./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --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 21:11:26,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:11:26,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:11:26,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:11:26,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:11:26,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:11:26,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:11:26,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:11:26,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:11:26,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:11:26,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:11:26,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:11:26,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:11:26,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:11:26,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:11:26,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:11:26,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:11:26,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:11:26,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:11:26,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:11:26,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:11:26,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:11:26,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:11:26,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:11:26,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:11:26,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:11:26,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:11:26,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:11:26,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:11:26,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:11:26,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:11:26,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:11:26,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:11:26,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:11:26,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:11:26,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:11:26,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:11:26,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:11:26,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:11:26,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:11:26,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:11:26,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:11:26,204 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:11:26,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:11:26,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:11:26,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:11:26,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:11:26,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:11:26,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:11:26,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:11:26,207 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:11:26,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:11:26,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:11:26,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:11:26,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:11:26,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:11:26,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:11:26,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:11:26,211 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:11:26,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:11:26,211 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:11:26,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:11:26,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:11:26,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:11:26,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:11:26,457 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:11:26,457 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:11:26,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 21:11:27,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:11:27,445 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:11:27,445 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 21:11:27,452 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9db45995e/209cf2f06ae34e42a4260a044a49c9e4/FLAG95319444b [2023-08-30 21:11:27,466 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9db45995e/209cf2f06ae34e42a4260a044a49c9e4 [2023-08-30 21:11:27,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:11:27,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:11:27,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:11:27,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:11:27,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:11:27,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197d45a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27, skipping insertion in model container [2023-08-30 21:11:27,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:11:27,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:11:27,636 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 21:11:27,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:11:27,650 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:11:27,677 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 21:11:27,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:11:27,685 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:11:27,685 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:11:27,689 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:11:27,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27 WrapperNode [2023-08-30 21:11:27,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:11:27,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:11:27,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:11:27,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:11:27,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,721 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-30 21:11:27,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:11:27,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:11:27,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:11:27,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:11:27,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:11:27,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:11:27,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:11:27,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:11:27,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (1/1) ... [2023-08-30 21:11:27,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:11:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:27,813 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 21:11:27,817 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 21:11:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:11:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:11:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:11:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:11:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:11:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:11:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:11:27,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:11:27,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:11:27,839 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 21:11:27,907 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:11:27,908 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:11:28,088 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:11:28,117 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:11:28,117 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:11:28,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:11:28 BoogieIcfgContainer [2023-08-30 21:11:28,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:11:28,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:11:28,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:11:28,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:11:28,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:11:27" (1/3) ... [2023-08-30 21:11:28,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c76f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:11:28, skipping insertion in model container [2023-08-30 21:11:28,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:11:27" (2/3) ... [2023-08-30 21:11:28,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c76f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:11:28, skipping insertion in model container [2023-08-30 21:11:28,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:11:28" (3/3) ... [2023-08-30 21:11:28,123 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-30 21:11:28,128 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:11:28,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:11:28,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:11:28,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:11:28,183 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 21:11:28,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 94 transitions, 212 flow [2023-08-30 21:11:28,256 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2023-08-30 21:11:28,257 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:11:28,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 7/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-30 21:11:28,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 94 transitions, 212 flow [2023-08-30 21:11:28,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 81 transitions, 180 flow [2023-08-30 21:11:28,268 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:11:28,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-30 21:11:28,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-30 21:11:28,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 81 transitions, 180 flow [2023-08-30 21:11:28,308 INFO L130 PetriNetUnfolder]: 7/81 cut-off events. [2023-08-30 21:11:28,308 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:11:28,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 7/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-30 21:11:28,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2023-08-30 21:11:30,163 INFO L134 LiptonReduction]: Checked pairs total: 1280 [2023-08-30 21:11:30,163 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-30 21:11:30,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:11:30,176 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;@4b027c77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:11:30,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 21:11:30,179 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2023-08-30 21:11:30,180 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:11:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:30,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:30,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:30,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201439, now seen corresponding path program 1 times [2023-08-30 21:11:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:30,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855692472] [2023-08-30 21:11:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:30,622 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 21:11:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855692472] [2023-08-30 21:11:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855692472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:30,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:11:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017090723] [2023-08-30 21:11:30,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:30,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:11:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:11:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:11:30,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-30 21:11:30,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 21:11:30,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:30,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-30 21:11:30,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:30,758 INFO L130 PetriNetUnfolder]: 271/426 cut-off events. [2023-08-30 21:11:30,759 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-30 21:11:30,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 426 events. 271/426 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1528 event pairs, 37 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 671. Up to 309 conditions per place. [2023-08-30 21:11:30,764 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-30 21:11:30,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 181 flow [2023-08-30 21:11:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:11:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:11:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-08-30 21:11:30,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822784810126582 [2023-08-30 21:11:30,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-08-30 21:11:30,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-08-30 21:11:30,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:30,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-08-30 21:11:30,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 21:11:30,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 21:11:30,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 21:11:30,791 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 276 transitions. [2023-08-30 21:11:30,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 181 flow [2023-08-30 21:11:30,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 21:11:30,794 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-08-30 21:11:30,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 21:11:30,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 21:11:30,799 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-08-30 21:11:30,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 21:11:30,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:30,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:30,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:11:30,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:30,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1511050058, now seen corresponding path program 1 times [2023-08-30 21:11:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227444066] [2023-08-30 21:11:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:31,030 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 21:11:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227444066] [2023-08-30 21:11:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227444066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859288165] [2023-08-30 21:11:31,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:31,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:11:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:11:31,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:11:31,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:31,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 21:11:31,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:31,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:31,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:31,204 INFO L130 PetriNetUnfolder]: 359/564 cut-off events. [2023-08-30 21:11:31,204 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 21:11:31,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 564 events. 359/564 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2260 event pairs, 27 based on Foata normal form. 28/584 useless extension candidates. Maximal degree in co-relation 257. Up to 227 conditions per place. [2023-08-30 21:11:31,207 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 62 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2023-08-30 21:11:31,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 359 flow [2023-08-30 21:11:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:11:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:11:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 571 transitions. [2023-08-30 21:11:31,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162748643761302 [2023-08-30 21:11:31,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 571 transitions. [2023-08-30 21:11:31,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 571 transitions. [2023-08-30 21:11:31,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:31,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 571 transitions. [2023-08-30 21:11:31,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 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 21:11:31,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:31,215 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:31,215 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 571 transitions. [2023-08-30 21:11:31,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 359 flow [2023-08-30 21:11:31,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 76 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:11:31,217 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 154 flow [2023-08-30 21:11:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-30 21:11:31,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-30 21:11:31,218 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 154 flow [2023-08-30 21:11:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 21:11:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:11:31,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:31,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -799973884, now seen corresponding path program 2 times [2023-08-30 21:11:31,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:31,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461081077] [2023-08-30 21:11:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:31,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:31,364 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 21:11:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461081077] [2023-08-30 21:11:31,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461081077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:31,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:31,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:31,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856626379] [2023-08-30 21:11:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:31,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:31,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:31,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 21:11:31,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:31,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:31,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:31,535 INFO L130 PetriNetUnfolder]: 611/948 cut-off events. [2023-08-30 21:11:31,535 INFO L131 PetriNetUnfolder]: For 559/563 co-relation queries the response was YES. [2023-08-30 21:11:31,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 948 events. 611/948 cut-off events. For 559/563 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4132 event pairs, 21 based on Foata normal form. 16/956 useless extension candidates. Maximal degree in co-relation 1764. Up to 348 conditions per place. [2023-08-30 21:11:31,539 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 67 selfloop transitions, 15 changer transitions 3/87 dead transitions. [2023-08-30 21:11:31,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 87 transitions, 485 flow [2023-08-30 21:11:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:11:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:11:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 507 transitions. [2023-08-30 21:11:31,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348101265822784 [2023-08-30 21:11:31,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 507 transitions. [2023-08-30 21:11:31,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 507 transitions. [2023-08-30 21:11:31,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:31,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 507 transitions. [2023-08-30 21:11:31,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 21:11:31,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:31,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:31,544 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 154 flow. Second operand 6 states and 507 transitions. [2023-08-30 21:11:31,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 87 transitions, 485 flow [2023-08-30 21:11:31,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 87 transitions, 485 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 21:11:31,559 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 241 flow [2023-08-30 21:11:31,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-30 21:11:31,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-30 21:11:31,560 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 241 flow [2023-08-30 21:11:31,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 21:11:31,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:31,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:31,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:11:31,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:31,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1319449030, now seen corresponding path program 3 times [2023-08-30 21:11:31,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:31,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119361310] [2023-08-30 21:11:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:31,661 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 21:11:31,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119361310] [2023-08-30 21:11:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119361310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:31,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:31,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87688453] [2023-08-30 21:11:31,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:31,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 158 [2023-08-30 21:11:31,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 21:11:31,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:31,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 158 [2023-08-30 21:11:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:31,823 INFO L130 PetriNetUnfolder]: 720/1115 cut-off events. [2023-08-30 21:11:31,824 INFO L131 PetriNetUnfolder]: For 1716/1720 co-relation queries the response was YES. [2023-08-30 21:11:31,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 1115 events. 720/1115 cut-off events. For 1716/1720 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5026 event pairs, 107 based on Foata normal form. 28/1127 useless extension candidates. Maximal degree in co-relation 2582. Up to 799 conditions per place. [2023-08-30 21:11:31,829 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 57 selfloop transitions, 15 changer transitions 3/77 dead transitions. [2023-08-30 21:11:31,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 552 flow [2023-08-30 21:11:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:11:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:11:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 492 transitions. [2023-08-30 21:11:31,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189873417721519 [2023-08-30 21:11:31,841 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 492 transitions. [2023-08-30 21:11:31,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 492 transitions. [2023-08-30 21:11:31,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:31,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 492 transitions. [2023-08-30 21:11:31,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 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 21:11:31,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:31,844 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:31,844 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 241 flow. Second operand 6 states and 492 transitions. [2023-08-30 21:11:31,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 552 flow [2023-08-30 21:11:31,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 534 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 21:11:31,848 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 335 flow [2023-08-30 21:11:31,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-30 21:11:31,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-30 21:11:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 335 flow [2023-08-30 21:11:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 21:11:31,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:31,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:11:31,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:31,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1917135791, now seen corresponding path program 1 times [2023-08-30 21:11:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810208765] [2023-08-30 21:11:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:31,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:31,977 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 21:11:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:31,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810208765] [2023-08-30 21:11:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810208765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:31,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040891885] [2023-08-30 21:11:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:32,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:32,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 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 21:11:32,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:32,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:32,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:32,168 INFO L130 PetriNetUnfolder]: 827/1278 cut-off events. [2023-08-30 21:11:32,168 INFO L131 PetriNetUnfolder]: For 3130/3142 co-relation queries the response was YES. [2023-08-30 21:11:32,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1278 events. 827/1278 cut-off events. For 3130/3142 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5962 event pairs, 137 based on Foata normal form. 36/1306 useless extension candidates. Maximal degree in co-relation 3377. Up to 931 conditions per place. [2023-08-30 21:11:32,175 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 67 selfloop transitions, 12 changer transitions 3/84 dead transitions. [2023-08-30 21:11:32,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 643 flow [2023-08-30 21:11:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-30 21:11:32,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265822784810127 [2023-08-30 21:11:32,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-30 21:11:32,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-30 21:11:32,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:32,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-30 21:11:32,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 21:11:32,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:32,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:32,179 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 335 flow. Second operand 5 states and 416 transitions. [2023-08-30 21:11:32,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 643 flow [2023-08-30 21:11:32,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 619 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 21:11:32,187 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 374 flow [2023-08-30 21:11:32,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-30 21:11:32,188 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-08-30 21:11:32,188 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 374 flow [2023-08-30 21:11:32,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 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 21:11:32,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:32,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:11:32,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:32,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1641037523, now seen corresponding path program 1 times [2023-08-30 21:11:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:32,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79028772] [2023-08-30 21:11:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:32,307 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 21:11:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79028772] [2023-08-30 21:11:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79028772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542577183] [2023-08-30 21:11:32,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:32,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:32,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 158 [2023-08-30 21:11:32,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 21:11:32,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:32,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 158 [2023-08-30 21:11:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:32,559 INFO L130 PetriNetUnfolder]: 1371/2164 cut-off events. [2023-08-30 21:11:32,559 INFO L131 PetriNetUnfolder]: For 6590/6590 co-relation queries the response was YES. [2023-08-30 21:11:32,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8420 conditions, 2164 events. 1371/2164 cut-off events. For 6590/6590 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10432 event pairs, 442 based on Foata normal form. 44/2208 useless extension candidates. Maximal degree in co-relation 5887. Up to 1202 conditions per place. [2023-08-30 21:11:32,571 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 76 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2023-08-30 21:11:32,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 812 flow [2023-08-30 21:11:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-08-30 21:11:32,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392405063291139 [2023-08-30 21:11:32,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-08-30 21:11:32,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-08-30 21:11:32,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:32,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-08-30 21:11:32,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 21:11:32,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:32,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:32,575 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 374 flow. Second operand 5 states and 426 transitions. [2023-08-30 21:11:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 812 flow [2023-08-30 21:11:32,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 101 transitions, 795 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 21:11:32,608 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 505 flow [2023-08-30 21:11:32,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-30 21:11:32,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2023-08-30 21:11:32,608 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 505 flow [2023-08-30 21:11:32,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 21:11:32,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:32,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:32,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:11:32,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:32,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash -545409011, now seen corresponding path program 2 times [2023-08-30 21:11:32,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:32,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279423915] [2023-08-30 21:11:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:32,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:32,768 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 21:11:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279423915] [2023-08-30 21:11:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279423915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:32,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706414084] [2023-08-30 21:11:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:32,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 158 [2023-08-30 21:11:32,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 21:11:32,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:32,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 158 [2023-08-30 21:11:32,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:33,114 INFO L130 PetriNetUnfolder]: 1871/2949 cut-off events. [2023-08-30 21:11:33,114 INFO L131 PetriNetUnfolder]: For 15366/15366 co-relation queries the response was YES. [2023-08-30 21:11:33,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13298 conditions, 2949 events. 1871/2949 cut-off events. For 15366/15366 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15469 event pairs, 317 based on Foata normal form. 34/2983 useless extension candidates. Maximal degree in co-relation 10734. Up to 1315 conditions per place. [2023-08-30 21:11:33,130 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 93 selfloop transitions, 41 changer transitions 3/137 dead transitions. [2023-08-30 21:11:33,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 137 transitions, 1422 flow [2023-08-30 21:11:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2023-08-30 21:11:33,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341772151898734 [2023-08-30 21:11:33,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 422 transitions. [2023-08-30 21:11:33,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 422 transitions. [2023-08-30 21:11:33,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:33,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 422 transitions. [2023-08-30 21:11:33,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 21:11:33,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:33,135 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:33,135 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 505 flow. Second operand 5 states and 422 transitions. [2023-08-30 21:11:33,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 137 transitions, 1422 flow [2023-08-30 21:11:33,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 137 transitions, 1351 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-30 21:11:33,171 INFO L231 Difference]: Finished difference. Result has 65 places, 88 transitions, 964 flow [2023-08-30 21:11:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=65, PETRI_TRANSITIONS=88} [2023-08-30 21:11:33,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-08-30 21:11:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 88 transitions, 964 flow [2023-08-30 21:11:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 21:11:33,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:33,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:11:33,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:33,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1376247327, now seen corresponding path program 3 times [2023-08-30 21:11:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146713480] [2023-08-30 21:11:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:33,303 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 21:11:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:33,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146713480] [2023-08-30 21:11:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146713480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:33,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331502762] [2023-08-30 21:11:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:33,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:33,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:33,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 88 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:33,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:33,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:33,630 INFO L130 PetriNetUnfolder]: 1929/3099 cut-off events. [2023-08-30 21:11:33,630 INFO L131 PetriNetUnfolder]: For 17013/17013 co-relation queries the response was YES. [2023-08-30 21:11:33,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14898 conditions, 3099 events. 1929/3099 cut-off events. For 17013/17013 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16505 event pairs, 531 based on Foata normal form. 34/3133 useless extension candidates. Maximal degree in co-relation 13299. Up to 1594 conditions per place. [2023-08-30 21:11:33,654 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 88 selfloop transitions, 64 changer transitions 7/159 dead transitions. [2023-08-30 21:11:33,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 159 transitions, 1771 flow [2023-08-30 21:11:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:11:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:11:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 500 transitions. [2023-08-30 21:11:33,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274261603375527 [2023-08-30 21:11:33,656 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 500 transitions. [2023-08-30 21:11:33,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 500 transitions. [2023-08-30 21:11:33,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:33,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 500 transitions. [2023-08-30 21:11:33,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 21:11:33,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:33,659 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:33,659 INFO L175 Difference]: Start difference. First operand has 65 places, 88 transitions, 964 flow. Second operand 6 states and 500 transitions. [2023-08-30 21:11:33,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 159 transitions, 1771 flow [2023-08-30 21:11:33,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 159 transitions, 1767 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 21:11:33,687 INFO L231 Difference]: Finished difference. Result has 73 places, 101 transitions, 1323 flow [2023-08-30 21:11:33,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1323, PETRI_PLACES=73, PETRI_TRANSITIONS=101} [2023-08-30 21:11:33,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-30 21:11:33,688 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 101 transitions, 1323 flow [2023-08-30 21:11:33,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:33,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:33,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:11:33,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:33,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash 973413535, now seen corresponding path program 4 times [2023-08-30 21:11:33,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:33,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438639527] [2023-08-30 21:11:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:33,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438639527] [2023-08-30 21:11:33,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438639527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264119519] [2023-08-30 21:11:33,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:11:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:33,823 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 21:11:33,830 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 21:11:33,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:11:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:11:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:11:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:11:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:34,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:11:34,275 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 21:11:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264119519] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:34,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:11:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-08-30 21:11:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777876735] [2023-08-30 21:11:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:11:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:11:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:11:34,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:11:34,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 101 transitions, 1323 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 21:11:34,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:34,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:11:34,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:34,858 INFO L130 PetriNetUnfolder]: 3324/5413 cut-off events. [2023-08-30 21:11:34,858 INFO L131 PetriNetUnfolder]: For 37544/37544 co-relation queries the response was YES. [2023-08-30 21:11:34,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28927 conditions, 5413 events. 3324/5413 cut-off events. For 37544/37544 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33023 event pairs, 277 based on Foata normal form. 28/5441 useless extension candidates. Maximal degree in co-relation 25775. Up to 1702 conditions per place. [2023-08-30 21:11:34,890 INFO L137 encePairwiseOnDemand]: 146/158 looper letters, 127 selfloop transitions, 136 changer transitions 2/265 dead transitions. [2023-08-30 21:11:34,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 265 transitions, 3532 flow [2023-08-30 21:11:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:11:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:11:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 568 transitions. [2023-08-30 21:11:34,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135623869801085 [2023-08-30 21:11:34,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 568 transitions. [2023-08-30 21:11:34,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 568 transitions. [2023-08-30 21:11:34,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:34,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 568 transitions. [2023-08-30 21:11:34,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.14285714285714) internal successors, (568), 7 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 21:11:34,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:34,895 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:34,895 INFO L175 Difference]: Start difference. First operand has 73 places, 101 transitions, 1323 flow. Second operand 7 states and 568 transitions. [2023-08-30 21:11:34,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 265 transitions, 3532 flow [2023-08-30 21:11:34,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 265 transitions, 3500 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 21:11:34,962 INFO L231 Difference]: Finished difference. Result has 85 places, 183 transitions, 3047 flow [2023-08-30 21:11:34,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=85, PETRI_TRANSITIONS=183} [2023-08-30 21:11:34,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-30 21:11:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 183 transitions, 3047 flow [2023-08-30 21:11:34,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 21:11:34,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:34,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:34,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:11:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:35,169 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:35,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1585474959, now seen corresponding path program 5 times [2023-08-30 21:11:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074437609] [2023-08-30 21:11:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:35,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:35,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074437609] [2023-08-30 21:11:35,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074437609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:35,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927737542] [2023-08-30 21:11:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:11:35,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:35,312 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 21:11:35,314 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 21:11:35,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:11:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:11:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:11:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:11:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:35,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:11:35,599 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 21:11:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927737542] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:35,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:11:35,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-08-30 21:11:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557253621] [2023-08-30 21:11:35,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 21:11:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 21:11:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:11:35,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:11:35,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 183 transitions, 3047 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 21:11:35,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:35,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:11:35,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:36,316 INFO L130 PetriNetUnfolder]: 3349/5466 cut-off events. [2023-08-30 21:11:36,317 INFO L131 PetriNetUnfolder]: For 55661/55661 co-relation queries the response was YES. [2023-08-30 21:11:36,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 5466 events. 3349/5466 cut-off events. For 55661/55661 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33333 event pairs, 303 based on Foata normal form. 6/5472 useless extension candidates. Maximal degree in co-relation 31704. Up to 1723 conditions per place. [2023-08-30 21:11:36,360 INFO L137 encePairwiseOnDemand]: 146/158 looper letters, 134 selfloop transitions, 138 changer transitions 1/273 dead transitions. [2023-08-30 21:11:36,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 273 transitions, 4236 flow [2023-08-30 21:11:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:11:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:11:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 568 transitions. [2023-08-30 21:11:36,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135623869801085 [2023-08-30 21:11:36,363 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 568 transitions. [2023-08-30 21:11:36,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 568 transitions. [2023-08-30 21:11:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 568 transitions. [2023-08-30 21:11:36,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.14285714285714) internal successors, (568), 7 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 21:11:36,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:36,366 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 21:11:36,366 INFO L175 Difference]: Start difference. First operand has 85 places, 183 transitions, 3047 flow. Second operand 7 states and 568 transitions. [2023-08-30 21:11:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 273 transitions, 4236 flow [2023-08-30 21:11:36,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 273 transitions, 4166 flow, removed 35 selfloop flow, removed 0 redundant places. [2023-08-30 21:11:36,480 INFO L231 Difference]: Finished difference. Result has 95 places, 192 transitions, 3560 flow [2023-08-30 21:11:36,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3560, PETRI_PLACES=95, PETRI_TRANSITIONS=192} [2023-08-30 21:11:36,481 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2023-08-30 21:11:36,481 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 192 transitions, 3560 flow [2023-08-30 21:11:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 21:11:36,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:36,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:36,488 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 21:11:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 21:11:36,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:36,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1185746017, now seen corresponding path program 6 times [2023-08-30 21:11:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100527912] [2023-08-30 21:11:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:36,824 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 21:11:36,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100527912] [2023-08-30 21:11:36,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100527912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:36,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:36,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986122905] [2023-08-30 21:11:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:36,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:36,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:36,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:36,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 192 transitions, 3560 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:36,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:36,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:36,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:37,540 INFO L130 PetriNetUnfolder]: 4117/6586 cut-off events. [2023-08-30 21:11:37,541 INFO L131 PetriNetUnfolder]: For 90626/90626 co-relation queries the response was YES. [2023-08-30 21:11:37,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46083 conditions, 6586 events. 4117/6586 cut-off events. For 90626/90626 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39769 event pairs, 1187 based on Foata normal form. 76/6662 useless extension candidates. Maximal degree in co-relation 42863. Up to 2754 conditions per place. [2023-08-30 21:11:37,593 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 144 selfloop transitions, 147 changer transitions 3/294 dead transitions. [2023-08-30 21:11:37,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 294 transitions, 5553 flow [2023-08-30 21:11:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-08-30 21:11:37,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392405063291139 [2023-08-30 21:11:37,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-08-30 21:11:37,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-08-30 21:11:37,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:37,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-08-30 21:11:37,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 21:11:37,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:37,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:37,597 INFO L175 Difference]: Start difference. First operand has 95 places, 192 transitions, 3560 flow. Second operand 5 states and 426 transitions. [2023-08-30 21:11:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 294 transitions, 5553 flow [2023-08-30 21:11:37,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 294 transitions, 5414 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 21:11:37,778 INFO L231 Difference]: Finished difference. Result has 99 places, 220 transitions, 4429 flow [2023-08-30 21:11:37,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4429, PETRI_PLACES=99, PETRI_TRANSITIONS=220} [2023-08-30 21:11:37,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2023-08-30 21:11:37,779 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 220 transitions, 4429 flow [2023-08-30 21:11:37,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:37,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:37,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:37,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 21:11:37,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:37,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1922814251, now seen corresponding path program 7 times [2023-08-30 21:11:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:37,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93909367] [2023-08-30 21:11:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:37,898 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 21:11:37,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:37,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93909367] [2023-08-30 21:11:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93909367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:37,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:37,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:11:37,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909572452] [2023-08-30 21:11:37,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:37,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:37,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 220 transitions, 4429 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:37,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:37,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:37,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:38,754 INFO L130 PetriNetUnfolder]: 4706/7365 cut-off events. [2023-08-30 21:11:38,755 INFO L131 PetriNetUnfolder]: For 108974/108974 co-relation queries the response was YES. [2023-08-30 21:11:38,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53563 conditions, 7365 events. 4706/7365 cut-off events. For 108974/108974 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44302 event pairs, 759 based on Foata normal form. 136/7501 useless extension candidates. Maximal degree in co-relation 51296. Up to 2640 conditions per place. [2023-08-30 21:11:38,811 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 208 selfloop transitions, 162 changer transitions 5/375 dead transitions. [2023-08-30 21:11:38,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 375 transitions, 7528 flow [2023-08-30 21:11:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:11:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:11:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2023-08-30 21:11:38,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-30 21:11:38,813 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2023-08-30 21:11:38,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2023-08-30 21:11:38,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:38,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2023-08-30 21:11:38,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 21:11:38,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:38,816 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:38,816 INFO L175 Difference]: Start difference. First operand has 99 places, 220 transitions, 4429 flow. Second operand 6 states and 502 transitions. [2023-08-30 21:11:38,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 375 transitions, 7528 flow [2023-08-30 21:11:39,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 375 transitions, 7520 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 21:11:39,005 INFO L231 Difference]: Finished difference. Result has 106 places, 267 transitions, 5963 flow [2023-08-30 21:11:39,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5963, PETRI_PLACES=106, PETRI_TRANSITIONS=267} [2023-08-30 21:11:39,005 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2023-08-30 21:11:39,005 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 267 transitions, 5963 flow [2023-08-30 21:11:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 21:11:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:39,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 21:11:39,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:39,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1820462595, now seen corresponding path program 8 times [2023-08-30 21:11:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578961586] [2023-08-30 21:11:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:39,119 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 21:11:39,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:39,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578961586] [2023-08-30 21:11:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578961586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:39,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632898536] [2023-08-30 21:11:39,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:39,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:39,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 158 [2023-08-30 21:11:39,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 267 transitions, 5963 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 21:11:39,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:39,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 158 [2023-08-30 21:11:39,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:40,061 INFO L130 PetriNetUnfolder]: 4982/7784 cut-off events. [2023-08-30 21:11:40,061 INFO L131 PetriNetUnfolder]: For 137216/137242 co-relation queries the response was YES. [2023-08-30 21:11:40,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59917 conditions, 7784 events. 4982/7784 cut-off events. For 137216/137242 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 46393 event pairs, 935 based on Foata normal form. 254/8038 useless extension candidates. Maximal degree in co-relation 57277. Up to 5784 conditions per place. [2023-08-30 21:11:40,138 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 177 selfloop transitions, 29 changer transitions 0/336 dead transitions. [2023-08-30 21:11:40,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 336 transitions, 7345 flow [2023-08-30 21:11:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-08-30 21:11:40,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240506329113924 [2023-08-30 21:11:40,139 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-08-30 21:11:40,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-08-30 21:11:40,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:40,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-08-30 21:11:40,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 21:11:40,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:40,142 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:40,142 INFO L175 Difference]: Start difference. First operand has 106 places, 267 transitions, 5963 flow. Second operand 5 states and 414 transitions. [2023-08-30 21:11:40,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 336 transitions, 7345 flow [2023-08-30 21:11:40,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 336 transitions, 7063 flow, removed 32 selfloop flow, removed 2 redundant places. [2023-08-30 21:11:40,369 INFO L231 Difference]: Finished difference. Result has 110 places, 277 transitions, 5992 flow [2023-08-30 21:11:40,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5992, PETRI_PLACES=110, PETRI_TRANSITIONS=277} [2023-08-30 21:11:40,370 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2023-08-30 21:11:40,370 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 277 transitions, 5992 flow [2023-08-30 21:11:40,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 21:11:40,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:40,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:40,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 21:11:40,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:40,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash -584129719, now seen corresponding path program 9 times [2023-08-30 21:11:40,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:40,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690180824] [2023-08-30 21:11:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:40,446 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 21:11:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:40,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690180824] [2023-08-30 21:11:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690180824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:40,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:40,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580147950] [2023-08-30 21:11:40,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:40,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:40,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:40,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 158 [2023-08-30 21:11:40,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 277 transitions, 5992 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 21:11:40,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:40,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 158 [2023-08-30 21:11:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:41,301 INFO L130 PetriNetUnfolder]: 4967/7752 cut-off events. [2023-08-30 21:11:41,301 INFO L131 PetriNetUnfolder]: For 131669/131702 co-relation queries the response was YES. [2023-08-30 21:11:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59769 conditions, 7752 events. 4967/7752 cut-off events. For 131669/131702 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 46060 event pairs, 965 based on Foata normal form. 28/7775 useless extension candidates. Maximal degree in co-relation 57117. Up to 6682 conditions per place. [2023-08-30 21:11:41,419 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 157 selfloop transitions, 19 changer transitions 2/308 dead transitions. [2023-08-30 21:11:41,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 308 transitions, 6595 flow [2023-08-30 21:11:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:11:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:11:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 410 transitions. [2023-08-30 21:11:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189873417721519 [2023-08-30 21:11:41,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 410 transitions. [2023-08-30 21:11:41,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 410 transitions. [2023-08-30 21:11:41,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:41,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 410 transitions. [2023-08-30 21:11:41,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 21:11:41,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:41,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 21:11:41,428 INFO L175 Difference]: Start difference. First operand has 110 places, 277 transitions, 5992 flow. Second operand 5 states and 410 transitions. [2023-08-30 21:11:41,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 308 transitions, 6595 flow [2023-08-30 21:11:41,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 308 transitions, 6510 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-08-30 21:11:41,635 INFO L231 Difference]: Finished difference. Result has 115 places, 280 transitions, 6024 flow [2023-08-30 21:11:41,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6024, PETRI_PLACES=115, PETRI_TRANSITIONS=280} [2023-08-30 21:11:41,635 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-08-30 21:11:41,636 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 280 transitions, 6024 flow [2023-08-30 21:11:41,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 21:11:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:41,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:41,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 21:11:41,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:41,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1091778279, now seen corresponding path program 10 times [2023-08-30 21:11:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474827800] [2023-08-30 21:11:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:41,734 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 21:11:41,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:41,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474827800] [2023-08-30 21:11:41,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474827800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:11:41,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:11:41,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:11:41,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772962985] [2023-08-30 21:11:41,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:11:41,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:11:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:41,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:11:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:11:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 158 [2023-08-30 21:11:41,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 280 transitions, 6024 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 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 21:11:41,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:41,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 158 [2023-08-30 21:11:41,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:42,787 INFO L130 PetriNetUnfolder]: 5148/8062 cut-off events. [2023-08-30 21:11:42,787 INFO L131 PetriNetUnfolder]: For 135125/135151 co-relation queries the response was YES. [2023-08-30 21:11:42,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61793 conditions, 8062 events. 5148/8062 cut-off events. For 135125/135151 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48538 event pairs, 991 based on Foata normal form. 16/8078 useless extension candidates. Maximal degree in co-relation 59129. Up to 6657 conditions per place. [2023-08-30 21:11:42,853 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 165 selfloop transitions, 23 changer transitions 4/319 dead transitions. [2023-08-30 21:11:42,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 319 transitions, 6776 flow [2023-08-30 21:11:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:11:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:11:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-08-30 21:11:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116033755274262 [2023-08-30 21:11:42,855 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-08-30 21:11:42,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-08-30 21:11:42,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:42,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-08-30 21:11:42,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 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 21:11:42,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:42,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 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 21:11:42,858 INFO L175 Difference]: Start difference. First operand has 115 places, 280 transitions, 6024 flow. Second operand 6 states and 485 transitions. [2023-08-30 21:11:42,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 319 transitions, 6776 flow [2023-08-30 21:11:43,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 319 transitions, 6636 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-30 21:11:43,196 INFO L231 Difference]: Finished difference. Result has 113 places, 278 transitions, 5899 flow [2023-08-30 21:11:43,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=5743, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5899, PETRI_PLACES=113, PETRI_TRANSITIONS=278} [2023-08-30 21:11:43,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2023-08-30 21:11:43,196 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 278 transitions, 5899 flow [2023-08-30 21:11:43,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 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 21:11:43,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:43,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 21:11:43,197 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:43,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1354222880, now seen corresponding path program 1 times [2023-08-30 21:11:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:43,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992628580] [2023-08-30 21:11:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992628580] [2023-08-30 21:11:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992628580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635222168] [2023-08-30 21:11:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:43,386 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 21:11:43,388 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 21:11:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:11:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:11:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:43,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:11:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:43,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635222168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:11:43,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:11:43,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 21:11:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901220707] [2023-08-30 21:11:43,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:11:43,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:11:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:11:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:11:43,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2023-08-30 21:11:43,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 278 transitions, 5899 flow. Second operand has 12 states, 12 states have (on average 72.0) internal successors, (864), 12 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 21:11:43,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:43,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2023-08-30 21:11:43,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:45,512 INFO L130 PetriNetUnfolder]: 6602/10992 cut-off events. [2023-08-30 21:11:45,512 INFO L131 PetriNetUnfolder]: For 172324/173203 co-relation queries the response was YES. [2023-08-30 21:11:45,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84140 conditions, 10992 events. 6602/10992 cut-off events. For 172324/173203 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 78694 event pairs, 292 based on Foata normal form. 525/11517 useless extension candidates. Maximal degree in co-relation 80915. Up to 5995 conditions per place. [2023-08-30 21:11:45,591 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 459 selfloop transitions, 180 changer transitions 6/662 dead transitions. [2023-08-30 21:11:45,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 662 transitions, 14683 flow [2023-08-30 21:11:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:11:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:11:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 707 transitions. [2023-08-30 21:11:45,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971870604781997 [2023-08-30 21:11:45,594 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 707 transitions. [2023-08-30 21:11:45,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 707 transitions. [2023-08-30 21:11:45,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:45,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 707 transitions. [2023-08-30 21:11:45,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.55555555555556) internal successors, (707), 9 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 21:11:45,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 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 21:11:45,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 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 21:11:45,597 INFO L175 Difference]: Start difference. First operand has 113 places, 278 transitions, 5899 flow. Second operand 9 states and 707 transitions. [2023-08-30 21:11:45,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 662 transitions, 14683 flow [2023-08-30 21:11:45,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 662 transitions, 14639 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-30 21:11:45,939 INFO L231 Difference]: Finished difference. Result has 119 places, 434 transitions, 9907 flow [2023-08-30 21:11:45,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=5855, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9907, PETRI_PLACES=119, PETRI_TRANSITIONS=434} [2023-08-30 21:11:45,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2023-08-30 21:11:45,939 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 434 transitions, 9907 flow [2023-08-30 21:11:45,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 72.0) internal successors, (864), 12 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 21:11:45,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:45,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:45,948 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 21:11:46,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:46,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:46,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1627485648, now seen corresponding path program 2 times [2023-08-30 21:11:46,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:46,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155824897] [2023-08-30 21:11:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155824897] [2023-08-30 21:11:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155824897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736191150] [2023-08-30 21:11:46,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:11:46,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:46,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:46,348 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 21:11:46,350 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 21:11:46,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:11:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:11:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:11:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:11:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:46,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:11:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736191150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:11:46,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:11:46,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 21:11:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246907142] [2023-08-30 21:11:46,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:11:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 21:11:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 21:11:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 21:11:46,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:11:46,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 434 transitions, 9907 flow. Second operand has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 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 21:11:46,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:46,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:11:46,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:48,779 INFO L130 PetriNetUnfolder]: 7409/12416 cut-off events. [2023-08-30 21:11:48,779 INFO L131 PetriNetUnfolder]: For 234362/235369 co-relation queries the response was YES. [2023-08-30 21:11:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101539 conditions, 12416 events. 7409/12416 cut-off events. For 234362/235369 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 91760 event pairs, 475 based on Foata normal form. 634/13046 useless extension candidates. Maximal degree in co-relation 98033. Up to 8321 conditions per place. [2023-08-30 21:11:48,863 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 449 selfloop transitions, 198 changer transitions 6/670 dead transitions. [2023-08-30 21:11:48,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 670 transitions, 15897 flow [2023-08-30 21:11:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:11:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:11:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 824 transitions. [2023-08-30 21:11:48,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47410817031070196 [2023-08-30 21:11:48,865 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 824 transitions. [2023-08-30 21:11:48,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 824 transitions. [2023-08-30 21:11:48,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:48,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 824 transitions. [2023-08-30 21:11:48,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 74.9090909090909) internal successors, (824), 11 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 21:11:48,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 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 21:11:48,869 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 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 21:11:48,869 INFO L175 Difference]: Start difference. First operand has 119 places, 434 transitions, 9907 flow. Second operand 11 states and 824 transitions. [2023-08-30 21:11:48,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 670 transitions, 15897 flow [2023-08-30 21:11:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 670 transitions, 15243 flow, removed 266 selfloop flow, removed 2 redundant places. [2023-08-30 21:11:49,500 INFO L231 Difference]: Finished difference. Result has 132 places, 525 transitions, 12087 flow [2023-08-30 21:11:49,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=9368, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12087, PETRI_PLACES=132, PETRI_TRANSITIONS=525} [2023-08-30 21:11:49,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2023-08-30 21:11:49,501 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 525 transitions, 12087 flow [2023-08-30 21:11:49,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 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 21:11:49,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:11:49,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:11:49,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 21:11:49,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:11:49,706 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:11:49,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:11:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2075707194, now seen corresponding path program 1 times [2023-08-30 21:11:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:11:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163720534] [2023-08-30 21:11:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:11:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:11:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163720534] [2023-08-30 21:11:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163720534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:11:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285554264] [2023-08-30 21:11:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:11:49,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:11:49,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:11:49,824 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 21:11:49,826 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 21:11:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:11:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:11:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:11:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:50,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:11:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:11:50,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285554264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:11:50,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:11:50,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-30 21:11:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629045871] [2023-08-30 21:11:50,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:11:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:11:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:11:50,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:11:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:11:50,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:11:50,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 525 transitions, 12087 flow. Second operand has 20 states, 20 states have (on average 68.35) internal successors, (1367), 20 states have internal predecessors, (1367), 0 states have call successors, (0), 0 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 21:11:50,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:11:50,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:11:50,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:58,814 INFO L130 PetriNetUnfolder]: 19787/31764 cut-off events. [2023-08-30 21:11:58,815 INFO L131 PetriNetUnfolder]: For 669075/669075 co-relation queries the response was YES. [2023-08-30 21:11:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257818 conditions, 31764 events. 19787/31764 cut-off events. For 669075/669075 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 243659 event pairs, 727 based on Foata normal form. 1826/33590 useless extension candidates. Maximal degree in co-relation 252851. Up to 8749 conditions per place. [2023-08-30 21:11:59,075 INFO L137 encePairwiseOnDemand]: 147/158 looper letters, 939 selfloop transitions, 1550 changer transitions 0/2489 dead transitions. [2023-08-30 21:11:59,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 2489 transitions, 54202 flow [2023-08-30 21:11:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 21:11:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 21:11:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4326 transitions. [2023-08-30 21:11:59,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889240506329114 [2023-08-30 21:11:59,082 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4326 transitions. [2023-08-30 21:11:59,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4326 transitions. [2023-08-30 21:11:59,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:59,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4326 transitions. [2023-08-30 21:11:59,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 77.25) internal successors, (4326), 56 states have internal predecessors, (4326), 0 states have call successors, (0), 0 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 21:11:59,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 158.0) internal successors, (9006), 57 states have internal predecessors, (9006), 0 states have call successors, (0), 0 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 21:11:59,098 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 158.0) internal successors, (9006), 57 states have internal predecessors, (9006), 0 states have call successors, (0), 0 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 21:11:59,098 INFO L175 Difference]: Start difference. First operand has 132 places, 525 transitions, 12087 flow. Second operand 56 states and 4326 transitions. [2023-08-30 21:11:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 2489 transitions, 54202 flow [2023-08-30 21:12:01,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 2489 transitions, 53798 flow, removed 190 selfloop flow, removed 2 redundant places. [2023-08-30 21:12:01,944 INFO L231 Difference]: Finished difference. Result has 226 places, 1807 transitions, 46098 flow [2023-08-30 21:12:01,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=11789, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=46098, PETRI_PLACES=226, PETRI_TRANSITIONS=1807} [2023-08-30 21:12:01,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2023-08-30 21:12:01,945 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 1807 transitions, 46098 flow [2023-08-30 21:12:01,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.35) internal successors, (1367), 20 states have internal predecessors, (1367), 0 states have call successors, (0), 0 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 21:12:01,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:12:01,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:12:01,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:12:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:12:02,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:12:02,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:12:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1554758246, now seen corresponding path program 2 times [2023-08-30 21:12:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:12:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542206663] [2023-08-30 21:12:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:12:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:12:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:12:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:02,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:12:02,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542206663] [2023-08-30 21:12:02,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542206663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:12:02,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327792404] [2023-08-30 21:12:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:12:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:12:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:12:02,334 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 21:12:02,336 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 21:12:02,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:12:02,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:12:02,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 21:12:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:12:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:02,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:12:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:02,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327792404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:12:02,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:12:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-30 21:12:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364016476] [2023-08-30 21:12:02,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:12:02,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:12:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:12:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:12:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:12:02,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:12:02,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 1807 transitions, 46098 flow. Second operand has 17 states, 17 states have (on average 68.47058823529412) internal successors, (1164), 17 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 21:12:02,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:12:02,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:12:02,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:12:19,055 INFO L130 PetriNetUnfolder]: 23584/38329 cut-off events. [2023-08-30 21:12:19,055 INFO L131 PetriNetUnfolder]: For 1220708/1220708 co-relation queries the response was YES. [2023-08-30 21:12:19,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385904 conditions, 38329 events. 23584/38329 cut-off events. For 1220708/1220708 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 308207 event pairs, 540 based on Foata normal form. 332/38661 useless extension candidates. Maximal degree in co-relation 380395. Up to 9631 conditions per place. [2023-08-30 21:12:19,547 INFO L137 encePairwiseOnDemand]: 146/158 looper letters, 1346 selfloop transitions, 2259 changer transitions 3/3608 dead transitions. [2023-08-30 21:12:19,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 3608 transitions, 94149 flow [2023-08-30 21:12:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 21:12:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 21:12:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4024 transitions. [2023-08-30 21:12:19,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48053498925244803 [2023-08-30 21:12:19,551 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4024 transitions. [2023-08-30 21:12:19,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4024 transitions. [2023-08-30 21:12:19,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:12:19,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4024 transitions. [2023-08-30 21:12:19,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.9245283018868) internal successors, (4024), 53 states have internal predecessors, (4024), 0 states have call successors, (0), 0 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 21:12:19,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 158.0) internal successors, (8532), 54 states have internal predecessors, (8532), 0 states have call successors, (0), 0 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 21:12:19,563 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 158.0) internal successors, (8532), 54 states have internal predecessors, (8532), 0 states have call successors, (0), 0 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 21:12:19,563 INFO L175 Difference]: Start difference. First operand has 226 places, 1807 transitions, 46098 flow. Second operand 53 states and 4024 transitions. [2023-08-30 21:12:19,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 3608 transitions, 94149 flow [2023-08-30 21:12:41,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 3608 transitions, 86429 flow, removed 3803 selfloop flow, removed 3 redundant places. [2023-08-30 21:12:41,341 INFO L231 Difference]: Finished difference. Result has 311 places, 2983 transitions, 78086 flow [2023-08-30 21:12:41,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=41668, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=78086, PETRI_PLACES=311, PETRI_TRANSITIONS=2983} [2023-08-30 21:12:41,343 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2023-08-30 21:12:41,343 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 2983 transitions, 78086 flow [2023-08-30 21:12:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.47058823529412) internal successors, (1164), 17 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 21:12:41,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:12:41,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:12:41,353 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 21:12:41,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:12:41,547 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:12:41,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:12:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash 297562558, now seen corresponding path program 3 times [2023-08-30 21:12:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:12:41,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893327208] [2023-08-30 21:12:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:12:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:12:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:12:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:41,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:12:41,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893327208] [2023-08-30 21:12:41,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893327208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:12:41,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358026129] [2023-08-30 21:12:41,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:12:41,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:12:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:12:41,684 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 21:12:41,686 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 21:12:41,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:12:41,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:12:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 21:12:41,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:12:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:41,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:12:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:12:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358026129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:12:42,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:12:42,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 19 [2023-08-30 21:12:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766633196] [2023-08-30 21:12:42,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:12:42,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:12:42,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:12:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:12:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:12:42,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:12:42,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 2983 transitions, 78086 flow. Second operand has 20 states, 20 states have (on average 68.35) internal successors, (1367), 20 states have internal predecessors, (1367), 0 states have call successors, (0), 0 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 21:12:42,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:12:42,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:12:42,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:13:21,301 INFO L130 PetriNetUnfolder]: 35494/58607 cut-off events. [2023-08-30 21:13:21,301 INFO L131 PetriNetUnfolder]: For 2144264/2144264 co-relation queries the response was YES. [2023-08-30 21:13:22,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613322 conditions, 58607 events. 35494/58607 cut-off events. For 2144264/2144264 co-relation queries the response was YES. Maximal size of possible extension queue 2923. Compared 509806 event pairs, 644 based on Foata normal form. 1348/59955 useless extension candidates. Maximal degree in co-relation 607363. Up to 11305 conditions per place. [2023-08-30 21:13:22,915 INFO L137 encePairwiseOnDemand]: 146/158 looper letters, 1964 selfloop transitions, 3888 changer transitions 7/5859 dead transitions. [2023-08-30 21:13:22,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 5859 transitions, 161563 flow [2023-08-30 21:13:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 21:13:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 21:13:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5116 transitions. [2023-08-30 21:13:22,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832798035140752 [2023-08-30 21:13:22,920 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5116 transitions. [2023-08-30 21:13:22,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5116 transitions. [2023-08-30 21:13:22,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:13:22,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5116 transitions. [2023-08-30 21:13:22,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 76.35820895522389) internal successors, (5116), 67 states have internal predecessors, (5116), 0 states have call successors, (0), 0 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 21:13:22,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 158.0) internal successors, (10744), 68 states have internal predecessors, (10744), 0 states have call successors, (0), 0 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 21:13:22,933 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 158.0) internal successors, (10744), 68 states have internal predecessors, (10744), 0 states have call successors, (0), 0 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 21:13:22,933 INFO L175 Difference]: Start difference. First operand has 311 places, 2983 transitions, 78086 flow. Second operand 67 states and 5116 transitions. [2023-08-30 21:13:22,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 5859 transitions, 161563 flow [2023-08-30 21:14:41,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 5859 transitions, 155592 flow, removed 2494 selfloop flow, removed 3 redundant places. [2023-08-30 21:14:41,311 INFO L231 Difference]: Finished difference. Result has 423 places, 4865 transitions, 139568 flow [2023-08-30 21:14:41,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=73472, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=139568, PETRI_PLACES=423, PETRI_TRANSITIONS=4865} [2023-08-30 21:14:41,313 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 393 predicate places. [2023-08-30 21:14:41,313 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 4865 transitions, 139568 flow [2023-08-30 21:14:41,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.35) internal successors, (1367), 20 states have internal predecessors, (1367), 0 states have call successors, (0), 0 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 21:14:41,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:14:41,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:14:41,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 21:14:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:41,521 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:14:41,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:14:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash 202214234, now seen corresponding path program 4 times [2023-08-30 21:14:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:14:41,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980394136] [2023-08-30 21:14:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:14:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:14:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:14:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:14:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980394136] [2023-08-30 21:14:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980394136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:14:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010284433] [2023-08-30 21:14:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:14:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:14:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:14:41,646 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 21:14:41,648 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 21:14:41,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:14:41,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:14:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:14:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:14:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:41,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:14:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:14:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010284433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:14:42,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:14:42,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 9] total 18 [2023-08-30 21:14:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003338378] [2023-08-30 21:14:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:14:42,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:14:42,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:14:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:14:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:14:42,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:14:42,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 4865 transitions, 139568 flow. Second operand has 19 states, 19 states have (on average 68.3157894736842) internal successors, (1298), 19 states have internal predecessors, (1298), 0 states have call successors, (0), 0 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 21:14:42,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:14:42,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:14:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:16:34,014 INFO L130 PetriNetUnfolder]: 62786/104811 cut-off events. [2023-08-30 21:16:34,014 INFO L131 PetriNetUnfolder]: For 4598171/4598171 co-relation queries the response was YES. [2023-08-30 21:16:37,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206547 conditions, 104811 events. 62786/104811 cut-off events. For 4598171/4598171 co-relation queries the response was YES. Maximal size of possible extension queue 5683. Compared 1002634 event pairs, 1299 based on Foata normal form. 1576/106387 useless extension candidates. Maximal degree in co-relation 1202749. Up to 19077 conditions per place. [2023-08-30 21:16:38,525 INFO L137 encePairwiseOnDemand]: 146/158 looper letters, 2493 selfloop transitions, 8217 changer transitions 6/10716 dead transitions. [2023-08-30 21:16:38,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 10716 transitions, 322799 flow [2023-08-30 21:16:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-08-30 21:16:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-08-30 21:16:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 7888 transitions. [2023-08-30 21:16:38,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754671488848704 [2023-08-30 21:16:38,538 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 7888 transitions. [2023-08-30 21:16:38,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 7888 transitions. [2023-08-30 21:16:38,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:16:38,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 7888 transitions. [2023-08-30 21:16:38,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 75.12380952380953) internal successors, (7888), 105 states have internal predecessors, (7888), 0 states have call successors, (0), 0 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 21:16:38,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 158.0) internal successors, (16748), 106 states have internal predecessors, (16748), 0 states have call successors, (0), 0 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 21:16:38,566 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 158.0) internal successors, (16748), 106 states have internal predecessors, (16748), 0 states have call successors, (0), 0 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 21:16:38,566 INFO L175 Difference]: Start difference. First operand has 423 places, 4865 transitions, 139568 flow. Second operand 105 states and 7888 transitions. [2023-08-30 21:16:38,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 10716 transitions, 322799 flow [2023-08-30 21:23:34,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 10716 transitions, 313991 flow, removed 4389 selfloop flow, removed 3 redundant places. [2023-08-30 21:23:34,594 INFO L231 Difference]: Finished difference. Result has 587 places, 9326 transitions, 293603 flow [2023-08-30 21:23:34,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=135004, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=293603, PETRI_PLACES=587, PETRI_TRANSITIONS=9326} [2023-08-30 21:23:34,598 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 557 predicate places. [2023-08-30 21:23:34,598 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 9326 transitions, 293603 flow [2023-08-30 21:23:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 68.3157894736842) internal successors, (1298), 19 states have internal predecessors, (1298), 0 states have call successors, (0), 0 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 21:23:34,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:23:34,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:23:34,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 21:23:34,802 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,SelfDestructingSolverStorable20 [2023-08-30 21:23:34,802 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:23:34,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:23:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1978482770, now seen corresponding path program 5 times [2023-08-30 21:23:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:23:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483090714] [2023-08-30 21:23:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:23:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:23:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:23:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:23:34,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:23:34,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483090714] [2023-08-30 21:23:34,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483090714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:23:34,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850669189] [2023-08-30 21:23:34,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:23:34,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:23:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:23:34,895 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 21:23:34,897 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 21:23:34,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:23:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:23:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 21:23:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:23:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:23:34,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:23:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:23:35,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850669189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:23:35,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:23:35,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-30 21:23:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069367288] [2023-08-30 21:23:35,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:23:35,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:23:35,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:23:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:23:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:23:35,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-30 21:23:35,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 9326 transitions, 293603 flow. Second operand has 17 states, 17 states have (on average 68.47058823529412) internal successors, (1164), 17 states have internal predecessors, (1164), 0 states have call successors, (0), 0 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 21:23:35,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:23:35,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-30 21:23:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15