21:43:22,627 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 311 flow [2023-08-30 21:43:22,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-30 21:43:22,628 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2023-08-30 21:43:22,628 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 311 flow [2023-08-30 21:43:22,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:22,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:22,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:22,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:22,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:22,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash 88962534, now seen corresponding path program 5 times [2023-08-30 21:43:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898160535] [2023-08-30 21:43:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:23,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:23,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898160535] [2023-08-30 21:43:23,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898160535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:23,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855218575] [2023-08-30 21:43:23,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:43:23,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:23,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:43:23,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:43:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 21:43:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:23,440 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:43:23,440 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 21 treesize of output 10 [2023-08-30 21:43:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:23,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:23,496 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:43:23,497 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 28 treesize of output 11 [2023-08-30 21:43:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:23,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855218575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:23,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-08-30 21:43:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485477942] [2023-08-30 21:43:23,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:43:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:43:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:43:23,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-30 21:43:23,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 311 flow. Second operand has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:23,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:23,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-30 21:43:23,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:24,380 INFO L130 PetriNetUnfolder]: 350/661 cut-off events. [2023-08-30 21:43:24,380 INFO L131 PetriNetUnfolder]: For 1370/1370 co-relation queries the response was YES. [2023-08-30 21:43:24,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 661 events. 350/661 cut-off events. For 1370/1370 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3189 event pairs, 30 based on Foata normal form. 5/666 useless extension candidates. Maximal degree in co-relation 2614. Up to 422 conditions per place. [2023-08-30 21:43:24,385 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-08-30 21:43:24,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 1101 flow [2023-08-30 21:43:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:43:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:43:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1657 transitions. [2023-08-30 21:43:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43628225381779884 [2023-08-30 21:43:24,389 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1657 transitions. [2023-08-30 21:43:24,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1657 transitions. [2023-08-30 21:43:24,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:24,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1657 transitions. [2023-08-30 21:43:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.05555555555556) internal successors, (1657), 18 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:24,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:24,400 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:24,400 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 311 flow. Second operand 18 states and 1657 transitions. [2023-08-30 21:43:24,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 1101 flow [2023-08-30 21:43:24,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 149 transitions, 1071 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-30 21:43:24,406 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 486 flow [2023-08-30 21:43:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-08-30 21:43:24,407 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-08-30 21:43:24,407 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 486 flow [2023-08-30 21:43:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:24,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 21:43:24,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:24,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:24,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1904152626, now seen corresponding path program 6 times [2023-08-30 21:43:24,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:24,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238541161] [2023-08-30 21:43:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:24,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:25,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:25,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238541161] [2023-08-30 21:43:25,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238541161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:25,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744596032] [2023-08-30 21:43:25,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:43:25,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:25,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:25,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:43:25,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 21:43:25,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:25,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 21:43:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:43:25,306 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 16 treesize of output 18 [2023-08-30 21:43:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:25,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:25,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:25,449 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 47 treesize of output 35 [2023-08-30 21:43:25,453 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 10 treesize of output 3 [2023-08-30 21:43:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744596032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:25,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:25,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 21:43:25,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672714640] [2023-08-30 21:43:25,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:25,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:43:25,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:25,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:43:25,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=358, Unknown=3, NotChecked=0, Total=420 [2023-08-30 21:43:25,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 211 [2023-08-30 21:43:25,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 486 flow. Second operand has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:25,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:25,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 211 [2023-08-30 21:43:25,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:26,115 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (and (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) 5) (= 5 c_~x~0) (forall ((v_ArrVal_233 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_233) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)) 5)))) is different from false [2023-08-30 21:43:26,357 INFO L130 PetriNetUnfolder]: 486/934 cut-off events. [2023-08-30 21:43:26,357 INFO L131 PetriNetUnfolder]: For 2844/2844 co-relation queries the response was YES. [2023-08-30 21:43:26,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 934 events. 486/934 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4929 event pairs, 52 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 3885. Up to 583 conditions per place. [2023-08-30 21:43:26,363 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 63 selfloop transitions, 38 changer transitions 35/136 dead transitions. [2023-08-30 21:43:26,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 1230 flow [2023-08-30 21:43:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 21:43:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 21:43:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1256 transitions. [2023-08-30 21:43:26,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42518618821936355 [2023-08-30 21:43:26,367 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1256 transitions. [2023-08-30 21:43:26,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1256 transitions. [2023-08-30 21:43:26,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:26,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1256 transitions. [2023-08-30 21:43:26,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:26,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:26,375 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:26,375 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 486 flow. Second operand 14 states and 1256 transitions. [2023-08-30 21:43:26,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 1230 flow [2023-08-30 21:43:26,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1054 flow, removed 66 selfloop flow, removed 7 redundant places. [2023-08-30 21:43:26,386 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 621 flow [2023-08-30 21:43:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=621, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-08-30 21:43:26,386 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 53 predicate places. [2023-08-30 21:43:26,387 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 621 flow [2023-08-30 21:43:26,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:26,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:26,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:26,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:26,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:26,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1205721493, now seen corresponding path program 7 times [2023-08-30 21:43:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:26,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791234199] [2023-08-30 21:43:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791234199] [2023-08-30 21:43:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791234199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782510722] [2023-08-30 21:43:26,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:43:26,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:26,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:26,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:26,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:43:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:43:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:26,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782510722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:26,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-08-30 21:43:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576810969] [2023-08-30 21:43:26,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:26,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:43:26,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:43:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:43:26,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-30 21:43:26,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 621 flow. Second operand has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:26,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:26,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-30 21:43:26,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:27,083 INFO L130 PetriNetUnfolder]: 840/1596 cut-off events. [2023-08-30 21:43:27,083 INFO L131 PetriNetUnfolder]: For 5254/5254 co-relation queries the response was YES. [2023-08-30 21:43:27,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1596 events. 840/1596 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9419 event pairs, 161 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 7234. Up to 991 conditions per place. [2023-08-30 21:43:27,094 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 65 selfloop transitions, 45 changer transitions 4/114 dead transitions. [2023-08-30 21:43:27,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 1310 flow [2023-08-30 21:43:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:43:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:43:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-08-30 21:43:27,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500473933649289 [2023-08-30 21:43:27,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-08-30 21:43:27,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-08-30 21:43:27,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:27,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-08-30 21:43:27,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:27,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 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) [2023-08-30 21:43:27,100 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 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) [2023-08-30 21:43:27,100 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 621 flow. Second operand 5 states and 528 transitions. [2023-08-30 21:43:27,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 1310 flow [2023-08-30 21:43:27,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 1182 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-08-30 21:43:27,117 INFO L231 Difference]: Finished difference. Result has 70 places, 85 transitions, 915 flow [2023-08-30 21:43:27,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=70, PETRI_TRANSITIONS=85} [2023-08-30 21:43:27,119 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2023-08-30 21:43:27,119 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 85 transitions, 915 flow [2023-08-30 21:43:27,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:27,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:27,119 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:27,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:27,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:27,325 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:27,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1918772906, now seen corresponding path program 8 times [2023-08-30 21:43:27,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:27,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541446652] [2023-08-30 21:43:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:27,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:27,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541446652] [2023-08-30 21:43:27,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541446652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010590379] [2023-08-30 21:43:27,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:43:27,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:27,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:27,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:43:27,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:43:27,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 21:43:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:27,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:27,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010590379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:27,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:27,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 21:43:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002969522] [2023-08-30 21:43:27,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:43:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:43:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-08-30 21:43:28,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-30 21:43:28,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 85 transitions, 915 flow. Second operand has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:28,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:28,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-30 21:43:28,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:28,717 INFO L130 PetriNetUnfolder]: 1013/1983 cut-off events. [2023-08-30 21:43:28,717 INFO L131 PetriNetUnfolder]: For 6338/6338 co-relation queries the response was YES. [2023-08-30 21:43:28,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 1983 events. 1013/1983 cut-off events. For 6338/6338 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12659 event pairs, 557 based on Foata normal form. 52/2035 useless extension candidates. Maximal degree in co-relation 8051. Up to 1534 conditions per place. [2023-08-30 21:43:28,729 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 82 selfloop transitions, 4 changer transitions 70/156 dead transitions. [2023-08-30 21:43:28,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 156 transitions, 1700 flow [2023-08-30 21:43:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 21:43:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 21:43:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2023-08-30 21:43:28,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44352290679304895 [2023-08-30 21:43:28,733 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2023-08-30 21:43:28,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2023-08-30 21:43:28,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:28,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2023-08-30 21:43:28,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:28,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:28,740 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:28,740 INFO L175 Difference]: Start difference. First operand has 70 places, 85 transitions, 915 flow. Second operand 12 states and 1123 transitions. [2023-08-30 21:43:28,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 156 transitions, 1700 flow [2023-08-30 21:43:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 156 transitions, 1621 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 21:43:28,761 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 931 flow [2023-08-30 21:43:28,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=931, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-08-30 21:43:28,762 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2023-08-30 21:43:28,762 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 931 flow [2023-08-30 21:43:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:28,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 21:43:28,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:28,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1263742992, now seen corresponding path program 9 times [2023-08-30 21:43:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66785535] [2023-08-30 21:43:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:29,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66785535] [2023-08-30 21:43:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66785535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439206903] [2023-08-30 21:43:29,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:43:29,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:29,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:29,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:29,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:43:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:43:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:29,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 21:43:29,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:29,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 21:43:29,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:30,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:30,350 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-30 21:43:30,351 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 26 treesize of output 10 [2023-08-30 21:43:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:30,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:30,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-30 21:43:30,980 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 21:43:30,980 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 152 treesize of output 138 [2023-08-30 21:43:30,993 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 21:43:30,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 133 treesize of output 103 [2023-08-30 21:43:31,005 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 21:43:31,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 67 [2023-08-30 21:43:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:43:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439206903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:31,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-08-30 21:43:31,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142732689] [2023-08-30 21:43:31,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 21:43:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 21:43:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=783, Unknown=2, NotChecked=0, Total=930 [2023-08-30 21:43:33,701 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] [2023-08-30 21:43:34,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-30 21:43:34,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 931 flow. Second operand has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:34,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:34,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-30 21:43:34,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:36,608 INFO L130 PetriNetUnfolder]: 1597/3061 cut-off events. [2023-08-30 21:43:36,609 INFO L131 PetriNetUnfolder]: For 9204/9204 co-relation queries the response was YES. [2023-08-30 21:43:36,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14170 conditions, 3061 events. 1597/3061 cut-off events. For 9204/9204 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20781 event pairs, 93 based on Foata normal form. 67/3128 useless extension candidates. Maximal degree in co-relation 14118. Up to 1891 conditions per place. [2023-08-30 21:43:36,625 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 95 selfloop transitions, 92 changer transitions 212/399 dead transitions. [2023-08-30 21:43:36,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 399 transitions, 3745 flow [2023-08-30 21:43:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 21:43:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 21:43:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2757 transitions. [2023-08-30 21:43:36,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32665876777251185 [2023-08-30 21:43:36,640 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2757 transitions. [2023-08-30 21:43:36,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2757 transitions. [2023-08-30 21:43:36,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:36,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2757 transitions. [2023-08-30 21:43:36,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 68.925) internal successors, (2757), 40 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:36,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:36,664 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:36,664 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 931 flow. Second operand 40 states and 2757 transitions. [2023-08-30 21:43:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 399 transitions, 3745 flow [2023-08-30 21:43:36,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 399 transitions, 3619 flow, removed 60 selfloop flow, removed 10 redundant places. [2023-08-30 21:43:36,717 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 1452 flow [2023-08-30 21:43:36,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1452, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2023-08-30 21:43:36,718 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 99 predicate places. [2023-08-30 21:43:36,718 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 1452 flow [2023-08-30 21:43:36,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:36,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:36,719 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:36,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:36,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:36,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:36,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 205051960, now seen corresponding path program 10 times [2023-08-30 21:43:36,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525082313] [2023-08-30 21:43:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:43:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525082313] [2023-08-30 21:43:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525082313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226015751] [2023-08-30 21:43:37,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:43:37,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:37,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:37,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:43:37,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:43:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 21:43:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:43:37,797 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 16 treesize of output 18 [2023-08-30 21:43:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:43:37,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:38,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:38,015 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 47 treesize of output 35 [2023-08-30 21:43:38,019 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 10 treesize of output 3 [2023-08-30 21:43:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:43:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226015751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:38,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-30 21:43:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931668370] [2023-08-30 21:43:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 21:43:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 21:43:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=781, Unknown=4, NotChecked=0, Total=870 [2023-08-30 21:43:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 211 [2023-08-30 21:43:38,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 1452 flow. Second operand has 30 states, 30 states have (on average 73.8) internal successors, (2214), 30 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:38,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:38,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 211 [2023-08-30 21:43:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:39,808 INFO L130 PetriNetUnfolder]: 1066/2007 cut-off events. [2023-08-30 21:43:39,808 INFO L131 PetriNetUnfolder]: For 8399/8399 co-relation queries the response was YES. [2023-08-30 21:43:39,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 2007 events. 1066/2007 cut-off events. For 8399/8399 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12343 event pairs, 52 based on Foata normal form. 1/2008 useless extension candidates. Maximal degree in co-relation 10155. Up to 1230 conditions per place. [2023-08-30 21:43:39,821 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 65 selfloop transitions, 93 changer transitions 44/202 dead transitions. [2023-08-30 21:43:39,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 202 transitions, 2346 flow [2023-08-30 21:43:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:43:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:43:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1423 transitions. [2023-08-30 21:43:39,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467087941021593 [2023-08-30 21:43:39,827 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1423 transitions. [2023-08-30 21:43:39,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1423 transitions. [2023-08-30 21:43:39,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1423 transitions. [2023-08-30 21:43:39,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.05555555555556) internal successors, (1423), 18 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:39,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:39,835 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:39,835 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 1452 flow. Second operand 18 states and 1423 transitions. [2023-08-30 21:43:39,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 202 transitions, 2346 flow [2023-08-30 21:43:39,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 2061 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-08-30 21:43:39,913 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1432 flow [2023-08-30 21:43:39,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1432, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-08-30 21:43:39,914 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 91 predicate places. [2023-08-30 21:43:39,914 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1432 flow [2023-08-30 21:43:39,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 73.8) internal successors, (2214), 30 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:39,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:39,915 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:39,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:40,120 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,SelfDestructingSolverStorable12 [2023-08-30 21:43:40,121 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:40,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash 290459673, now seen corresponding path program 11 times [2023-08-30 21:43:40,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284743771] [2023-08-30 21:43:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:43:40,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:40,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284743771] [2023-08-30 21:43:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284743771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917577813] [2023-08-30 21:43:40,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:43:40,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:40,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:40,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:40,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:43:40,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:43:40,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 21:43:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:43:40,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:43:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917577813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:40,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:40,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-30 21:43:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401255203] [2023-08-30 21:43:40,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:43:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:43:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:43:40,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-30 21:43:40,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:40,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:40,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-30 21:43:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:43:40,953 INFO L130 PetriNetUnfolder]: 2058/3848 cut-off events. [2023-08-30 21:43:40,953 INFO L131 PetriNetUnfolder]: For 16564/16564 co-relation queries the response was YES. [2023-08-30 21:43:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18595 conditions, 3848 events. 2058/3848 cut-off events. For 16564/16564 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26569 event pairs, 336 based on Foata normal form. 18/3866 useless extension candidates. Maximal degree in co-relation 18549. Up to 2364 conditions per place. [2023-08-30 21:43:40,973 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 93 selfloop transitions, 122 changer transitions 0/215 dead transitions. [2023-08-30 21:43:40,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 215 transitions, 3102 flow [2023-08-30 21:43:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:43:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:43:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-30 21:43:40,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015797788309637 [2023-08-30 21:43:40,974 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-30 21:43:40,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-30 21:43:40,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:43:40,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-30 21:43:40,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:40,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:40,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:40,977 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1432 flow. Second operand 6 states and 635 transitions. [2023-08-30 21:43:40,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 215 transitions, 3102 flow [2023-08-30 21:43:41,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 215 transitions, 2975 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-30 21:43:41,023 INFO L231 Difference]: Finished difference. Result has 107 places, 182 transitions, 2658 flow [2023-08-30 21:43:41,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2658, PETRI_PLACES=107, PETRI_TRANSITIONS=182} [2023-08-30 21:43:41,024 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-08-30 21:43:41,024 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 182 transitions, 2658 flow [2023-08-30 21:43:41,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:41,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:43:41,025 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:43:41,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:43:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:43:41,231 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:43:41,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:43:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1809702648, now seen corresponding path program 12 times [2023-08-30 21:43:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:43:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660307618] [2023-08-30 21:43:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:43:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:43:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:43:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:43:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660307618] [2023-08-30 21:43:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660307618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:43:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015891711] [2023-08-30 21:43:41,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:43:41,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:43:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:43:41,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:43:41,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:43:41,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 21:43:41,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:43:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 21:43:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:43:42,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 21:43:42,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:42,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:43:42,468 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:43:42,468 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 22 treesize of output 10 [2023-08-30 21:43:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:43:43,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:43:43,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-08-30 21:43:43,152 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:43:43,152 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 160 treesize of output 142 [2023-08-30 21:43:43,162 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:43:43,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 139 treesize of output 105 [2023-08-30 21:43:43,172 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:43:43,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 84 treesize of output 67 [2023-08-30 21:43:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:43:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015891711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:43:43,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:43:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-08-30 21:43:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338957993] [2023-08-30 21:43:43,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:43:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 21:43:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:43:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 21:43:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1605, Unknown=1, NotChecked=0, Total=1806 [2023-08-30 21:43:45,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-30 21:43:45,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 182 transitions, 2658 flow. Second operand has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:43:45,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:43:45,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-30 21:43:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:44:04,769 INFO L130 PetriNetUnfolder]: 8591/16018 cut-off events. [2023-08-30 21:44:04,769 INFO L131 PetriNetUnfolder]: For 70405/70405 co-relation queries the response was YES. [2023-08-30 21:44:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 16018 events. 8591/16018 cut-off events. For 70405/70405 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 138059 event pairs, 300 based on Foata normal form. 168/16186 useless extension candidates. Maximal degree in co-relation 67529. Up to 9851 conditions per place. [2023-08-30 21:44:04,852 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 608 selfloop transitions, 711 changer transitions 324/1643 dead transitions. [2023-08-30 21:44:04,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1643 transitions, 18837 flow [2023-08-30 21:44:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-08-30 21:44:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2023-08-30 21:44:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 9863 transitions. [2023-08-30 21:44:04,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32918363260129496 [2023-08-30 21:44:04,866 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 9863 transitions. [2023-08-30 21:44:04,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 9863 transitions. [2023-08-30 21:44:04,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:44:04,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 9863 transitions. [2023-08-30 21:44:04,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 69.45774647887323) internal successors, (9863), 142 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:04,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:04,913 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:04,913 INFO L175 Difference]: Start difference. First operand has 107 places, 182 transitions, 2658 flow. Second operand 142 states and 9863 transitions. [2023-08-30 21:44:04,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1643 transitions, 18837 flow [2023-08-30 21:44:05,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1643 transitions, 18553 flow, removed 142 selfloop flow, removed 0 redundant places. [2023-08-30 21:44:05,265 INFO L231 Difference]: Finished difference. Result has 326 places, 737 transitions, 12959 flow [2023-08-30 21:44:05,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=12959, PETRI_PLACES=326, PETRI_TRANSITIONS=737} [2023-08-30 21:44:05,266 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 307 predicate places. [2023-08-30 21:44:05,266 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 737 transitions, 12959 flow [2023-08-30 21:44:05,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:05,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:44:05,267 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:44:05,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:44:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:44:05,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:44:05,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:44:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -139368886, now seen corresponding path program 13 times [2023-08-30 21:44:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:44:05,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575595933] [2023-08-30 21:44:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:44:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:44:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:44:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:44:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:44:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575595933] [2023-08-30 21:44:06,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575595933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:44:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881980334] [2023-08-30 21:44:06,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:44:06,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:44:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:44:06,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:44:06,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:44:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:44:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:44:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:44:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:44:06,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:44:06,423 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:44:06,423 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 28 treesize of output 11 [2023-08-30 21:44:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:44:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881980334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:44:06,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:44:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 21:44:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877826699] [2023-08-30 21:44:06,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:44:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 21:44:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:44:06,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 21:44:06,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 21:44:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-30 21:44:07,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 737 transitions, 12959 flow. Second operand has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:07,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:44:07,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-30 21:44:07,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:44:13,382 INFO L130 PetriNetUnfolder]: 9459/17584 cut-off events. [2023-08-30 21:44:13,383 INFO L131 PetriNetUnfolder]: For 1085152/1085152 co-relation queries the response was YES. [2023-08-30 21:44:13,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133567 conditions, 17584 events. 9459/17584 cut-off events. For 1085152/1085152 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 152422 event pairs, 1145 based on Foata normal form. 37/17621 useless extension candidates. Maximal degree in co-relation 131935. Up to 10837 conditions per place. [2023-08-30 21:44:13,584 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 314 selfloop transitions, 707 changer transitions 163/1184 dead transitions. [2023-08-30 21:44:13,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1184 transitions, 20985 flow [2023-08-30 21:44:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 21:44:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 21:44:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4870 transitions. [2023-08-30 21:44:13,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435482428686399 [2023-08-30 21:44:13,590 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4870 transitions. [2023-08-30 21:44:13,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4870 transitions. [2023-08-30 21:44:13,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:44:13,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4870 transitions. [2023-08-30 21:44:13,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 91.88679245283019) internal successors, (4870), 53 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:13,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:13,611 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:13,611 INFO L175 Difference]: Start difference. First operand has 326 places, 737 transitions, 12959 flow. Second operand 53 states and 4870 transitions. [2023-08-30 21:44:13,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1184 transitions, 20985 flow [2023-08-30 21:44:24,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1184 transitions, 19327 flow, removed 738 selfloop flow, removed 6 redundant places. [2023-08-30 21:44:24,112 INFO L231 Difference]: Finished difference. Result has 384 places, 824 transitions, 15285 flow [2023-08-30 21:44:24,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=11700, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=15285, PETRI_PLACES=384, PETRI_TRANSITIONS=824} [2023-08-30 21:44:24,113 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 365 predicate places. [2023-08-30 21:44:24,113 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 824 transitions, 15285 flow [2023-08-30 21:44:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:24,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:44:24,114 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:44:24,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:44:24,315 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,SelfDestructingSolverStorable15 [2023-08-30 21:44:24,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:44:24,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:44:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash 779977742, now seen corresponding path program 14 times [2023-08-30 21:44:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:44:24,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844681266] [2023-08-30 21:44:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:44:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:44:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:44:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:44:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:44:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844681266] [2023-08-30 21:44:25,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844681266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:44:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480560481] [2023-08-30 21:44:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:44:25,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:44:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:44:25,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:44:25,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:44:25,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:44:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:44:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 21:44:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:44:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:44:25,778 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 16 treesize of output 18 [2023-08-30 21:44:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:44:25,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:44:26,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:44:26,103 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 47 treesize of output 35 [2023-08-30 21:44:26,108 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 10 treesize of output 3 [2023-08-30 21:44:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:44:26,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480560481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:44:26,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:44:26,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-30 21:44:26,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101775176] [2023-08-30 21:44:26,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:44:26,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:44:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:44:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:44:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1233, Unknown=3, NotChecked=0, Total=1332 [2023-08-30 21:44:27,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-08-30 21:44:27,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 824 transitions, 15285 flow. Second operand has 37 states, 37 states have (on average 69.62162162162163) internal successors, (2576), 37 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:27,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:44:27,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-08-30 21:44:27,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:44:33,621 INFO L130 PetriNetUnfolder]: 9587/17810 cut-off events. [2023-08-30 21:44:33,621 INFO L131 PetriNetUnfolder]: For 1127527/1127527 co-relation queries the response was YES. [2023-08-30 21:44:33,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137446 conditions, 17810 events. 9587/17810 cut-off events. For 1127527/1127527 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 154126 event pairs, 1091 based on Foata normal form. 12/17822 useless extension candidates. Maximal degree in co-relation 137306. Up to 10981 conditions per place. [2023-08-30 21:44:33,809 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 173 selfloop transitions, 730 changer transitions 58/961 dead transitions. [2023-08-30 21:44:33,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 961 transitions, 18860 flow [2023-08-30 21:44:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:44:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:44:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1726 transitions. [2023-08-30 21:44:33,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35565629507521124 [2023-08-30 21:44:33,813 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1726 transitions. [2023-08-30 21:44:33,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1726 transitions. [2023-08-30 21:44:33,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:44:33,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1726 transitions. [2023-08-30 21:44:33,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 75.04347826086956) internal successors, (1726), 23 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:33,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:33,819 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:33,820 INFO L175 Difference]: Start difference. First operand has 384 places, 824 transitions, 15285 flow. Second operand 23 states and 1726 transitions. [2023-08-30 21:44:33,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 961 transitions, 18860 flow [2023-08-30 21:44:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 961 transitions, 17620 flow, removed 117 selfloop flow, removed 26 redundant places. [2023-08-30 21:44:41,939 INFO L231 Difference]: Finished difference. Result has 381 places, 832 transitions, 15742 flow [2023-08-30 21:44:41,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14045, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15742, PETRI_PLACES=381, PETRI_TRANSITIONS=832} [2023-08-30 21:44:41,940 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 362 predicate places. [2023-08-30 21:44:41,941 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 832 transitions, 15742 flow [2023-08-30 21:44:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 69.62162162162163) internal successors, (2576), 37 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:41,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:44:41,941 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:44:41,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:44:42,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:44:42,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:44:42,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:44:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash -25952981, now seen corresponding path program 15 times [2023-08-30 21:44:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:44:42,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348639973] [2023-08-30 21:44:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:44:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:44:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:44:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:44:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:44:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348639973] [2023-08-30 21:44:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348639973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:44:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192401903] [2023-08-30 21:44:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:44:42,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:44:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:44:42,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:44:42,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:44:42,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:44:42,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:44:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 21:44:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:44:42,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:44:42,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:44:42,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:44:43,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:44:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:44:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:44:43,214 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2023-08-30 21:44:43,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 19 [2023-08-30 21:44:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:44:43,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:44:44,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:44:44,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 117 [2023-08-30 21:44:44,834 INFO L321 Elim1Store]: treesize reduction 48, result has 35.1 percent of original size [2023-08-30 21:44:44,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 882 treesize of output 797 [2023-08-30 21:44:44,882 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,886 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:44:44,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 327 treesize of output 282 [2023-08-30 21:44:44,918 INFO L321 Elim1Store]: treesize reduction 73, result has 1.4 percent of original size [2023-08-30 21:44:44,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 295 treesize of output 205 [2023-08-30 21:44:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 21:44:45,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192401903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:44:45,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:44:45,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 31 [2023-08-30 21:44:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367609506] [2023-08-30 21:44:45,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:44:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:44:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:44:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:44:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=786, Unknown=3, NotChecked=0, Total=992 [2023-08-30 21:44:45,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-30 21:44:45,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 832 transitions, 15742 flow. Second operand has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:44:45,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:44:45,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-30 21:44:45,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:44:50,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:44:52,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:44:55,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:44:56,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:02,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:10,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:15,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:22,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:26,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:31,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:33,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:41,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:44,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:45:52,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:00,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:03,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:05,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:11,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:17,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:20,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:24,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:33,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:35,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:42,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:44,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:46,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:48,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:46:53,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:01,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:03,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:05,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:13,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:19,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:21,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:24,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:27,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:29,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:37,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:41,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:47,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:49,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:52,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:54,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:47:57,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:00,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:04,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:12,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:15,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:21,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:23,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:48:31,858 INFO L130 PetriNetUnfolder]: 29142/53906 cut-off events. [2023-08-30 21:48:31,858 INFO L131 PetriNetUnfolder]: For 3258612/3258612 co-relation queries the response was YES. [2023-08-30 21:48:32,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480467 conditions, 53906 events. 29142/53906 cut-off events. For 3258612/3258612 co-relation queries the response was YES. Maximal size of possible extension queue 3099. Compared 543465 event pairs, 3770 based on Foata normal form. 191/54097 useless extension candidates. Maximal degree in co-relation 480334. Up to 33421 conditions per place. [2023-08-30 21:48:32,697 INFO L137 encePairwiseOnDemand]: 202/211 looper letters, 509 selfloop transitions, 1035 changer transitions 1395/2939 dead transitions. [2023-08-30 21:48:32,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2939 transitions, 60751 flow [2023-08-30 21:48:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-30 21:48:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-30 21:48:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5943 transitions. [2023-08-30 21:48:32,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275101950843161 [2023-08-30 21:48:32,706 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5943 transitions. [2023-08-30 21:48:32,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5943 transitions. [2023-08-30 21:48:32,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:48:32,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5943 transitions. [2023-08-30 21:48:32,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 69.1046511627907) internal successors, (5943), 86 states have internal predecessors, (5943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:48:32,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 211.0) internal successors, (18357), 87 states have internal predecessors, (18357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:48:32,729 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 211.0) internal successors, (18357), 87 states have internal predecessors, (18357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:48:32,729 INFO L175 Difference]: Start difference. First operand has 381 places, 832 transitions, 15742 flow. Second operand 86 states and 5943 transitions. [2023-08-30 21:48:32,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2939 transitions, 60751 flow [2023-08-30 21:48:48,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 2939 transitions, 57324 flow, removed 234 selfloop flow, removed 19 redundant places. [2023-08-30 21:48:48,395 INFO L231 Difference]: Finished difference. Result has 479 places, 1331 transitions, 30258 flow [2023-08-30 21:48:48,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14396, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=30258, PETRI_PLACES=479, PETRI_TRANSITIONS=1331} [2023-08-30 21:48:48,396 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 460 predicate places. [2023-08-30 21:48:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1331 transitions, 30258 flow [2023-08-30 21:48:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:48:48,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:48:48,397 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:48:48,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:48:48,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:48:48,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:48:48,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:48:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1615859446, now seen corresponding path program 16 times [2023-08-30 21:48:48,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:48:48,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031530839] [2023-08-30 21:48:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:48:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:48:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:48:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 21:48:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:48:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031530839] [2023-08-30 21:48:48,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031530839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:48:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883361789] [2023-08-30 21:48:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:48:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:48:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:48:48,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:48:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:48:49,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:48:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:48:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 21:48:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:48:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 21:48:49,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:48:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 21:48:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883361789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:48:49,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:48:49,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 21:48:49,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111149025] [2023-08-30 21:48:49,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:48:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 21:48:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:48:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 21:48:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-08-30 21:48:49,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-30 21:48:49,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1331 transitions, 30258 flow. Second operand has 32 states, 32 states have (on average 88.71875) internal successors, (2839), 32 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:48:49,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:48:49,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-30 21:48:49,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:48:59,718 INFO L130 PetriNetUnfolder]: 12013/23269 cut-off events. [2023-08-30 21:48:59,718 INFO L131 PetriNetUnfolder]: For 1304775/1304775 co-relation queries the response was YES. [2023-08-30 21:49:00,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230831 conditions, 23269 events. 12013/23269 cut-off events. For 1304775/1304775 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 225660 event pairs, 6146 based on Foata normal form. 952/24221 useless extension candidates. Maximal degree in co-relation 230667. Up to 14413 conditions per place. [2023-08-30 21:49:00,063 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 567 selfloop transitions, 6 changer transitions 447/1020 dead transitions. [2023-08-30 21:49:00,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1020 transitions, 25806 flow [2023-08-30 21:49:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 21:49:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 21:49:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1108 transitions. [2023-08-30 21:49:00,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43759873617693523 [2023-08-30 21:49:00,066 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1108 transitions. [2023-08-30 21:49:00,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1108 transitions. [2023-08-30 21:49:00,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:00,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1108 transitions. [2023-08-30 21:49:00,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.33333333333333) internal successors, (1108), 12 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:00,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:00,071 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:00,071 INFO L175 Difference]: Start difference. First operand has 479 places, 1331 transitions, 30258 flow. Second operand 12 states and 1108 transitions. [2023-08-30 21:49:00,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1020 transitions, 25806 flow [2023-08-30 21:49:17,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1020 transitions, 22285 flow, removed 1579 selfloop flow, removed 61 redundant places. [2023-08-30 21:49:17,960 INFO L231 Difference]: Finished difference. Result has 375 places, 573 transitions, 11848 flow [2023-08-30 21:49:17,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=18703, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11848, PETRI_PLACES=375, PETRI_TRANSITIONS=573} [2023-08-30 21:49:17,961 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 356 predicate places. [2023-08-30 21:49:17,961 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 573 transitions, 11848 flow [2023-08-30 21:49:17,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 88.71875) internal successors, (2839), 32 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:17,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:17,962 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:17,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:18,163 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:18,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1406109756, now seen corresponding path program 17 times [2023-08-30 21:49:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:18,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703609274] [2023-08-30 21:49:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:18,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703609274] [2023-08-30 21:49:18,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703609274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675042975] [2023-08-30 21:49:18,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:49:18,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:18,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:18,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:49:18,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 21:49:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 21:49:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:49:19,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:19,514 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:49:19,514 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 28 treesize of output 11 [2023-08-30 21:49:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 21:49:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675042975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:19,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:19,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-08-30 21:49:19,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326093643] [2023-08-30 21:49:19,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 21:49:19,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 21:49:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 21:49:20,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-30 21:49:20,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 573 transitions, 11848 flow. Second operand has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:20,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-30 21:49:20,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:27,538 INFO L130 PetriNetUnfolder]: 9210/16913 cut-off events. [2023-08-30 21:49:27,538 INFO L131 PetriNetUnfolder]: For 325363/325363 co-relation queries the response was YES. [2023-08-30 21:49:27,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128208 conditions, 16913 events. 9210/16913 cut-off events. For 325363/325363 co-relation queries the response was YES. Maximal size of possible extension queue 1078. Compared 145256 event pairs, 643 based on Foata normal form. 11/16924 useless extension candidates. Maximal degree in co-relation 128106. Up to 10416 conditions per place. [2023-08-30 21:49:27,687 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 270 selfloop transitions, 685 changer transitions 240/1195 dead transitions. [2023-08-30 21:49:27,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1195 transitions, 21329 flow [2023-08-30 21:49:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 21:49:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 21:49:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6989 transitions. [2023-08-30 21:49:27,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43583187827388375 [2023-08-30 21:49:27,694 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6989 transitions. [2023-08-30 21:49:27,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6989 transitions. [2023-08-30 21:49:27,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:27,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6989 transitions. [2023-08-30 21:49:27,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 91.96052631578948) internal successors, (6989), 76 states have internal predecessors, (6989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,717 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,717 INFO L175 Difference]: Start difference. First operand has 375 places, 573 transitions, 11848 flow. Second operand 76 states and 6989 transitions. [2023-08-30 21:49:27,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1195 transitions, 21329 flow [2023-08-30 21:49:31,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1195 transitions, 19599 flow, removed 799 selfloop flow, removed 34 redundant places. [2023-08-30 21:49:31,146 INFO L231 Difference]: Finished difference. Result has 328 places, 714 transitions, 16684 flow [2023-08-30 21:49:31,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=11518, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=16684, PETRI_PLACES=328, PETRI_TRANSITIONS=714} [2023-08-30 21:49:31,147 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 309 predicate places. [2023-08-30 21:49:31,147 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 714 transitions, 16684 flow [2023-08-30 21:49:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:31,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:31,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:31,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:31,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:31,354 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:31,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1419600050, now seen corresponding path program 18 times [2023-08-30 21:49:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:31,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835872299] [2023-08-30 21:49:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:32,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835872299] [2023-08-30 21:49:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835872299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941811567] [2023-08-30 21:49:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:49:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:32,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:32,182 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:32,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:49:32,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 21:49:32,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:32,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 21:49:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:49:32,782 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 21 treesize of output 23 [2023-08-30 21:49:33,294 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-30 21:49:33,294 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 26 treesize of output 10 [2023-08-30 21:49:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:49:33,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:35,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:49:35,758 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 36 [2023-08-30 21:49:35,764 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 13 treesize of output 7 [2023-08-30 21:49:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 21:49:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941811567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:36,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-08-30 21:49:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178935736] [2023-08-30 21:49:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 21:49:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 21:49:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1802, Unknown=1, NotChecked=0, Total=2070 [2023-08-30 21:49:41,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:49:43,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:49:47,399 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] [2023-08-30 21:49:50,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 211 [2023-08-30 21:49:50,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 714 transitions, 16684 flow. Second operand has 46 states, 46 states have (on average 66.5) internal successors, (3059), 46 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:50,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:50,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 211 [2023-08-30 21:49:50,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:03,359 INFO L130 PetriNetUnfolder]: 12619/23576 cut-off events. [2023-08-30 21:50:03,359 INFO L131 PetriNetUnfolder]: For 293280/293280 co-relation queries the response was YES. [2023-08-30 21:50:03,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151596 conditions, 23576 events. 12619/23576 cut-off events. For 293280/293280 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 216516 event pairs, 860 based on Foata normal form. 387/23963 useless extension candidates. Maximal degree in co-relation 151502. Up to 14435 conditions per place. [2023-08-30 21:50:03,545 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 74 selfloop transitions, 686 changer transitions 534/1294 dead transitions. [2023-08-30 21:50:03,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1294 transitions, 28053 flow [2023-08-30 21:50:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 21:50:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 21:50:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3190 transitions. [2023-08-30 21:50:03,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34360189573459715 [2023-08-30 21:50:03,549 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3190 transitions. [2023-08-30 21:50:03,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3190 transitions. [2023-08-30 21:50:03,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:03,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3190 transitions. [2023-08-30 21:50:03,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.5) internal successors, (3190), 44 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,560 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,560 INFO L175 Difference]: Start difference. First operand has 328 places, 714 transitions, 16684 flow. Second operand 44 states and 3190 transitions. [2023-08-30 21:50:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1294 transitions, 28053 flow [2023-08-30 21:50:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1294 transitions, 25477 flow, removed 259 selfloop flow, removed 31 redundant places. [2023-08-30 21:50:06,837 INFO L231 Difference]: Finished difference. Result has 344 places, 716 transitions, 16499 flow [2023-08-30 21:50:06,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=15066, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16499, PETRI_PLACES=344, PETRI_TRANSITIONS=716} [2023-08-30 21:50:06,838 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 325 predicate places. [2023-08-30 21:50:06,838 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 716 transitions, 16499 flow [2023-08-30 21:50:06,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 66.5) internal successors, (3059), 46 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:06,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:06,839 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:06,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:07,040 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:07,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -46687399, now seen corresponding path program 19 times [2023-08-30 21:50:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272401501] [2023-08-30 21:50:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:07,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272401501] [2023-08-30 21:50:07,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272401501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63026141] [2023-08-30 21:50:07,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:50:07,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:07,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:07,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:50:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:07,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 21:50:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:07,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63026141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:07,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:07,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-08-30 21:50:07,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68264627] [2023-08-30 21:50:07,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:07,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:50:07,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:50:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-30 21:50:07,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-30 21:50:07,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 716 transitions, 16499 flow. Second operand has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:07,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:07,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-30 21:50:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:14,211 INFO L130 PetriNetUnfolder]: 15574/28527 cut-off events. [2023-08-30 21:50:14,211 INFO L131 PetriNetUnfolder]: For 427514/427514 co-relation queries the response was YES. [2023-08-30 21:50:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193308 conditions, 28527 events. 15574/28527 cut-off events. For 427514/427514 co-relation queries the response was YES. Maximal size of possible extension queue 1778. Compared 263712 event pairs, 2041 based on Foata normal form. 18/28545 useless extension candidates. Maximal degree in co-relation 193215. Up to 17584 conditions per place. [2023-08-30 21:50:14,574 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 349 selfloop transitions, 836 changer transitions 0/1185 dead transitions. [2023-08-30 21:50:14,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1185 transitions, 30034 flow [2023-08-30 21:50:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:50:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:50:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-08-30 21:50:14,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029620853080569 [2023-08-30 21:50:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-08-30 21:50:14,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-08-30 21:50:14,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:14,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-08-30 21:50:14,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:14,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:14,578 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:14,578 INFO L175 Difference]: Start difference. First operand has 344 places, 716 transitions, 16499 flow. Second operand 8 states and 849 transitions. [2023-08-30 21:50:14,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1185 transitions, 30034 flow [2023-08-30 21:50:18,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1185 transitions, 28812 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-08-30 21:50:18,115 INFO L231 Difference]: Finished difference. Result has 316 places, 1136 transitions, 29055 flow [2023-08-30 21:50:18,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=15512, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=29055, PETRI_PLACES=316, PETRI_TRANSITIONS=1136} [2023-08-30 21:50:18,116 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 297 predicate places. [2023-08-30 21:50:18,116 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1136 transitions, 29055 flow [2023-08-30 21:50:18,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:18,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:18,117 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:18,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:18,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:18,323 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:18,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash -426818820, now seen corresponding path program 20 times [2023-08-30 21:50:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:18,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052009039] [2023-08-30 21:50:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052009039] [2023-08-30 21:50:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052009039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193388248] [2023-08-30 21:50:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:50:18,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:18,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:18,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:50:19,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:50:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 21:50:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:19,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:19,544 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:50:19,544 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 28 treesize of output 11 [2023-08-30 21:50:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-30 21:50:19,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193388248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:19,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2023-08-30 21:50:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8449676] [2023-08-30 21:50:19,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:19,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 21:50:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 21:50:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 21:50:20,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 211 [2023-08-30 21:50:20,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1136 transitions, 29055 flow. Second operand has 39 states, 39 states have (on average 87.51282051282051) internal successors, (3413), 39 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:20,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:20,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 211 [2023-08-30 21:50:20,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:38,416 INFO L130 PetriNetUnfolder]: 19902/36383 cut-off events. [2023-08-30 21:50:38,416 INFO L131 PetriNetUnfolder]: For 578769/578769 co-relation queries the response was YES. [2023-08-30 21:50:38,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258927 conditions, 36383 events. 19902/36383 cut-off events. For 578769/578769 co-relation queries the response was YES. Maximal size of possible extension queue 2245. Compared 345822 event pairs, 1335 based on Foata normal form. 12/36395 useless extension candidates. Maximal degree in co-relation 258832. Up to 22446 conditions per place. [2023-08-30 21:50:38,893 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 542 selfloop transitions, 1456 changer transitions 653/2651 dead transitions. [2023-08-30 21:50:38,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2651 transitions, 50305 flow [2023-08-30 21:50:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-08-30 21:50:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-08-30 21:50:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 16678 transitions. [2023-08-30 21:50:38,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44656866682732216 [2023-08-30 21:50:38,907 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 16678 transitions. [2023-08-30 21:50:38,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 16678 transitions. [2023-08-30 21:50:38,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:38,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 16678 transitions. [2023-08-30 21:50:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 94.22598870056497) internal successors, (16678), 177 states have internal predecessors, (16678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:38,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:38,962 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:38,962 INFO L175 Difference]: Start difference. First operand has 316 places, 1136 transitions, 29055 flow. Second operand 177 states and 16678 transitions. [2023-08-30 21:50:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 2651 transitions, 50305 flow [2023-08-30 21:50:44,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 2651 transitions, 47827 flow, removed 1239 selfloop flow, removed 1 redundant places. [2023-08-30 21:50:44,805 INFO L231 Difference]: Finished difference. Result has 504 places, 1492 transitions, 40548 flow [2023-08-30 21:50:44,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=27711, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=40548, PETRI_PLACES=504, PETRI_TRANSITIONS=1492} [2023-08-30 21:50:44,807 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 485 predicate places. [2023-08-30 21:50:44,807 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1492 transitions, 40548 flow [2023-08-30 21:50:44,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 87.51282051282051) internal successors, (3413), 39 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:44,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:44,808 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:44,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:45,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 21:50:45,015 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:45,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash -496420982, now seen corresponding path program 21 times [2023-08-30 21:50:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:45,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883337748] [2023-08-30 21:50:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 21:50:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883337748] [2023-08-30 21:50:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883337748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973325369] [2023-08-30 21:50:45,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:50:45,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:45,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:45,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:50:45,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 21:50:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 21:50:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:46,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:50:46,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:46,369 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 17 treesize of output 10 [2023-08-30 21:50:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 21:50:46,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:46,617 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 21:50:46,617 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 28 treesize of output 11 [2023-08-30 21:50:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 21:50:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973325369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:46,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-30 21:50:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566158308] [2023-08-30 21:50:46,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:46,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 21:50:46,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 21:50:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 21:50:48,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 211 [2023-08-30 21:50:48,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1492 transitions, 40548 flow. Second operand has 44 states, 44 states have (on average 80.61363636363636) internal successors, (3547), 44 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:48,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:48,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 211 [2023-08-30 21:50:48,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:17,846 INFO L130 PetriNetUnfolder]: 198537/362673 cut-off events. [2023-08-30 21:54:17,846 INFO L131 PetriNetUnfolder]: For 5986395/5986395 co-relation queries the response was YES. [2023-08-30 21:54:25,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619874 conditions, 362673 events. 198537/362673 cut-off events. For 5986395/5986395 co-relation queries the response was YES. Maximal size of possible extension queue 14513. Compared 4386026 event pairs, 24718 based on Foata normal form. 71/362744 useless extension candidates. Maximal degree in co-relation 2619766. Up to 224697 conditions per place. [2023-08-30 21:54:26,490 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 4088 selfloop transitions, 13084 changer transitions 978/18150 dead transitions. [2023-08-30 21:54:26,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 957 places, 18150 transitions, 477489 flow [2023-08-30 21:54:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2023-08-30 21:54:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2023-08-30 21:54:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 39657 transitions. [2023-08-30 21:54:26,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139820865607449 [2023-08-30 21:54:26,568 INFO L72 ComplementDD]: Start complementDD. Operand 454 states and 39657 transitions. [2023-08-30 21:54:26,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 454 states and 39657 transitions. [2023-08-30 21:54:26,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:26,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 454 states and 39657 transitions. [2023-08-30 21:54:26,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 455 states, 454 states have (on average 87.35022026431719) internal successors, (39657), 454 states have internal predecessors, (39657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:26,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 455 states, 455 states have (on average 211.0) internal successors, (96005), 455 states have internal predecessors, (96005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:26,779 INFO L81 ComplementDD]: Finished complementDD. Result has 455 states, 455 states have (on average 211.0) internal successors, (96005), 455 states have internal predecessors, (96005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:26,780 INFO L175 Difference]: Start difference. First operand has 504 places, 1492 transitions, 40548 flow. Second operand 454 states and 39657 transitions. [2023-08-30 21:54:26,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 957 places, 18150 transitions, 477489 flow Killed by 15