./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-subst.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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:15:35,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:15:35,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:15:35,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:15:35,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:15:35,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:15:35,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:15:35,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:15:35,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:15:35,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:15:35,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:15:35,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:15:35,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:15:35,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:15:35,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:15:35,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:15:35,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:15:35,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:15:35,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:15:35,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:15:35,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:15:35,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:15:35,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:15:35,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:15:35,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:15:35,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:15:35,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:15:35,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:15:35,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:15:35,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:15:35,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:15:35,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:15:35,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:15:35,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:15:35,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:15:35,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:15:35,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:15:35,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:15:35,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:15:35,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:15:35,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:15:35,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:15:35,814 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:15:35,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:15:35,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:15:35,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:15:35,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:15:35,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:15:35,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:15:35,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:15:35,818 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:15:35,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:15:35,819 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:15:35,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:15:35,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:15:35,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:15:35,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:15:35,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:15:35,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:15:35,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:15:35,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:15:35,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:15:35,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:15:35,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:15:35,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:15:35,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:15:35,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:15:35,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:15:35,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:15:35,823 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:15:35,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:15:35,823 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:15:35,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:15:36,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:15:36,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:15:36,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:15:36,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:15:36,145 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:15:36,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 12:15:37,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:15:37,593 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:15:37,593 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-subst.wvr.c [2023-09-01 12:15:37,598 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8807281c9/6f4363ac143744808849c97223f459b6/FLAGfe6761210 [2023-09-01 12:15:37,609 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8807281c9/6f4363ac143744808849c97223f459b6 [2023-09-01 12:15:37,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:15:37,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:15:37,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:15:37,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:15:37,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:15:37,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212e2c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37, skipping insertion in model container [2023-09-01 12:15:37,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:15:37,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:15:37,813 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/chl-word-subst.wvr.c[3345,3358] [2023-09-01 12:15:37,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:15:37,837 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:15:37,878 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/chl-word-subst.wvr.c[3345,3358] [2023-09-01 12:15:37,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:15:37,902 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:15:37,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37 WrapperNode [2023-09-01 12:15:37,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:15:37,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:15:37,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:15:37,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:15:37,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,968 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 185 [2023-09-01 12:15:37,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:15:37,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:15:37,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:15:37,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:15:37,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:37,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:38,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:38,016 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:38,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:38,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:15:38,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:15:38,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:15:38,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:15:38,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (1/1) ... [2023-09-01 12:15:38,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:15:38,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:38,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:15:38,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:15:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:15:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:15:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:15:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:15:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:15:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:15:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:15:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:15:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:15:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:15:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:15:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:15:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:15:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:15:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:15:38,109 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:15:38,209 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:15:38,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:15:38,586 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:15:38,596 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:15:38,596 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 12:15:38,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:38 BoogieIcfgContainer [2023-09-01 12:15:38,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:15:38,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:15:38,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:15:38,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:15:38,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:15:37" (1/3) ... [2023-09-01 12:15:38,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5a0e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:38, skipping insertion in model container [2023-09-01 12:15:38,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:15:37" (2/3) ... [2023-09-01 12:15:38,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5a0e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:15:38, skipping insertion in model container [2023-09-01 12:15:38,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:15:38" (3/3) ... [2023-09-01 12:15:38,613 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-09-01 12:15:38,619 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:15:38,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:15:38,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:15:38,627 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:15:38,798 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:15:38,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 297 transitions, 618 flow [2023-09-01 12:15:38,958 INFO L130 PetriNetUnfolder]: 29/294 cut-off events. [2023-09-01 12:15:38,958 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:15:38,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 294 events. 29/294 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-09-01 12:15:38,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 297 transitions, 618 flow [2023-09-01 12:15:38,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 284 transitions, 586 flow [2023-09-01 12:15:38,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:15:38,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 284 transitions, 586 flow [2023-09-01 12:15:38,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 284 transitions, 586 flow [2023-09-01 12:15:38,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 284 transitions, 586 flow [2023-09-01 12:15:39,068 INFO L130 PetriNetUnfolder]: 29/284 cut-off events. [2023-09-01 12:15:39,068 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:15:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 284 events. 29/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 232. Up to 3 conditions per place. [2023-09-01 12:15:39,073 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-09-01 12:15:46,902 INFO L134 LiptonReduction]: Checked pairs total: 9778 [2023-09-01 12:15:46,903 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-09-01 12:15:46,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:15:46,920 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;@12b842f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:15:46,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:15:46,928 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2023-09-01 12:15:46,928 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:15:46,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:46,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:46,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:46,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash -767736383, now seen corresponding path program 1 times [2023-09-01 12:15:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:46,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549312861] [2023-09-01 12:15:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549312861] [2023-09-01 12:15:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549312861] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:15:47,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178488090] [2023-09-01 12:15:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:15:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:15:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:15:47,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 594 [2023-09-01 12:15:47,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:47,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:47,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 594 [2023-09-01 12:15:47,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:47,803 INFO L130 PetriNetUnfolder]: 1126/1525 cut-off events. [2023-09-01 12:15:47,803 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 12:15:47,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1525 events. 1126/1525 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5006 event pairs, 489 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 2520. Up to 1127 conditions per place. [2023-09-01 12:15:47,818 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 35 selfloop transitions, 0 changer transitions 26/61 dead transitions. [2023-09-01 12:15:47,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 275 flow [2023-09-01 12:15:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:15:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:15:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-09-01 12:15:47,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214365881032546 [2023-09-01 12:15:47,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-09-01 12:15:47,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-09-01 12:15:47,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:47,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-09-01 12:15:47,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:47,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:47,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 594.0) internal successors, (2376), 4 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:47,857 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 877 transitions. [2023-09-01 12:15:47,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 275 flow [2023-09-01 12:15:47,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:15:47,864 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2023-09-01 12:15:47,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-09-01 12:15:47,869 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-09-01 12:15:47,869 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2023-09-01 12:15:47,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:47,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:47,870 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] [2023-09-01 12:15:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:15:47,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:47,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash 232711153, now seen corresponding path program 1 times [2023-09-01 12:15:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:47,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845434072] [2023-09-01 12:15:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845434072] [2023-09-01 12:15:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845434072] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:48,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:48,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:48,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140600184] [2023-09-01 12:15:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:48,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:48,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:48,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:48,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:48,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:48,988 INFO L130 PetriNetUnfolder]: 742/1039 cut-off events. [2023-09-01 12:15:48,988 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 12:15:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1039 events. 742/1039 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3759 event pairs, 47 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2112. Up to 750 conditions per place. [2023-09-01 12:15:48,992 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-09-01 12:15:48,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 327 flow [2023-09-01 12:15:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1383 transitions. [2023-09-01 12:15:48,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2023-09-01 12:15:48,997 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1383 transitions. [2023-09-01 12:15:48,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1383 transitions. [2023-09-01 12:15:48,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:48,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1383 transitions. [2023-09-01 12:15:49,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,008 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 5 states and 1383 transitions. [2023-09-01 12:15:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 327 flow [2023-09-01 12:15:49,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 323 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:49,010 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 91 flow [2023-09-01 12:15:49,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-09-01 12:15:49,011 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-09-01 12:15:49,012 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 91 flow [2023-09-01 12:15:49,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:49,013 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] [2023-09-01 12:15:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:15:49,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:49,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1633443233, now seen corresponding path program 2 times [2023-09-01 12:15:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:49,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334342152] [2023-09-01 12:15:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:49,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334342152] [2023-09-01 12:15:49,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334342152] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:49,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:49,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823921025] [2023-09-01 12:15:49,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:49,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:49,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:49,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:49,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:49,936 INFO L130 PetriNetUnfolder]: 804/1161 cut-off events. [2023-09-01 12:15:49,936 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-09-01 12:15:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1161 events. 804/1161 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4107 event pairs, 393 based on Foata normal form. 1/929 useless extension candidates. Maximal degree in co-relation 2564. Up to 895 conditions per place. [2023-09-01 12:15:49,941 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 60 selfloop transitions, 3 changer transitions 10/73 dead transitions. [2023-09-01 12:15:49,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 333 flow [2023-09-01 12:15:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1378 transitions. [2023-09-01 12:15:49,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463973063973064 [2023-09-01 12:15:49,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1378 transitions. [2023-09-01 12:15:49,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1378 transitions. [2023-09-01 12:15:49,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:49,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1378 transitions. [2023-09-01 12:15:49,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.6) internal successors, (1378), 5 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,955 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,955 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 91 flow. Second operand 5 states and 1378 transitions. [2023-09-01 12:15:49,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 333 flow [2023-09-01 12:15:49,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 324 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:49,959 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2023-09-01 12:15:49,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-09-01 12:15:49,960 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-09-01 12:15:49,963 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2023-09-01 12:15:49,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:49,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:49,964 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] [2023-09-01 12:15:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:15:49,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:49,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 335853887, now seen corresponding path program 3 times [2023-09-01 12:15:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:49,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744136920] [2023-09-01 12:15:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:50,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744136920] [2023-09-01 12:15:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744136920] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:50,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359625406] [2023-09-01 12:15:50,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:50,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:50,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:50,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:50,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:50,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:50,903 INFO L130 PetriNetUnfolder]: 884/1293 cut-off events. [2023-09-01 12:15:50,904 INFO L131 PetriNetUnfolder]: For 758/758 co-relation queries the response was YES. [2023-09-01 12:15:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1293 events. 884/1293 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5286 event pairs, 77 based on Foata normal form. 1/1033 useless extension candidates. Maximal degree in co-relation 3033. Up to 904 conditions per place. [2023-09-01 12:15:50,912 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 67 selfloop transitions, 3 changer transitions 11/81 dead transitions. [2023-09-01 12:15:50,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 385 flow [2023-09-01 12:15:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1385 transitions. [2023-09-01 12:15:50,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2023-09-01 12:15:50,919 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1385 transitions. [2023-09-01 12:15:50,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1385 transitions. [2023-09-01 12:15:50,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:50,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1385 transitions. [2023-09-01 12:15:50,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:50,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:50,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:50,930 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 5 states and 1385 transitions. [2023-09-01 12:15:50,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 385 flow [2023-09-01 12:15:50,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 374 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:50,935 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 123 flow [2023-09-01 12:15:50,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-09-01 12:15:50,937 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-09-01 12:15:50,937 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 123 flow [2023-09-01 12:15:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:50,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:50,938 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] [2023-09-01 12:15:50,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:15:50,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:50,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash -279052683, now seen corresponding path program 4 times [2023-09-01 12:15:50,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:50,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416755167] [2023-09-01 12:15:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:51,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416755167] [2023-09-01 12:15:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416755167] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:51,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:51,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:51,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183478012] [2023-09-01 12:15:51,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:51,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:51,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:51,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:51,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:51,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:51,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:52,105 INFO L130 PetriNetUnfolder]: 983/1468 cut-off events. [2023-09-01 12:15:52,106 INFO L131 PetriNetUnfolder]: For 1519/1519 co-relation queries the response was YES. [2023-09-01 12:15:52,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1468 events. 983/1468 cut-off events. For 1519/1519 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5805 event pairs, 494 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 3591. Up to 1056 conditions per place. [2023-09-01 12:15:52,112 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 63 selfloop transitions, 4 changer transitions 11/78 dead transitions. [2023-09-01 12:15:52,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 398 flow [2023-09-01 12:15:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1380 transitions. [2023-09-01 12:15:52,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-09-01 12:15:52,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1380 transitions. [2023-09-01 12:15:52,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1380 transitions. [2023-09-01 12:15:52,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:52,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1380 transitions. [2023-09-01 12:15:52,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,127 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 123 flow. Second operand 5 states and 1380 transitions. [2023-09-01 12:15:52,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 398 flow [2023-09-01 12:15:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 382 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 12:15:52,132 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 148 flow [2023-09-01 12:15:52,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-09-01 12:15:52,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-09-01 12:15:52,135 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 148 flow [2023-09-01 12:15:52,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:52,136 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] [2023-09-01 12:15:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:15:52,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:52,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -516534259, now seen corresponding path program 5 times [2023-09-01 12:15:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86663707] [2023-09-01 12:15:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:52,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86663707] [2023-09-01 12:15:52,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86663707] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:52,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:52,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:52,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847044044] [2023-09-01 12:15:52,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:52,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:52,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:52,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:52,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:52,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:53,138 INFO L130 PetriNetUnfolder]: 977/1448 cut-off events. [2023-09-01 12:15:53,138 INFO L131 PetriNetUnfolder]: For 2082/2082 co-relation queries the response was YES. [2023-09-01 12:15:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1448 events. 977/1448 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5716 event pairs, 563 based on Foata normal form. 1/1156 useless extension candidates. Maximal degree in co-relation 3666. Up to 1179 conditions per place. [2023-09-01 12:15:53,146 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 65 selfloop transitions, 4 changer transitions 10/79 dead transitions. [2023-09-01 12:15:53,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 407 flow [2023-09-01 12:15:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1382 transitions. [2023-09-01 12:15:53,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653198653198653 [2023-09-01 12:15:53,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1382 transitions. [2023-09-01 12:15:53,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1382 transitions. [2023-09-01 12:15:53,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:53,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1382 transitions. [2023-09-01 12:15:53,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.4) internal successors, (1382), 5 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,159 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 148 flow. Second operand 5 states and 1382 transitions. [2023-09-01 12:15:53,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 407 flow [2023-09-01 12:15:53,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 391 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 12:15:53,166 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 147 flow [2023-09-01 12:15:53,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-09-01 12:15:53,168 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-09-01 12:15:53,168 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 147 flow [2023-09-01 12:15:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:53,171 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] [2023-09-01 12:15:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:15:53,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:53,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1858424173, now seen corresponding path program 6 times [2023-09-01 12:15:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:53,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925099929] [2023-09-01 12:15:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:53,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925099929] [2023-09-01 12:15:53,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925099929] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:53,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:53,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:53,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394259307] [2023-09-01 12:15:53,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:53,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:15:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:15:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:53,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 594 [2023-09-01 12:15:53,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:53,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 594 [2023-09-01 12:15:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:54,064 INFO L130 PetriNetUnfolder]: 964/1423 cut-off events. [2023-09-01 12:15:54,064 INFO L131 PetriNetUnfolder]: For 1843/1843 co-relation queries the response was YES. [2023-09-01 12:15:54,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1423 events. 964/1423 cut-off events. For 1843/1843 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5442 event pairs, 494 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 3579. Up to 1056 conditions per place. [2023-09-01 12:15:54,070 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 3 changer transitions 10/83 dead transitions. [2023-09-01 12:15:54,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 420 flow [2023-09-01 12:15:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1386 transitions. [2023-09-01 12:15:54,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-09-01 12:15:54,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1386 transitions. [2023-09-01 12:15:54,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1386 transitions. [2023-09-01 12:15:54,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:54,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1386 transitions. [2023-09-01 12:15:54,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,083 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,083 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 147 flow. Second operand 5 states and 1386 transitions. [2023-09-01 12:15:54,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 420 flow [2023-09-01 12:15:54,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 409 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:15:54,089 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-09-01 12:15:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-09-01 12:15:54,090 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-09-01 12:15:54,090 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-09-01 12:15:54,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:54,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:15:54,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:54,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash 31607289, now seen corresponding path program 1 times [2023-09-01 12:15:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:54,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543139121] [2023-09-01 12:15:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:54,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:54,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543139121] [2023-09-01 12:15:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543139121] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:54,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:54,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:54,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440765574] [2023-09-01 12:15:54,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:54,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:54,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-09-01 12:15:54,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:54,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-09-01 12:15:54,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:54,442 INFO L130 PetriNetUnfolder]: 1250/1858 cut-off events. [2023-09-01 12:15:54,468 INFO L131 PetriNetUnfolder]: For 2993/2993 co-relation queries the response was YES. [2023-09-01 12:15:54,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1858 events. 1250/1858 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8228 event pairs, 82 based on Foata normal form. 42/1511 useless extension candidates. Maximal degree in co-relation 4546. Up to 1135 conditions per place. [2023-09-01 12:15:54,478 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-09-01 12:15:54,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 413 flow [2023-09-01 12:15:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-09-01 12:15:54,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47853535353535354 [2023-09-01 12:15:54,483 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-09-01 12:15:54,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-09-01 12:15:54,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:54,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-09-01 12:15:54,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,491 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 4 states and 1137 transitions. [2023-09-01 12:15:54,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 413 flow [2023-09-01 12:15:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 404 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:15:54,494 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 199 flow [2023-09-01 12:15:54,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-09-01 12:15:54,496 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-09-01 12:15:54,497 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 199 flow [2023-09-01 12:15:54,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:54,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:15:54,498 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:54,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:54,498 INFO L85 PathProgramCache]: Analyzing trace with hash 330536063, now seen corresponding path program 2 times [2023-09-01 12:15:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532230266] [2023-09-01 12:15:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532230266] [2023-09-01 12:15:54,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532230266] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:54,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:54,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411684076] [2023-09-01 12:15:54,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:54,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-09-01 12:15:54,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:54,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-09-01 12:15:54,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:54,848 INFO L130 PetriNetUnfolder]: 1145/1709 cut-off events. [2023-09-01 12:15:54,849 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-09-01 12:15:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1709 events. 1145/1709 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7373 event pairs, 61 based on Foata normal form. 42/1388 useless extension candidates. Maximal degree in co-relation 4435. Up to 1028 conditions per place. [2023-09-01 12:15:54,859 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 72 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-09-01 12:15:54,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 496 flow [2023-09-01 12:15:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-09-01 12:15:54,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47769360269360267 [2023-09-01 12:15:54,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-09-01 12:15:54,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-09-01 12:15:54,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:54,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-09-01 12:15:54,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,870 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 199 flow. Second operand 4 states and 1135 transitions. [2023-09-01 12:15:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 496 flow [2023-09-01 12:15:54,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 12:15:54,876 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 284 flow [2023-09-01 12:15:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-09-01 12:15:54,877 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-09-01 12:15:54,877 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 284 flow [2023-09-01 12:15:54,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:54,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:54,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:15:54,878 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:54,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1419436303, now seen corresponding path program 1 times [2023-09-01 12:15:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:54,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279613811] [2023-09-01 12:15:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:54,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:54,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279613811] [2023-09-01 12:15:54,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279613811] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:54,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:54,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462304429] [2023-09-01 12:15:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:54,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:55,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-09-01 12:15:55,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:55,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-09-01 12:15:55,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:55,262 INFO L130 PetriNetUnfolder]: 1135/1699 cut-off events. [2023-09-01 12:15:55,262 INFO L131 PetriNetUnfolder]: For 3195/3195 co-relation queries the response was YES. [2023-09-01 12:15:55,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1699 events. 1135/1699 cut-off events. For 3195/3195 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7225 event pairs, 319 based on Foata normal form. 10/1346 useless extension candidates. Maximal degree in co-relation 4753. Up to 1145 conditions per place. [2023-09-01 12:15:55,272 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 12 changer transitions 2/82 dead transitions. [2023-09-01 12:15:55,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 556 flow [2023-09-01 12:15:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-09-01 12:15:55,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-09-01 12:15:55,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-09-01 12:15:55,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-09-01 12:15:55,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:55,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-09-01 12:15:55,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,286 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 284 flow. Second operand 5 states and 1393 transitions. [2023-09-01 12:15:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 556 flow [2023-09-01 12:15:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 554 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 12:15:55,292 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 360 flow [2023-09-01 12:15:55,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-09-01 12:15:55,294 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-09-01 12:15:55,294 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 360 flow [2023-09-01 12:15:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:55,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:55,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:15:55,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:55,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 55249505, now seen corresponding path program 2 times [2023-09-01 12:15:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41486491] [2023-09-01 12:15:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41486491] [2023-09-01 12:15:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41486491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:55,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:55,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:55,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762073910] [2023-09-01 12:15:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:55,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:55,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:55,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-09-01 12:15:55,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 360 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:55,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-09-01 12:15:55,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:55,648 INFO L130 PetriNetUnfolder]: 1199/1801 cut-off events. [2023-09-01 12:15:55,648 INFO L131 PetriNetUnfolder]: For 4165/4165 co-relation queries the response was YES. [2023-09-01 12:15:55,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 1801 events. 1199/1801 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7972 event pairs, 220 based on Foata normal form. 16/1428 useless extension candidates. Maximal degree in co-relation 5147. Up to 1459 conditions per place. [2023-09-01 12:15:55,658 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 64 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-09-01 12:15:55,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 566 flow [2023-09-01 12:15:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1129 transitions. [2023-09-01 12:15:55,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751683501683502 [2023-09-01 12:15:55,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1129 transitions. [2023-09-01 12:15:55,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1129 transitions. [2023-09-01 12:15:55,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:55,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1129 transitions. [2023-09-01 12:15:55,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,669 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 360 flow. Second operand 4 states and 1129 transitions. [2023-09-01 12:15:55,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 566 flow [2023-09-01 12:15:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 541 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:55,676 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 383 flow [2023-09-01 12:15:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-09-01 12:15:55,676 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-09-01 12:15:55,677 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 383 flow [2023-09-01 12:15:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:55,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 12:15:55,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:55,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -482211297, now seen corresponding path program 3 times [2023-09-01 12:15:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36392482] [2023-09-01 12:15:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36392482] [2023-09-01 12:15:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36392482] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007990584] [2023-09-01 12:15:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:55,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-09-01 12:15:55,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:55,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:55,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-09-01 12:15:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:56,039 INFO L130 PetriNetUnfolder]: 1128/1686 cut-off events. [2023-09-01 12:15:56,040 INFO L131 PetriNetUnfolder]: For 4559/4559 co-relation queries the response was YES. [2023-09-01 12:15:56,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4950 conditions, 1686 events. 1128/1686 cut-off events. For 4559/4559 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7189 event pairs, 283 based on Foata normal form. 8/1331 useless extension candidates. Maximal degree in co-relation 4931. Up to 1318 conditions per place. [2023-09-01 12:15:56,048 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 73 selfloop transitions, 11 changer transitions 1/85 dead transitions. [2023-09-01 12:15:56,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 652 flow [2023-09-01 12:15:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-09-01 12:15:56,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469023569023569 [2023-09-01 12:15:56,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-09-01 12:15:56,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-09-01 12:15:56,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:56,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-09-01 12:15:56,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,060 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 383 flow. Second operand 5 states and 1393 transitions. [2023-09-01 12:15:56,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 652 flow [2023-09-01 12:15:56,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 642 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:56,071 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 403 flow [2023-09-01 12:15:56,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-09-01 12:15:56,072 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-09-01 12:15:56,072 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 403 flow [2023-09-01 12:15:56,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:56,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:56,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 12:15:56,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:56,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1330484071, now seen corresponding path program 4 times [2023-09-01 12:15:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:56,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948927874] [2023-09-01 12:15:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948927874] [2023-09-01 12:15:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948927874] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:56,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:56,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483740808] [2023-09-01 12:15:56,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:56,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 594 [2023-09-01 12:15:56,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:56,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 594 [2023-09-01 12:15:56,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:56,433 INFO L130 PetriNetUnfolder]: 1126/1690 cut-off events. [2023-09-01 12:15:56,433 INFO L131 PetriNetUnfolder]: For 5489/5489 co-relation queries the response was YES. [2023-09-01 12:15:56,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 1690 events. 1126/1690 cut-off events. For 5489/5489 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7250 event pairs, 240 based on Foata normal form. 14/1337 useless extension candidates. Maximal degree in co-relation 4975. Up to 1444 conditions per place. [2023-09-01 12:15:56,450 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 68 selfloop transitions, 7 changer transitions 9/84 dead transitions. [2023-09-01 12:15:56,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 650 flow [2023-09-01 12:15:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1125 transitions. [2023-09-01 12:15:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2023-09-01 12:15:56,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1125 transitions. [2023-09-01 12:15:56,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1125 transitions. [2023-09-01 12:15:56,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:56,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1125 transitions. [2023-09-01 12:15:56,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,460 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,460 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 403 flow. Second operand 4 states and 1125 transitions. [2023-09-01 12:15:56,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 650 flow [2023-09-01 12:15:56,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 616 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 12:15:56,477 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 364 flow [2023-09-01 12:15:56,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-09-01 12:15:56,478 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-09-01 12:15:56,479 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 364 flow [2023-09-01 12:15:56,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:56,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 12:15:56,480 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:56,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1564960603, now seen corresponding path program 3 times [2023-09-01 12:15:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:56,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469134208] [2023-09-01 12:15:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469134208] [2023-09-01 12:15:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469134208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:56,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591753141] [2023-09-01 12:15:56,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:56,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:56,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-09-01 12:15:56,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:56,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-09-01 12:15:56,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:56,865 INFO L130 PetriNetUnfolder]: 973/1441 cut-off events. [2023-09-01 12:15:56,865 INFO L131 PetriNetUnfolder]: For 3305/3305 co-relation queries the response was YES. [2023-09-01 12:15:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1441 events. 973/1441 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5650 event pairs, 444 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4198. Up to 1130 conditions per place. [2023-09-01 12:15:56,873 INFO L137 encePairwiseOnDemand]: 589/594 looper letters, 85 selfloop transitions, 5 changer transitions 4/94 dead transitions. [2023-09-01 12:15:56,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 642 flow [2023-09-01 12:15:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1407 transitions. [2023-09-01 12:15:56,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47373737373737373 [2023-09-01 12:15:56,878 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1407 transitions. [2023-09-01 12:15:56,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1407 transitions. [2023-09-01 12:15:56,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:56,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1407 transitions. [2023-09-01 12:15:56,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.4) internal successors, (1407), 5 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,885 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 594.0) internal successors, (3564), 6 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,886 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 364 flow. Second operand 5 states and 1407 transitions. [2023-09-01 12:15:56,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 642 flow [2023-09-01 12:15:56,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 612 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 12:15:56,892 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 316 flow [2023-09-01 12:15:56,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-09-01 12:15:56,893 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-09-01 12:15:56,893 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 316 flow [2023-09-01 12:15:56,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:56,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:56,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 12:15:56,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:56,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:56,896 INFO L85 PathProgramCache]: Analyzing trace with hash -831405779, now seen corresponding path program 4 times [2023-09-01 12:15:56,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:56,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333770507] [2023-09-01 12:15:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:56,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333770507] [2023-09-01 12:15:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333770507] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:56,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789073391] [2023-09-01 12:15:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:57,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 594 [2023-09-01 12:15:57,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:57,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 594 [2023-09-01 12:15:57,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:57,179 INFO L130 PetriNetUnfolder]: 913/1335 cut-off events. [2023-09-01 12:15:57,179 INFO L131 PetriNetUnfolder]: For 2218/2218 co-relation queries the response was YES. [2023-09-01 12:15:57,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 1335 events. 913/1335 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5122 event pairs, 191 based on Foata normal form. 16/1054 useless extension candidates. Maximal degree in co-relation 3817. Up to 1209 conditions per place. [2023-09-01 12:15:57,186 INFO L137 encePairwiseOnDemand]: 590/594 looper letters, 56 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2023-09-01 12:15:57,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 464 flow [2023-09-01 12:15:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1121 transitions. [2023-09-01 12:15:57,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718013468013468 [2023-09-01 12:15:57,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1121 transitions. [2023-09-01 12:15:57,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1121 transitions. [2023-09-01 12:15:57,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:57,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1121 transitions. [2023-09-01 12:15:57,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,196 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,196 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 316 flow. Second operand 4 states and 1121 transitions. [2023-09-01 12:15:57,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 464 flow [2023-09-01 12:15:57,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 439 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-09-01 12:15:57,199 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 292 flow [2023-09-01 12:15:57,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-09-01 12:15:57,200 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-09-01 12:15:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 292 flow [2023-09-01 12:15:57,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:57,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:57,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 12:15:57,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:57,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash -262667675, now seen corresponding path program 5 times [2023-09-01 12:15:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104417093] [2023-09-01 12:15:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:57,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104417093] [2023-09-01 12:15:57,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104417093] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:57,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:57,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283854384] [2023-09-01 12:15:57,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-09-01 12:15:57,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:57,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-09-01 12:15:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:57,481 INFO L130 PetriNetUnfolder]: 883/1283 cut-off events. [2023-09-01 12:15:57,481 INFO L131 PetriNetUnfolder]: For 1307/1307 co-relation queries the response was YES. [2023-09-01 12:15:57,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1283 events. 883/1283 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4715 event pairs, 497 based on Foata normal form. 4/1004 useless extension candidates. Maximal degree in co-relation 3679. Up to 1269 conditions per place. [2023-09-01 12:15:57,487 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 47 selfloop transitions, 0 changer transitions 8/55 dead transitions. [2023-09-01 12:15:57,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 398 flow [2023-09-01 12:15:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1103 transitions. [2023-09-01 12:15:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642255892255892 [2023-09-01 12:15:57,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1103 transitions. [2023-09-01 12:15:57,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1103 transitions. [2023-09-01 12:15:57,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:57,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1103 transitions. [2023-09-01 12:15:57,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.75) internal successors, (1103), 4 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,498 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,498 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 292 flow. Second operand 4 states and 1103 transitions. [2023-09-01 12:15:57,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 398 flow [2023-09-01 12:15:57,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 377 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:57,502 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 235 flow [2023-09-01 12:15:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-09-01 12:15:57,503 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-09-01 12:15:57,503 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 235 flow [2023-09-01 12:15:57,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:57,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:57,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 12:15:57,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:57,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1310580011, now seen corresponding path program 5 times [2023-09-01 12:15:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844857329] [2023-09-01 12:15:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:57,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:57,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844857329] [2023-09-01 12:15:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844857329] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:57,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:57,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:15:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647419977] [2023-09-01 12:15:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:15:57,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 594 [2023-09-01 12:15:57,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:57,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 594 [2023-09-01 12:15:57,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:57,757 INFO L130 PetriNetUnfolder]: 803/1151 cut-off events. [2023-09-01 12:15:57,757 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2023-09-01 12:15:57,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1151 events. 803/1151 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3967 event pairs, 444 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 3204. Up to 1130 conditions per place. [2023-09-01 12:15:57,763 INFO L137 encePairwiseOnDemand]: 591/594 looper letters, 44 selfloop transitions, 0 changer transitions 10/54 dead transitions. [2023-09-01 12:15:57,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 344 flow [2023-09-01 12:15:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:15:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:15:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1104 transitions. [2023-09-01 12:15:57,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-09-01 12:15:57,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1104 transitions. [2023-09-01 12:15:57,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1104 transitions. [2023-09-01 12:15:57,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:57,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1104 transitions. [2023-09-01 12:15:57,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 594.0) internal successors, (2970), 5 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,773 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 235 flow. Second operand 4 states and 1104 transitions. [2023-09-01 12:15:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 344 flow [2023-09-01 12:15:57,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 341 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:15:57,775 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-09-01 12:15:57,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-09-01 12:15:57,776 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-09-01 12:15:57,776 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-09-01 12:15:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 270.25) internal successors, (1081), 4 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:57,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:57,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:57,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 12:15:57,777 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:57,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1757760381, now seen corresponding path program 1 times [2023-09-01 12:15:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:57,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312189624] [2023-09-01 12:15:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:58,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:58,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312189624] [2023-09-01 12:15:58,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312189624] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:58,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:58,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 12:15:58,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156304487] [2023-09-01 12:15:58,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:15:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:15:58,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:58,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 594 [2023-09-01 12:15:58,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:58,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:58,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 594 [2023-09-01 12:15:58,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:59,686 INFO L130 PetriNetUnfolder]: 3096/4436 cut-off events. [2023-09-01 12:15:59,686 INFO L131 PetriNetUnfolder]: For 3284/3284 co-relation queries the response was YES. [2023-09-01 12:15:59,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 4436 events. 3096/4436 cut-off events. For 3284/3284 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20444 event pairs, 1032 based on Foata normal form. 1/3506 useless extension candidates. Maximal degree in co-relation 12384. Up to 693 conditions per place. [2023-09-01 12:15:59,704 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 219 selfloop transitions, 28 changer transitions 7/254 dead transitions. [2023-09-01 12:15:59,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 254 transitions, 1636 flow [2023-09-01 12:15:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:15:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:15:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2666 transitions. [2023-09-01 12:15:59,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44882154882154884 [2023-09-01 12:15:59,711 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2666 transitions. [2023-09-01 12:15:59,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2666 transitions. [2023-09-01 12:15:59,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:59,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2666 transitions. [2023-09-01 12:15:59,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 266.6) internal successors, (2666), 10 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,726 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 594.0) internal successors, (6534), 11 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,726 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 10 states and 2666 transitions. [2023-09-01 12:15:59,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 254 transitions, 1636 flow [2023-09-01 12:15:59,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 254 transitions, 1622 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:59,732 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 421 flow [2023-09-01 12:15:59,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=421, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-09-01 12:15:59,733 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-09-01 12:15:59,733 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 421 flow [2023-09-01 12:15:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 249.44444444444446) internal successors, (2245), 9 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:59,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:59,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:59,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 12:15:59,734 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:15:59,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -493399717, now seen corresponding path program 1 times [2023-09-01 12:15:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407905190] [2023-09-01 12:15:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407905190] [2023-09-01 12:15:59,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407905190] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834817349] [2023-09-01 12:15:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:59,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:59,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:59,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:15:59,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:16:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:16:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:00,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:01,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:16:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834817349] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:03,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-09-01 12:16:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001587763] [2023-09-01 12:16:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:03,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:16:04,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:16:04,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:04,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:04,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:16:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:08,206 INFO L130 PetriNetUnfolder]: 6090/8974 cut-off events. [2023-09-01 12:16:08,207 INFO L131 PetriNetUnfolder]: For 10029/10029 co-relation queries the response was YES. [2023-09-01 12:16:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28590 conditions, 8974 events. 6090/8974 cut-off events. For 10029/10029 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 50237 event pairs, 600 based on Foata normal form. 4/8079 useless extension candidates. Maximal degree in co-relation 28574. Up to 1372 conditions per place. [2023-09-01 12:16:08,255 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 380 selfloop transitions, 101 changer transitions 27/508 dead transitions. [2023-09-01 12:16:08,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 508 transitions, 3487 flow [2023-09-01 12:16:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:16:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:16:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5322 transitions. [2023-09-01 12:16:08,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725436179981633 [2023-09-01 12:16:08,268 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5322 transitions. [2023-09-01 12:16:08,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5322 transitions. [2023-09-01 12:16:08,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:08,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5322 transitions. [2023-09-01 12:16:08,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 241.9090909090909) internal successors, (5322), 22 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,293 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 594.0) internal successors, (13662), 23 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,294 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 421 flow. Second operand 22 states and 5322 transitions. [2023-09-01 12:16:08,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 508 transitions, 3487 flow [2023-09-01 12:16:08,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 508 transitions, 3485 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 12:16:08,316 INFO L231 Difference]: Finished difference. Result has 105 places, 173 transitions, 1537 flow [2023-09-01 12:16:08,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1537, PETRI_PLACES=105, PETRI_TRANSITIONS=173} [2023-09-01 12:16:08,316 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2023-09-01 12:16:08,317 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 173 transitions, 1537 flow [2023-09-01 12:16:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:08,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:08,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:08,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:16:08,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:08,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:08,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash 773516305, now seen corresponding path program 2 times [2023-09-01 12:16:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418338734] [2023-09-01 12:16:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418338734] [2023-09-01 12:16:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418338734] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559515210] [2023-09-01 12:16:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:08,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:08,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:08,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:08,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:16:08,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:16:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 12:16:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:09,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559515210] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:16:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316725044] [2023-09-01 12:16:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:09,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:16:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:16:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:16:10,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:16:10,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 173 transitions, 1537 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:10,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:10,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:16:10,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:11,645 INFO L130 PetriNetUnfolder]: 6398/9419 cut-off events. [2023-09-01 12:16:11,646 INFO L131 PetriNetUnfolder]: For 39822/39822 co-relation queries the response was YES. [2023-09-01 12:16:11,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 9419 events. 6398/9419 cut-off events. For 39822/39822 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52722 event pairs, 912 based on Foata normal form. 49/8974 useless extension candidates. Maximal degree in co-relation 39955. Up to 3793 conditions per place. [2023-09-01 12:16:11,704 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 238 selfloop transitions, 124 changer transitions 10/372 dead transitions. [2023-09-01 12:16:11,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 372 transitions, 3591 flow [2023-09-01 12:16:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:16:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:16:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4004 transitions. [2023-09-01 12:16:11,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2023-09-01 12:16:11,709 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4004 transitions. [2023-09-01 12:16:11,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4004 transitions. [2023-09-01 12:16:11,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4004 transitions. [2023-09-01 12:16:11,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 250.25) internal successors, (4004), 16 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:11,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:11,826 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:11,840 INFO L175 Difference]: Start difference. First operand has 105 places, 173 transitions, 1537 flow. Second operand 16 states and 4004 transitions. [2023-09-01 12:16:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 372 transitions, 3591 flow [2023-09-01 12:16:12,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 372 transitions, 3511 flow, removed 40 selfloop flow, removed 0 redundant places. [2023-09-01 12:16:12,016 INFO L231 Difference]: Finished difference. Result has 129 places, 220 transitions, 2423 flow [2023-09-01 12:16:12,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2423, PETRI_PLACES=129, PETRI_TRANSITIONS=220} [2023-09-01 12:16:12,016 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-09-01 12:16:12,017 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 220 transitions, 2423 flow [2023-09-01 12:16:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:12,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:12,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:12,223 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,SelfDestructingSolverStorable19 [2023-09-01 12:16:12,223 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:12,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1430753600, now seen corresponding path program 1 times [2023-09-01 12:16:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:12,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297501342] [2023-09-01 12:16:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:12,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:12,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297501342] [2023-09-01 12:16:12,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297501342] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056088559] [2023-09-01 12:16:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:12,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:12,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:12,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:16:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:16:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:13,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:13,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:16:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:13,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:13,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:16:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056088559] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-09-01 12:16:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219280069] [2023-09-01 12:16:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:16:16,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:16:16,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 220 transitions, 2423 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:16,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:16,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:16:16,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:20,369 INFO L130 PetriNetUnfolder]: 9862/14530 cut-off events. [2023-09-01 12:16:20,369 INFO L131 PetriNetUnfolder]: For 86655/86655 co-relation queries the response was YES. [2023-09-01 12:16:20,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67775 conditions, 14530 events. 9862/14530 cut-off events. For 86655/86655 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 87462 event pairs, 613 based on Foata normal form. 5/13765 useless extension candidates. Maximal degree in co-relation 67732. Up to 3294 conditions per place. [2023-09-01 12:16:20,477 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 297 selfloop transitions, 214 changer transitions 16/527 dead transitions. [2023-09-01 12:16:20,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 527 transitions, 5996 flow [2023-09-01 12:16:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:16:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:16:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3630 transitions. [2023-09-01 12:16:20,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-09-01 12:16:20,483 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3630 transitions. [2023-09-01 12:16:20,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3630 transitions. [2023-09-01 12:16:20,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:20,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3630 transitions. [2023-09-01 12:16:20,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 242.0) internal successors, (3630), 15 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:20,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:20,501 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:20,501 INFO L175 Difference]: Start difference. First operand has 129 places, 220 transitions, 2423 flow. Second operand 15 states and 3630 transitions. [2023-09-01 12:16:20,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 527 transitions, 5996 flow [2023-09-01 12:16:21,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 527 transitions, 5296 flow, removed 274 selfloop flow, removed 8 redundant places. [2023-09-01 12:16:21,208 INFO L231 Difference]: Finished difference. Result has 146 places, 316 transitions, 3915 flow [2023-09-01 12:16:21,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3915, PETRI_PLACES=146, PETRI_TRANSITIONS=316} [2023-09-01 12:16:21,209 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-09-01 12:16:21,209 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 316 transitions, 3915 flow [2023-09-01 12:16:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:21,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:21,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:21,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:21,416 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:21,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1629821531, now seen corresponding path program 3 times [2023-09-01 12:16:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:21,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349238711] [2023-09-01 12:16:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:21,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349238711] [2023-09-01 12:16:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349238711] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931803453] [2023-09-01 12:16:21,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:16:21,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:21,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:21,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:16:21,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:16:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:16:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:22,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931803453] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:22,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:16:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78922651] [2023-09-01 12:16:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:22,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:16:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:16:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:16:23,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-09-01 12:16:23,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 316 transitions, 3915 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:23,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:23,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-09-01 12:16:23,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:25,434 INFO L130 PetriNetUnfolder]: 9888/14677 cut-off events. [2023-09-01 12:16:25,435 INFO L131 PetriNetUnfolder]: For 112504/112504 co-relation queries the response was YES. [2023-09-01 12:16:25,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71383 conditions, 14677 events. 9888/14677 cut-off events. For 112504/112504 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 89023 event pairs, 1511 based on Foata normal form. 52/13927 useless extension candidates. Maximal degree in co-relation 71333. Up to 6687 conditions per place. [2023-09-01 12:16:25,529 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 254 selfloop transitions, 203 changer transitions 15/472 dead transitions. [2023-09-01 12:16:25,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 472 transitions, 6115 flow [2023-09-01 12:16:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:16:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:16:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3509 transitions. [2023-09-01 12:16:25,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421957671957672 [2023-09-01 12:16:25,534 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3509 transitions. [2023-09-01 12:16:25,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3509 transitions. [2023-09-01 12:16:25,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:25,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3509 transitions. [2023-09-01 12:16:25,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 250.64285714285714) internal successors, (3509), 14 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,546 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:25,547 INFO L175 Difference]: Start difference. First operand has 146 places, 316 transitions, 3915 flow. Second operand 14 states and 3509 transitions. [2023-09-01 12:16:25,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 472 transitions, 6115 flow [2023-09-01 12:16:26,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 472 transitions, 5957 flow, removed 79 selfloop flow, removed 0 redundant places. [2023-09-01 12:16:26,533 INFO L231 Difference]: Finished difference. Result has 167 places, 350 transitions, 4907 flow [2023-09-01 12:16:26,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4907, PETRI_PLACES=167, PETRI_TRANSITIONS=350} [2023-09-01 12:16:26,533 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 129 predicate places. [2023-09-01 12:16:26,533 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 350 transitions, 4907 flow [2023-09-01 12:16:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:26,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:26,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:26,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:26,741 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:26,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1609186473, now seen corresponding path program 1 times [2023-09-01 12:16:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435862335] [2023-09-01 12:16:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:27,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:27,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435862335] [2023-09-01 12:16:27,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435862335] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:27,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125188979] [2023-09-01 12:16:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:27,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:27,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:27,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:27,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:16:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:16:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:16:28,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:16:28,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:16:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125188979] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:29,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:16:29,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-09-01 12:16:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086625808] [2023-09-01 12:16:29,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:16:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:16:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:16:29,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-09-01 12:16:29,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 350 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:29,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:29,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-09-01 12:16:29,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:33,519 INFO L130 PetriNetUnfolder]: 13447/20065 cut-off events. [2023-09-01 12:16:33,519 INFO L131 PetriNetUnfolder]: For 177684/177684 co-relation queries the response was YES. [2023-09-01 12:16:33,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103138 conditions, 20065 events. 13447/20065 cut-off events. For 177684/177684 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 128669 event pairs, 3272 based on Foata normal form. 114/19117 useless extension candidates. Maximal degree in co-relation 103079. Up to 5325 conditions per place. [2023-09-01 12:16:33,668 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 366 selfloop transitions, 250 changer transitions 39/655 dead transitions. [2023-09-01 12:16:33,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 655 transitions, 9387 flow [2023-09-01 12:16:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:16:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:16:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3949 transitions. [2023-09-01 12:16:33,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41550925925925924 [2023-09-01 12:16:33,673 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3949 transitions. [2023-09-01 12:16:33,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3949 transitions. [2023-09-01 12:16:33,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:33,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3949 transitions. [2023-09-01 12:16:33,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 246.8125) internal successors, (3949), 16 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,688 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:33,688 INFO L175 Difference]: Start difference. First operand has 167 places, 350 transitions, 4907 flow. Second operand 16 states and 3949 transitions. [2023-09-01 12:16:33,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 655 transitions, 9387 flow [2023-09-01 12:16:35,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 655 transitions, 8962 flow, removed 120 selfloop flow, removed 7 redundant places. [2023-09-01 12:16:35,851 INFO L231 Difference]: Finished difference. Result has 182 places, 439 transitions, 6604 flow [2023-09-01 12:16:35,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6604, PETRI_PLACES=182, PETRI_TRANSITIONS=439} [2023-09-01 12:16:35,851 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2023-09-01 12:16:35,852 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 439 transitions, 6604 flow [2023-09-01 12:16:35,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:35,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:35,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:35,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:36,052 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,SelfDestructingSolverStorable22 [2023-09-01 12:16:36,053 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:36,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1006698783, now seen corresponding path program 2 times [2023-09-01 12:16:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012353601] [2023-09-01 12:16:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012353601] [2023-09-01 12:16:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012353601] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511404304] [2023-09-01 12:16:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:36,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:16:36,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:16:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:16:36,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:37,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511404304] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:37,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:37,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-09-01 12:16:37,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675521434] [2023-09-01 12:16:37,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:37,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:16:37,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:16:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:16:37,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-09-01 12:16:37,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 439 transitions, 6604 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:37,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:37,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-09-01 12:16:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:40,666 INFO L130 PetriNetUnfolder]: 13377/19984 cut-off events. [2023-09-01 12:16:40,666 INFO L131 PetriNetUnfolder]: For 185888/185888 co-relation queries the response was YES. [2023-09-01 12:16:40,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105190 conditions, 19984 events. 13377/19984 cut-off events. For 185888/185888 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 128356 event pairs, 2638 based on Foata normal form. 327/19213 useless extension candidates. Maximal degree in co-relation 105125. Up to 8884 conditions per place. [2023-09-01 12:16:40,812 INFO L137 encePairwiseOnDemand]: 582/594 looper letters, 298 selfloop transitions, 284 changer transitions 20/602 dead transitions. [2023-09-01 12:16:40,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 602 transitions, 9626 flow [2023-09-01 12:16:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:16:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:16:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2311 transitions. [2023-09-01 12:16:40,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43228582117471004 [2023-09-01 12:16:40,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2311 transitions. [2023-09-01 12:16:40,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2311 transitions. [2023-09-01 12:16:40,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:40,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2311 transitions. [2023-09-01 12:16:40,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.77777777777777) internal successors, (2311), 9 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:40,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:40,826 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:40,826 INFO L175 Difference]: Start difference. First operand has 182 places, 439 transitions, 6604 flow. Second operand 9 states and 2311 transitions. [2023-09-01 12:16:40,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 602 transitions, 9626 flow [2023-09-01 12:16:43,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 602 transitions, 9395 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-09-01 12:16:43,748 INFO L231 Difference]: Finished difference. Result has 188 places, 484 transitions, 8077 flow [2023-09-01 12:16:43,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=188, PETRI_TRANSITIONS=484} [2023-09-01 12:16:43,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-09-01 12:16:43,749 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 484 transitions, 8077 flow [2023-09-01 12:16:43,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:43,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:43,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:43,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 12:16:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:43,955 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:43,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1314180504, now seen corresponding path program 2 times [2023-09-01 12:16:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:43,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014192878] [2023-09-01 12:16:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014192878] [2023-09-01 12:16:44,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014192878] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454638730] [2023-09-01 12:16:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:16:44,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:44,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:44,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:16:44,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:16:44,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 12:16:44,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:44,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:44,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454638730] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:44,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:44,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:16:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554242685] [2023-09-01 12:16:44,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:44,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:16:44,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:16:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:16:45,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 594 [2023-09-01 12:16:45,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 484 transitions, 8077 flow. Second operand has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:45,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:45,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 594 [2023-09-01 12:16:45,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:49,092 INFO L130 PetriNetUnfolder]: 15608/22845 cut-off events. [2023-09-01 12:16:49,093 INFO L131 PetriNetUnfolder]: For 218392/218392 co-relation queries the response was YES. [2023-09-01 12:16:49,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128918 conditions, 22845 events. 15608/22845 cut-off events. For 218392/218392 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 143637 event pairs, 2781 based on Foata normal form. 14/21593 useless extension candidates. Maximal degree in co-relation 128851. Up to 12753 conditions per place. [2023-09-01 12:16:49,258 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 403 selfloop transitions, 294 changer transitions 14/711 dead transitions. [2023-09-01 12:16:49,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 711 transitions, 11946 flow [2023-09-01 12:16:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:16:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:16:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3492 transitions. [2023-09-01 12:16:49,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-09-01 12:16:49,262 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3492 transitions. [2023-09-01 12:16:49,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3492 transitions. [2023-09-01 12:16:49,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:49,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3492 transitions. [2023-09-01 12:16:49,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 249.42857142857142) internal successors, (3492), 14 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:49,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:49,273 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:49,273 INFO L175 Difference]: Start difference. First operand has 188 places, 484 transitions, 8077 flow. Second operand 14 states and 3492 transitions. [2023-09-01 12:16:49,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 711 transitions, 11946 flow [2023-09-01 12:16:51,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 711 transitions, 11287 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-09-01 12:16:51,564 INFO L231 Difference]: Finished difference. Result has 201 places, 558 transitions, 9468 flow [2023-09-01 12:16:51,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9468, PETRI_PLACES=201, PETRI_TRANSITIONS=558} [2023-09-01 12:16:51,565 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 163 predicate places. [2023-09-01 12:16:51,565 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 558 transitions, 9468 flow [2023-09-01 12:16:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 237.91666666666666) internal successors, (2855), 12 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:51,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:16:51,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:16:51,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:16:51,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:51,767 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:16:51,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:16:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash 141783206, now seen corresponding path program 3 times [2023-09-01 12:16:51,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:16:51,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125149220] [2023-09-01 12:16:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:16:51,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:16:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:16:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:16:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:16:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125149220] [2023-09-01 12:16:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125149220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:16:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398145008] [2023-09-01 12:16:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:16:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:16:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:16:51,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:16:51,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:16:52,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:16:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:16:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:16:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:16:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:16:52,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:16:52,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398145008] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:16:52,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:16:52,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:16:52,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881880856] [2023-09-01 12:16:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:16:52,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:16:52,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:16:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:16:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:16:53,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:16:53,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 558 transitions, 9468 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:53,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:16:53,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:16:53,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:16:57,392 INFO L130 PetriNetUnfolder]: 15712/23102 cut-off events. [2023-09-01 12:16:57,393 INFO L131 PetriNetUnfolder]: For 239582/239582 co-relation queries the response was YES. [2023-09-01 12:16:57,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130517 conditions, 23102 events. 15712/23102 cut-off events. For 239582/239582 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 146872 event pairs, 2491 based on Foata normal form. 126/21942 useless extension candidates. Maximal degree in co-relation 130446. Up to 12194 conditions per place. [2023-09-01 12:16:57,546 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 412 selfloop transitions, 329 changer transitions 10/751 dead transitions. [2023-09-01 12:16:57,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 751 transitions, 12718 flow [2023-09-01 12:16:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:16:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:16:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3756 transitions. [2023-09-01 12:16:57,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42154882154882156 [2023-09-01 12:16:57,551 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3756 transitions. [2023-09-01 12:16:57,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3756 transitions. [2023-09-01 12:16:57,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:16:57,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3756 transitions. [2023-09-01 12:16:57,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.4) internal successors, (3756), 15 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:57,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:57,561 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:16:57,562 INFO L175 Difference]: Start difference. First operand has 201 places, 558 transitions, 9468 flow. Second operand 15 states and 3756 transitions. [2023-09-01 12:16:57,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 751 transitions, 12718 flow [2023-09-01 12:17:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 751 transitions, 12595 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:00,080 INFO L231 Difference]: Finished difference. Result has 216 places, 594 transitions, 10798 flow [2023-09-01 12:17:00,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=9301, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10798, PETRI_PLACES=216, PETRI_TRANSITIONS=594} [2023-09-01 12:17:00,081 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 178 predicate places. [2023-09-01 12:17:00,081 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 594 transitions, 10798 flow [2023-09-01 12:17:00,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:00,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:00,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:17:00,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:00,282 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,SelfDestructingSolverStorable25 [2023-09-01 12:17:00,282 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:17:00,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1833563647, now seen corresponding path program 3 times [2023-09-01 12:17:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:00,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946447577] [2023-09-01 12:17:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:01,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946447577] [2023-09-01 12:17:01,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946447577] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:01,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621550036] [2023-09-01 12:17:01,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:17:01,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:01,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:01,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:01,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:17:01,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:17:01,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 12:17:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:01,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:01,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:17:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:01,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:01,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621550036] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:01,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:01,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2023-09-01 12:17:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541108020] [2023-09-01 12:17:01,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:01,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:17:01,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:17:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:17:02,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 594 [2023-09-01 12:17:02,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 594 transitions, 10798 flow. Second operand has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:02,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:02,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 594 [2023-09-01 12:17:02,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:07,236 INFO L130 PetriNetUnfolder]: 16812/24689 cut-off events. [2023-09-01 12:17:07,236 INFO L131 PetriNetUnfolder]: For 315246/315246 co-relation queries the response was YES. [2023-09-01 12:17:07,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147547 conditions, 24689 events. 16812/24689 cut-off events. For 315246/315246 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 158717 event pairs, 2801 based on Foata normal form. 249/23544 useless extension candidates. Maximal degree in co-relation 147471. Up to 15629 conditions per place. [2023-09-01 12:17:07,423 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 474 selfloop transitions, 366 changer transitions 14/854 dead transitions. [2023-09-01 12:17:07,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 854 transitions, 15237 flow [2023-09-01 12:17:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:17:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:17:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5039 transitions. [2023-09-01 12:17:07,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241582491582492 [2023-09-01 12:17:07,427 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5039 transitions. [2023-09-01 12:17:07,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5039 transitions. [2023-09-01 12:17:07,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:07,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5039 transitions. [2023-09-01 12:17:07,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 251.95) internal successors, (5039), 20 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:07,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:07,441 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 594.0) internal successors, (12474), 21 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:07,441 INFO L175 Difference]: Start difference. First operand has 216 places, 594 transitions, 10798 flow. Second operand 20 states and 5039 transitions. [2023-09-01 12:17:07,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 854 transitions, 15237 flow [2023-09-01 12:17:10,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 854 transitions, 14881 flow, removed 38 selfloop flow, removed 5 redundant places. [2023-09-01 12:17:10,734 INFO L231 Difference]: Finished difference. Result has 240 places, 695 transitions, 13614 flow [2023-09-01 12:17:10,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13614, PETRI_PLACES=240, PETRI_TRANSITIONS=695} [2023-09-01 12:17:10,735 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 202 predicate places. [2023-09-01 12:17:10,735 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 695 transitions, 13614 flow [2023-09-01 12:17:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 241.0909090909091) internal successors, (2652), 11 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:17:10,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:10,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 12:17:10,937 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:17:10,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:10,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1459391252, now seen corresponding path program 4 times [2023-09-01 12:17:10,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:10,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661217965] [2023-09-01 12:17:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:10,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:11,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:11,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661217965] [2023-09-01 12:17:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661217965] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:11,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853848445] [2023-09-01 12:17:11,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:17:11,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:11,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:11,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:17:11,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:17:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:17:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:11,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:17:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:12,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:12,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:17:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853848445] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-09-01 12:17:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069074813] [2023-09-01 12:17:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:17:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:17:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:17:14,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:17:14,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 695 transitions, 13614 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:14,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:14,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:17:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:21,824 INFO L130 PetriNetUnfolder]: 22729/33687 cut-off events. [2023-09-01 12:17:21,825 INFO L131 PetriNetUnfolder]: For 578241/578241 co-relation queries the response was YES. [2023-09-01 12:17:22,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225149 conditions, 33687 events. 22729/33687 cut-off events. For 578241/578241 co-relation queries the response was YES. Maximal size of possible extension queue 1708. Compared 231917 event pairs, 1601 based on Foata normal form. 19/31800 useless extension candidates. Maximal degree in co-relation 225062. Up to 9833 conditions per place. [2023-09-01 12:17:22,193 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 647 selfloop transitions, 421 changer transitions 29/1097 dead transitions. [2023-09-01 12:17:22,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1097 transitions, 21307 flow [2023-09-01 12:17:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:17:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:17:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3383 transitions. [2023-09-01 12:17:22,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068061568061568 [2023-09-01 12:17:22,197 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3383 transitions. [2023-09-01 12:17:22,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3383 transitions. [2023-09-01 12:17:22,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:22,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3383 transitions. [2023-09-01 12:17:22,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 241.64285714285714) internal successors, (3383), 14 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:22,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:22,207 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 594.0) internal successors, (8910), 15 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:22,208 INFO L175 Difference]: Start difference. First operand has 240 places, 695 transitions, 13614 flow. Second operand 14 states and 3383 transitions. [2023-09-01 12:17:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1097 transitions, 21307 flow [2023-09-01 12:17:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1097 transitions, 20587 flow, removed 67 selfloop flow, removed 6 redundant places. [2023-09-01 12:17:30,399 INFO L231 Difference]: Finished difference. Result has 253 places, 804 transitions, 16593 flow [2023-09-01 12:17:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16593, PETRI_PLACES=253, PETRI_TRANSITIONS=804} [2023-09-01 12:17:30,400 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 215 predicate places. [2023-09-01 12:17:30,400 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 804 transitions, 16593 flow [2023-09-01 12:17:30,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:30,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:30,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:17:30,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:30,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:17:30,607 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:17:30,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1550042883, now seen corresponding path program 4 times [2023-09-01 12:17:30,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:30,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050299285] [2023-09-01 12:17:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:30,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050299285] [2023-09-01 12:17:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050299285] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742400939] [2023-09-01 12:17:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:17:30,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:30,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:30,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:30,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:17:30,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:17:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 12:17:30,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:31,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:31,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 78 [2023-09-01 12:17:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:31,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:31,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:31,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:17:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:32,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742400939] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:32,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:32,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-09-01 12:17:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136720718] [2023-09-01 12:17:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:32,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:17:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:17:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:17:32,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:17:32,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 804 transitions, 16593 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:32,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:32,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:17:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:40,350 INFO L130 PetriNetUnfolder]: 22650/33576 cut-off events. [2023-09-01 12:17:40,350 INFO L131 PetriNetUnfolder]: For 730957/730957 co-relation queries the response was YES. [2023-09-01 12:17:40,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233740 conditions, 33576 events. 22650/33576 cut-off events. For 730957/730957 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 230581 event pairs, 2937 based on Foata normal form. 2/31672 useless extension candidates. Maximal degree in co-relation 233648. Up to 13072 conditions per place. [2023-09-01 12:17:40,672 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 575 selfloop transitions, 431 changer transitions 9/1015 dead transitions. [2023-09-01 12:17:40,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1015 transitions, 21100 flow [2023-09-01 12:17:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:17:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:17:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3142 transitions. [2023-09-01 12:17:40,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068894068894069 [2023-09-01 12:17:40,813 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3142 transitions. [2023-09-01 12:17:40,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3142 transitions. [2023-09-01 12:17:40,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:40,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3142 transitions. [2023-09-01 12:17:40,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.69230769230768) internal successors, (3142), 13 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:40,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:40,821 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:40,821 INFO L175 Difference]: Start difference. First operand has 253 places, 804 transitions, 16593 flow. Second operand 13 states and 3142 transitions. [2023-09-01 12:17:40,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1015 transitions, 21100 flow [2023-09-01 12:17:53,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1015 transitions, 20699 flow, removed 114 selfloop flow, removed 7 redundant places. [2023-09-01 12:17:53,401 INFO L231 Difference]: Finished difference. Result has 260 places, 808 transitions, 17294 flow [2023-09-01 12:17:53,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16309, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17294, PETRI_PLACES=260, PETRI_TRANSITIONS=808} [2023-09-01 12:17:53,402 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-09-01 12:17:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 808 transitions, 17294 flow [2023-09-01 12:17:53,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:53,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:53,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:17:53,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:17:53,605 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:17:53,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 749821040, now seen corresponding path program 5 times [2023-09-01 12:17:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:53,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595034622] [2023-09-01 12:17:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:53,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595034622] [2023-09-01 12:17:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595034622] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392654205] [2023-09-01 12:17:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:17:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:53,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:17:53,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:17:53,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:17:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:17:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:54,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:17:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:17:54,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:54,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:17:54,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:17:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:17:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392654205] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:55,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:17:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-09-01 12:17:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331987658] [2023-09-01 12:17:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:17:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:17:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:17:56,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:17:56,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 808 transitions, 17294 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:56,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:56,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:17:56,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:05,043 INFO L130 PetriNetUnfolder]: 23804/35379 cut-off events. [2023-09-01 12:18:05,043 INFO L131 PetriNetUnfolder]: For 714179/714179 co-relation queries the response was YES. [2023-09-01 12:18:05,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247453 conditions, 35379 events. 23804/35379 cut-off events. For 714179/714179 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 246156 event pairs, 2771 based on Foata normal form. 21/33406 useless extension candidates. Maximal degree in co-relation 247361. Up to 15046 conditions per place. [2023-09-01 12:18:05,449 INFO L137 encePairwiseOnDemand]: 578/594 looper letters, 635 selfloop transitions, 402 changer transitions 28/1065 dead transitions. [2023-09-01 12:18:05,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1065 transitions, 22815 flow [2023-09-01 12:18:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:18:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:18:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3138 transitions. [2023-09-01 12:18:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063714063714064 [2023-09-01 12:18:05,453 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3138 transitions. [2023-09-01 12:18:05,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3138 transitions. [2023-09-01 12:18:05,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:05,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3138 transitions. [2023-09-01 12:18:05,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.3846153846154) internal successors, (3138), 13 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:05,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:05,460 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:05,460 INFO L175 Difference]: Start difference. First operand has 260 places, 808 transitions, 17294 flow. Second operand 13 states and 3138 transitions. [2023-09-01 12:18:05,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1065 transitions, 22815 flow [2023-09-01 12:18:14,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1065 transitions, 21880 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-09-01 12:18:14,545 INFO L231 Difference]: Finished difference. Result has 265 places, 851 transitions, 18672 flow [2023-09-01 12:18:14,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=16449, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18672, PETRI_PLACES=265, PETRI_TRANSITIONS=851} [2023-09-01 12:18:14,546 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 227 predicate places. [2023-09-01 12:18:14,546 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 851 transitions, 18672 flow [2023-09-01 12:18:14,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:14,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:14,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:18:14,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:18:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:14,747 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:18:14,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1153144357, now seen corresponding path program 5 times [2023-09-01 12:18:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921446781] [2023-09-01 12:18:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:14,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:14,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921446781] [2023-09-01 12:18:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921446781] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:14,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838599070] [2023-09-01 12:18:14,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:18:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:14,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:14,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:18:15,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:18:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 12:18:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:15,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:18:15,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:18:15,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:18:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:18:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838599070] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:16,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:18:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2023-09-01 12:18:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248452755] [2023-09-01 12:18:16,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:18:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:18:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:18:16,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 594 [2023-09-01 12:18:16,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 851 transitions, 18672 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:16,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:16,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 594 [2023-09-01 12:18:16,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:25,260 INFO L130 PetriNetUnfolder]: 23805/35466 cut-off events. [2023-09-01 12:18:25,260 INFO L131 PetriNetUnfolder]: For 837453/837453 co-relation queries the response was YES. [2023-09-01 12:18:25,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255607 conditions, 35466 events. 23805/35466 cut-off events. For 837453/837453 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 247607 event pairs, 3077 based on Foata normal form. 6/33450 useless extension candidates. Maximal degree in co-relation 255510. Up to 13545 conditions per place. [2023-09-01 12:18:25,702 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 672 selfloop transitions, 403 changer transitions 19/1094 dead transitions. [2023-09-01 12:18:25,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1094 transitions, 24066 flow [2023-09-01 12:18:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:18:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:18:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3152 transitions. [2023-09-01 12:18:25,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081844081844082 [2023-09-01 12:18:25,704 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3152 transitions. [2023-09-01 12:18:25,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3152 transitions. [2023-09-01 12:18:25,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:25,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3152 transitions. [2023-09-01 12:18:25,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.46153846153845) internal successors, (3152), 13 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,711 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:25,711 INFO L175 Difference]: Start difference. First operand has 265 places, 851 transitions, 18672 flow. Second operand 13 states and 3152 transitions. [2023-09-01 12:18:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1094 transitions, 24066 flow [2023-09-01 12:18:40,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1094 transitions, 23313 flow, removed 167 selfloop flow, removed 8 redundant places. [2023-09-01 12:18:40,222 INFO L231 Difference]: Finished difference. Result has 274 places, 878 transitions, 19662 flow [2023-09-01 12:18:40,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18078, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19662, PETRI_PLACES=274, PETRI_TRANSITIONS=878} [2023-09-01 12:18:40,223 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 236 predicate places. [2023-09-01 12:18:40,223 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 878 transitions, 19662 flow [2023-09-01 12:18:40,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:40,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:40,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:18:40,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 12:18:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 12:18:40,425 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:18:40,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1760226384, now seen corresponding path program 6 times [2023-09-01 12:18:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060253342] [2023-09-01 12:18:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:18:40,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060253342] [2023-09-01 12:18:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060253342] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416792656] [2023-09-01 12:18:40,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:18:40,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:40,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:18:40,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:18:40,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:18:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:18:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:18:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:18:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:18:41,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:18:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416792656] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:18:41,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:18:41,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:18:41,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844863740] [2023-09-01 12:18:41,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:18:41,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:18:41,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:18:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:18:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:18:41,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:18:41,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 878 transitions, 19662 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:41,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:18:41,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:18:41,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:50,093 INFO L130 PetriNetUnfolder]: 23600/35175 cut-off events. [2023-09-01 12:18:50,094 INFO L131 PetriNetUnfolder]: For 838763/838763 co-relation queries the response was YES. [2023-09-01 12:18:50,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254979 conditions, 35175 events. 23600/35175 cut-off events. For 838763/838763 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 245469 event pairs, 4435 based on Foata normal form. 42/33199 useless extension candidates. Maximal degree in co-relation 254879. Up to 21113 conditions per place. [2023-09-01 12:18:50,666 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 542 selfloop transitions, 495 changer transitions 9/1046 dead transitions. [2023-09-01 12:18:50,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1046 transitions, 23362 flow [2023-09-01 12:18:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:18:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:18:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3761 transitions. [2023-09-01 12:18:50,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42210998877665545 [2023-09-01 12:18:50,670 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3761 transitions. [2023-09-01 12:18:50,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3761 transitions. [2023-09-01 12:18:50,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:50,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3761 transitions. [2023-09-01 12:18:50,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 250.73333333333332) internal successors, (3761), 15 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:50,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:50,679 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 594.0) internal successors, (9504), 16 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:50,679 INFO L175 Difference]: Start difference. First operand has 274 places, 878 transitions, 19662 flow. Second operand 15 states and 3761 transitions. [2023-09-01 12:18:50,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1046 transitions, 23362 flow [2023-09-01 12:19:03,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1046 transitions, 22685 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-09-01 12:19:03,760 INFO L231 Difference]: Finished difference. Result has 286 places, 878 transitions, 20243 flow [2023-09-01 12:19:03,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=18947, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20243, PETRI_PLACES=286, PETRI_TRANSITIONS=878} [2023-09-01 12:19:03,761 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 248 predicate places. [2023-09-01 12:19:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 878 transitions, 20243 flow [2023-09-01 12:19:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:03,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:03,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:03,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:03,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:03,970 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:19:03,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1381273835, now seen corresponding path program 6 times [2023-09-01 12:19:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041063338] [2023-09-01 12:19:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:03,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:04,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041063338] [2023-09-01 12:19:04,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041063338] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140956307] [2023-09-01 12:19:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:19:04,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:04,143 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:04,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:19:04,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:19:04,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:19:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:19:04,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:19:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140956307] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:19:04,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:19:04,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:19:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802763230] [2023-09-01 12:19:04,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:04,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:19:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:19:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:19:05,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 594 [2023-09-01 12:19:05,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 878 transitions, 20243 flow. Second operand has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:05,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:05,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 594 [2023-09-01 12:19:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:13,803 INFO L130 PetriNetUnfolder]: 23379/34834 cut-off events. [2023-09-01 12:19:13,803 INFO L131 PetriNetUnfolder]: For 763903/763903 co-relation queries the response was YES. [2023-09-01 12:19:14,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251152 conditions, 34834 events. 23379/34834 cut-off events. For 763903/763903 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 241847 event pairs, 3563 based on Foata normal form. 37/32869 useless extension candidates. Maximal degree in co-relation 251047. Up to 18492 conditions per place. [2023-09-01 12:19:14,420 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 447 selfloop transitions, 547 changer transitions 11/1005 dead transitions. [2023-09-01 12:19:14,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1005 transitions, 23446 flow [2023-09-01 12:19:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:19:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:19:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3263 transitions. [2023-09-01 12:19:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225589225589226 [2023-09-01 12:19:14,423 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3263 transitions. [2023-09-01 12:19:14,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3263 transitions. [2023-09-01 12:19:14,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:14,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3263 transitions. [2023-09-01 12:19:14,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,428 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 594.0) internal successors, (8316), 14 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:14,429 INFO L175 Difference]: Start difference. First operand has 286 places, 878 transitions, 20243 flow. Second operand 13 states and 3263 transitions. [2023-09-01 12:19:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1005 transitions, 23446 flow [2023-09-01 12:19:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1005 transitions, 22628 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-09-01 12:19:26,882 INFO L231 Difference]: Finished difference. Result has 293 places, 881 transitions, 20713 flow [2023-09-01 12:19:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19353, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=20713, PETRI_PLACES=293, PETRI_TRANSITIONS=881} [2023-09-01 12:19:26,883 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 255 predicate places. [2023-09-01 12:19:26,883 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 881 transitions, 20713 flow [2023-09-01 12:19:26,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.91666666666666) internal successors, (2879), 12 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:26,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:26,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:26,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:27,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:27,090 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:19:27,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash -91455062, now seen corresponding path program 7 times [2023-09-01 12:19:27,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669807497] [2023-09-01 12:19:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:27,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:27,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:27,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669807497] [2023-09-01 12:19:27,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669807497] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:27,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844761155] [2023-09-01 12:19:27,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:19:27,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:27,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:27,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:19:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 12:19:27,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:27,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:27,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-09-01 12:19:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:19:28,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:28,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:19:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:19:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844761155] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:28,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:19:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2023-09-01 12:19:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051444267] [2023-09-01 12:19:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:19:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:19:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:19:29,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 594 [2023-09-01 12:19:29,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 881 transitions, 20713 flow. Second operand has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:29,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:29,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 594 [2023-09-01 12:19:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:19:38,980 INFO L130 PetriNetUnfolder]: 23785/35596 cut-off events. [2023-09-01 12:19:38,981 INFO L131 PetriNetUnfolder]: For 791573/791573 co-relation queries the response was YES. [2023-09-01 12:19:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259730 conditions, 35596 events. 23785/35596 cut-off events. For 791573/791573 co-relation queries the response was YES. Maximal size of possible extension queue 1790. Compared 250623 event pairs, 2579 based on Foata normal form. 4/33598 useless extension candidates. Maximal degree in co-relation 259621. Up to 11880 conditions per place. [2023-09-01 12:19:39,516 INFO L137 encePairwiseOnDemand]: 577/594 looper letters, 493 selfloop transitions, 601 changer transitions 17/1111 dead transitions. [2023-09-01 12:19:39,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1111 transitions, 25815 flow [2023-09-01 12:19:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:19:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:19:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3829 transitions. [2023-09-01 12:19:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40288299663299665 [2023-09-01 12:19:39,519 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3829 transitions. [2023-09-01 12:19:39,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3829 transitions. [2023-09-01 12:19:39,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:19:39,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3829 transitions. [2023-09-01 12:19:39,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 239.3125) internal successors, (3829), 16 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:39,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:39,526 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:39,526 INFO L175 Difference]: Start difference. First operand has 293 places, 881 transitions, 20713 flow. Second operand 16 states and 3829 transitions. [2023-09-01 12:19:39,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1111 transitions, 25815 flow [2023-09-01 12:19:52,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1111 transitions, 24699 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-09-01 12:19:52,499 INFO L231 Difference]: Finished difference. Result has 304 places, 910 transitions, 21947 flow [2023-09-01 12:19:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=19661, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21947, PETRI_PLACES=304, PETRI_TRANSITIONS=910} [2023-09-01 12:19:52,500 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 266 predicate places. [2023-09-01 12:19:52,500 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 910 transitions, 21947 flow [2023-09-01 12:19:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.3) internal successors, (2283), 10 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:52,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:19:52,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:19:52,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:19:52,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 12:19:52,707 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:19:52,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:19:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash -187961245, now seen corresponding path program 4 times [2023-09-01 12:19:52,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:19:52,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072838360] [2023-09-01 12:19:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:19:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:19:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:19:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:53,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:19:53,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072838360] [2023-09-01 12:19:53,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072838360] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:53,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652426694] [2023-09-01 12:19:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:19:53,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:19:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:19:53,149 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:19:53,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:19:53,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:19:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:19:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:19:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:19:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:53,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:19:53,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:19:53,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:19:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:19:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652426694] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:19:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:19:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2023-09-01 12:19:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516830206] [2023-09-01 12:19:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:19:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:19:54,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:19:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:19:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:19:55,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-09-01 12:19:55,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 910 transitions, 21947 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:19:55,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:19:55,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-09-01 12:19:55,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:05,693 INFO L130 PetriNetUnfolder]: 23718/35976 cut-off events. [2023-09-01 12:20:05,693 INFO L131 PetriNetUnfolder]: For 906504/906504 co-relation queries the response was YES. [2023-09-01 12:20:05,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256795 conditions, 35976 events. 23718/35976 cut-off events. For 906504/906504 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 260749 event pairs, 5803 based on Foata normal form. 586/34458 useless extension candidates. Maximal degree in co-relation 256682. Up to 11578 conditions per place. [2023-09-01 12:20:06,116 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 567 selfloop transitions, 563 changer transitions 45/1175 dead transitions. [2023-09-01 12:20:06,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1175 transitions, 27825 flow [2023-09-01 12:20:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:20:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:20:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4210 transitions. [2023-09-01 12:20:06,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169142404436522 [2023-09-01 12:20:06,119 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4210 transitions. [2023-09-01 12:20:06,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4210 transitions. [2023-09-01 12:20:06,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:06,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4210 transitions. [2023-09-01 12:20:06,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 247.64705882352942) internal successors, (4210), 17 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:06,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:06,127 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:06,127 INFO L175 Difference]: Start difference. First operand has 304 places, 910 transitions, 21947 flow. Second operand 17 states and 4210 transitions. [2023-09-01 12:20:06,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1175 transitions, 27825 flow [2023-09-01 12:20:20,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1175 transitions, 26725 flow, removed 103 selfloop flow, removed 8 redundant places. [2023-09-01 12:20:20,244 INFO L231 Difference]: Finished difference. Result has 320 places, 949 transitions, 23534 flow [2023-09-01 12:20:20,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=20976, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23534, PETRI_PLACES=320, PETRI_TRANSITIONS=949} [2023-09-01 12:20:20,245 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2023-09-01 12:20:20,245 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 949 transitions, 23534 flow [2023-09-01 12:20:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:20,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:20,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:20,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 12:20:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:20,446 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:20:20,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1982050721, now seen corresponding path program 7 times [2023-09-01 12:20:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:20,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631671844] [2023-09-01 12:20:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:20,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631671844] [2023-09-01 12:20:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631671844] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497407734] [2023-09-01 12:20:20,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:20:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:20,606 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:20,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:20:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:20,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:20:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:21,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:21,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 101 [2023-09-01 12:20:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:21,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:20:21,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:21,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:20:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:23,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497407734] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:23,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:20:23,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 11] total 28 [2023-09-01 12:20:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757741523] [2023-09-01 12:20:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:20:23,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:20:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:20:23,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:20:24,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 594 [2023-09-01 12:20:24,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 949 transitions, 23534 flow. Second operand has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:24,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:24,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 594 [2023-09-01 12:20:24,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:20:37,200 INFO L130 PetriNetUnfolder]: 23408/35373 cut-off events. [2023-09-01 12:20:37,201 INFO L131 PetriNetUnfolder]: For 958898/958898 co-relation queries the response was YES. [2023-09-01 12:20:37,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264964 conditions, 35373 events. 23408/35373 cut-off events. For 958898/958898 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 254271 event pairs, 3727 based on Foata normal form. 1/33270 useless extension candidates. Maximal degree in co-relation 264843. Up to 15123 conditions per place. [2023-09-01 12:20:37,626 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 666 selfloop transitions, 441 changer transitions 23/1130 dead transitions. [2023-09-01 12:20:37,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1130 transitions, 27588 flow [2023-09-01 12:20:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:20:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:20:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3856 transitions. [2023-09-01 12:20:37,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057239057239057 [2023-09-01 12:20:37,631 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3856 transitions. [2023-09-01 12:20:37,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3856 transitions. [2023-09-01 12:20:37,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:20:37,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3856 transitions. [2023-09-01 12:20:37,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 594.0) internal successors, (10098), 17 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:37,641 INFO L175 Difference]: Start difference. First operand has 320 places, 949 transitions, 23534 flow. Second operand 16 states and 3856 transitions. [2023-09-01 12:20:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1130 transitions, 27588 flow [2023-09-01 12:20:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1130 transitions, 27046 flow, removed 87 selfloop flow, removed 8 redundant places. [2023-09-01 12:20:56,627 INFO L231 Difference]: Finished difference. Result has 330 places, 960 transitions, 24189 flow [2023-09-01 12:20:56,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23008, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24189, PETRI_PLACES=330, PETRI_TRANSITIONS=960} [2023-09-01 12:20:56,628 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-09-01 12:20:56,628 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 960 transitions, 24189 flow [2023-09-01 12:20:56,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 229.76923076923077) internal successors, (2987), 13 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:56,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:20:56,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:20:56,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 12:20:56,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:56,829 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:20:56,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:20:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1622135649, now seen corresponding path program 8 times [2023-09-01 12:20:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:20:56,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548126169] [2023-09-01 12:20:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:20:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:20:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:20:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:20:56,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:20:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548126169] [2023-09-01 12:20:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548126169] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:20:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087657901] [2023-09-01 12:20:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:20:56,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:20:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:20:56,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:20:57,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:20:57,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:20:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:20:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 12:20:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:20:57,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:20:57,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:20:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:20:57,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:20:57,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087657901] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:20:57,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:20:57,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:20:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498990636] [2023-09-01 12:20:57,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:20:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:20:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:20:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:20:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:20:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:20:58,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 960 transitions, 24189 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:20:58,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:20:58,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:20:58,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:07,967 INFO L130 PetriNetUnfolder]: 23246/35167 cut-off events. [2023-09-01 12:21:07,967 INFO L131 PetriNetUnfolder]: For 947672/947672 co-relation queries the response was YES. [2023-09-01 12:21:08,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267558 conditions, 35167 events. 23246/35167 cut-off events. For 947672/947672 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 252388 event pairs, 3657 based on Foata normal form. 53/33124 useless extension candidates. Maximal degree in co-relation 267435. Up to 17902 conditions per place. [2023-09-01 12:21:08,388 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 496 selfloop transitions, 598 changer transitions 25/1119 dead transitions. [2023-09-01 12:21:08,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1119 transitions, 27653 flow [2023-09-01 12:21:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:21:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:21:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4484 transitions. [2023-09-01 12:21:08,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41937897493453047 [2023-09-01 12:21:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4484 transitions. [2023-09-01 12:21:08,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4484 transitions. [2023-09-01 12:21:08,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:08,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4484 transitions. [2023-09-01 12:21:08,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 249.11111111111111) internal successors, (4484), 18 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:08,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:08,399 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:08,399 INFO L175 Difference]: Start difference. First operand has 330 places, 960 transitions, 24189 flow. Second operand 18 states and 4484 transitions. [2023-09-01 12:21:08,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1119 transitions, 27653 flow [2023-09-01 12:21:25,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1119 transitions, 26995 flow, removed 54 selfloop flow, removed 9 redundant places. [2023-09-01 12:21:25,740 INFO L231 Difference]: Finished difference. Result has 339 places, 960 transitions, 24844 flow [2023-09-01 12:21:25,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23510, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24844, PETRI_PLACES=339, PETRI_TRANSITIONS=960} [2023-09-01 12:21:25,741 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 301 predicate places. [2023-09-01 12:21:25,741 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 960 transitions, 24844 flow [2023-09-01 12:21:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:25,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:25,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:25,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:25,942 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:21:25,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 857805660, now seen corresponding path program 8 times [2023-09-01 12:21:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481684010] [2023-09-01 12:21:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:21:26,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:26,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481684010] [2023-09-01 12:21:26,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481684010] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:26,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056199375] [2023-09-01 12:21:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:21:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:26,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:26,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:21:26,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:21:26,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:21:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 12:21:26,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:21:26,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:21:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056199375] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:26,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:21:26,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 15 [2023-09-01 12:21:26,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527815099] [2023-09-01 12:21:26,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:26,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:21:26,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:21:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:21:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:21:27,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 960 transitions, 24844 flow. Second operand has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:27,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:27,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:21:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:36,624 INFO L130 PetriNetUnfolder]: 22363/34077 cut-off events. [2023-09-01 12:21:36,624 INFO L131 PetriNetUnfolder]: For 979654/979654 co-relation queries the response was YES. [2023-09-01 12:21:37,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257250 conditions, 34077 events. 22363/34077 cut-off events. For 979654/979654 co-relation queries the response was YES. Maximal size of possible extension queue 1854. Compared 247425 event pairs, 3725 based on Foata normal form. 316/32313 useless extension candidates. Maximal degree in co-relation 257125. Up to 21107 conditions per place. [2023-09-01 12:21:37,232 INFO L137 encePairwiseOnDemand]: 579/594 looper letters, 624 selfloop transitions, 541 changer transitions 26/1191 dead transitions. [2023-09-01 12:21:37,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1191 transitions, 29571 flow [2023-09-01 12:21:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:21:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:21:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4531 transitions. [2023-09-01 12:21:37,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423774784885896 [2023-09-01 12:21:37,237 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4531 transitions. [2023-09-01 12:21:37,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4531 transitions. [2023-09-01 12:21:37,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:37,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4531 transitions. [2023-09-01 12:21:37,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 251.72222222222223) internal successors, (4531), 18 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:37,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:37,247 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 594.0) internal successors, (11286), 19 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:37,247 INFO L175 Difference]: Start difference. First operand has 339 places, 960 transitions, 24844 flow. Second operand 18 states and 4531 transitions. [2023-09-01 12:21:37,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1191 transitions, 29571 flow [2023-09-01 12:21:54,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1191 transitions, 28540 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-09-01 12:21:54,570 INFO L231 Difference]: Finished difference. Result has 350 places, 981 transitions, 25652 flow [2023-09-01 12:21:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=23484, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25652, PETRI_PLACES=350, PETRI_TRANSITIONS=981} [2023-09-01 12:21:54,571 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 312 predicate places. [2023-09-01 12:21:54,571 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 981 transitions, 25652 flow [2023-09-01 12:21:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 239.0909090909091) internal successors, (2630), 11 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:54,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 12:21:54,772 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:21:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1131905989, now seen corresponding path program 5 times [2023-09-01 12:21:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316886419] [2023-09-01 12:21:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:21:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316886419] [2023-09-01 12:21:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316886419] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875944846] [2023-09-01 12:21:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:21:55,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:55,181 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:21:55,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:21:55,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:21:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 12:21:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:21:55,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:55,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:21:55,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:21:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:21:57,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875944846] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:57,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:21:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-09-01 12:21:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481434433] [2023-09-01 12:21:57,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:57,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:21:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:21:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:21:57,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-09-01 12:21:57,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 981 transitions, 25652 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:57,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-09-01 12:21:57,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:08,309 INFO L130 PetriNetUnfolder]: 22299/33910 cut-off events. [2023-09-01 12:22:08,309 INFO L131 PetriNetUnfolder]: For 1017741/1017741 co-relation queries the response was YES. [2023-09-01 12:22:08,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259913 conditions, 33910 events. 22299/33910 cut-off events. For 1017741/1017741 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 245138 event pairs, 5229 based on Foata normal form. 15/31845 useless extension candidates. Maximal degree in co-relation 259783. Up to 10842 conditions per place. [2023-09-01 12:22:08,714 INFO L137 encePairwiseOnDemand]: 581/594 looper letters, 570 selfloop transitions, 554 changer transitions 63/1187 dead transitions. [2023-09-01 12:22:08,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1187 transitions, 30300 flow [2023-09-01 12:22:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:22:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:22:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4194 transitions. [2023-09-01 12:22:08,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41532976827094475 [2023-09-01 12:22:08,717 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4194 transitions. [2023-09-01 12:22:08,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4194 transitions. [2023-09-01 12:22:08,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:08,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4194 transitions. [2023-09-01 12:22:08,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 246.7058823529412) internal successors, (4194), 17 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:08,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:08,727 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:08,727 INFO L175 Difference]: Start difference. First operand has 350 places, 981 transitions, 25652 flow. Second operand 17 states and 4194 transitions. [2023-09-01 12:22:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1187 transitions, 30300 flow [2023-09-01 12:22:24,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1187 transitions, 29307 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-09-01 12:22:24,393 INFO L231 Difference]: Finished difference. Result has 360 places, 957 transitions, 25119 flow [2023-09-01 12:22:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24680, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25119, PETRI_PLACES=360, PETRI_TRANSITIONS=957} [2023-09-01 12:22:24,394 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 322 predicate places. [2023-09-01 12:22:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 957 transitions, 25119 flow [2023-09-01 12:22:24,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:22:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:22:24,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 12:22:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 12:22:24,596 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:22:24,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:22:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1496257113, now seen corresponding path program 6 times [2023-09-01 12:22:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:22:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96807996] [2023-09-01 12:22:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:22:24,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96807996] [2023-09-01 12:22:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96807996] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:22:24,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123183526] [2023-09-01 12:22:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:22:24,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:24,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:22:24,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:22:24,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 12:22:25,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:22:25,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:22:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 12:22:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:22:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:22:25,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:22:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123183526] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:22:25,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:22:25,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-09-01 12:22:25,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701286273] [2023-09-01 12:22:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:22:25,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:22:25,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:22:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:22:25,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:22:25,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 594 [2023-09-01 12:22:25,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 957 transitions, 25119 flow. Second operand has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:25,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:25,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 594 [2023-09-01 12:22:25,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:35,565 INFO L130 PetriNetUnfolder]: 22265/33767 cut-off events. [2023-09-01 12:22:35,566 INFO L131 PetriNetUnfolder]: For 1027068/1027068 co-relation queries the response was YES. [2023-09-01 12:22:35,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258412 conditions, 33767 events. 22265/33767 cut-off events. For 1027068/1027068 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 242254 event pairs, 5355 based on Foata normal form. 15/31668 useless extension candidates. Maximal degree in co-relation 258280. Up to 12820 conditions per place. [2023-09-01 12:22:35,973 INFO L137 encePairwiseOnDemand]: 583/594 looper letters, 467 selfloop transitions, 592 changer transitions 30/1089 dead transitions. [2023-09-01 12:22:35,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1089 transitions, 29065 flow [2023-09-01 12:22:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:22:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:22:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2310 transitions. [2023-09-01 12:22:35,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-09-01 12:22:35,975 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2310 transitions. [2023-09-01 12:22:35,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2310 transitions. [2023-09-01 12:22:35,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:35,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2310 transitions. [2023-09-01 12:22:35,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.6666666666667) internal successors, (2310), 9 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:35,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:35,979 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 594.0) internal successors, (5940), 10 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:35,979 INFO L175 Difference]: Start difference. First operand has 360 places, 957 transitions, 25119 flow. Second operand 9 states and 2310 transitions. [2023-09-01 12:22:35,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1089 transitions, 29065 flow [2023-09-01 12:22:52,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1089 transitions, 28460 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-09-01 12:22:52,229 INFO L231 Difference]: Finished difference. Result has 358 places, 969 transitions, 26430 flow [2023-09-01 12:22:52,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=24514, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26430, PETRI_PLACES=358, PETRI_TRANSITIONS=969} [2023-09-01 12:22:52,230 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 320 predicate places. [2023-09-01 12:22:52,230 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 969 transitions, 26430 flow [2023-09-01 12:22:52,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.55555555555554) internal successors, (2210), 9 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:52,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:22:52,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:22:52,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 12:22:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 12:22:52,431 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:22:52,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:22:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1657957736, now seen corresponding path program 9 times [2023-09-01 12:22:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:22:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188578057] [2023-09-01 12:22:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:22:52,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188578057] [2023-09-01 12:22:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188578057] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:22:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803242726] [2023-09-01 12:22:52,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:22:52,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:22:52,593 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:22:52,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 12:22:52,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:22:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:22:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 12:22:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:22:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:22:53,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:22:53,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803242726] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:22:53,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:22:53,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:22:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828769780] [2023-09-01 12:22:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:22:53,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:22:53,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:22:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:22:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:22:53,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:22:53,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 969 transitions, 26430 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:53,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:53,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:22:53,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:23:02,992 INFO L130 PetriNetUnfolder]: 22063/33348 cut-off events. [2023-09-01 12:23:02,992 INFO L131 PetriNetUnfolder]: For 1022972/1022972 co-relation queries the response was YES. [2023-09-01 12:23:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265553 conditions, 33348 events. 22063/33348 cut-off events. For 1022972/1022972 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 237870 event pairs, 3641 based on Foata normal form. 4/31238 useless extension candidates. Maximal degree in co-relation 265420. Up to 20787 conditions per place. [2023-09-01 12:23:03,367 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 620 selfloop transitions, 510 changer transitions 15/1145 dead transitions. [2023-09-01 12:23:03,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1145 transitions, 30506 flow [2023-09-01 12:23:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:23:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:23:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4252 transitions. [2023-09-01 12:23:03,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42107347989700933 [2023-09-01 12:23:03,370 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4252 transitions. [2023-09-01 12:23:03,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4252 transitions. [2023-09-01 12:23:03,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:23:03,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4252 transitions. [2023-09-01 12:23:03,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 250.11764705882354) internal successors, (4252), 17 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:03,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:03,380 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:03,380 INFO L175 Difference]: Start difference. First operand has 358 places, 969 transitions, 26430 flow. Second operand 17 states and 4252 transitions. [2023-09-01 12:23:03,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1145 transitions, 30506 flow [2023-09-01 12:23:22,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1145 transitions, 29330 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-09-01 12:23:22,287 INFO L231 Difference]: Finished difference. Result has 368 places, 970 transitions, 26325 flow [2023-09-01 12:23:22,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=25278, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26325, PETRI_PLACES=368, PETRI_TRANSITIONS=970} [2023-09-01 12:23:22,288 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 330 predicate places. [2023-09-01 12:23:22,288 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 970 transitions, 26325 flow [2023-09-01 12:23:22,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:22,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:23:22,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:23:22,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 12:23:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:23:22,490 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:23:22,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:23:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 485061456, now seen corresponding path program 10 times [2023-09-01 12:23:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:23:22,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858223980] [2023-09-01 12:23:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:23:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:23:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:23:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:23:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:23:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858223980] [2023-09-01 12:23:22,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858223980] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:23:22,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159972042] [2023-09-01 12:23:22,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:23:22,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:23:22,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:23:22,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:23:22,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 12:23:22,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:23:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:23:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:23:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:23:23,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:23:23,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 79 [2023-09-01 12:23:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:23:23,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:23:23,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:23:23,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:23:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:23:24,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159972042] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:23:24,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:23:24,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 11] total 24 [2023-09-01 12:23:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125112533] [2023-09-01 12:23:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:23:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:23:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:23:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:23:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:23:25,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 594 [2023-09-01 12:23:25,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 970 transitions, 26325 flow. Second operand has 8 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:25,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:23:25,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 594 [2023-09-01 12:23:25,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:23:49,557 INFO L130 PetriNetUnfolder]: 48741/73393 cut-off events. [2023-09-01 12:23:49,557 INFO L131 PetriNetUnfolder]: For 2301921/2301921 co-relation queries the response was YES. [2023-09-01 12:23:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570425 conditions, 73393 events. 48741/73393 cut-off events. For 2301921/2301921 co-relation queries the response was YES. Maximal size of possible extension queue 3685. Compared 575758 event pairs, 5734 based on Foata normal form. 5/68840 useless extension candidates. Maximal degree in co-relation 570293. Up to 27290 conditions per place. [2023-09-01 12:23:51,072 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 1274 selfloop transitions, 1714 changer transitions 23/3011 dead transitions. [2023-09-01 12:23:51,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 3011 transitions, 86789 flow [2023-09-01 12:23:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:23:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:23:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 6644 transitions. [2023-09-01 12:23:51,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301994301994302 [2023-09-01 12:23:51,076 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 6644 transitions. [2023-09-01 12:23:51,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 6644 transitions. [2023-09-01 12:23:51,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:23:51,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 6644 transitions. [2023-09-01 12:23:51,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 255.53846153846155) internal successors, (6644), 26 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:51,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 594.0) internal successors, (16038), 27 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:51,092 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 594.0) internal successors, (16038), 27 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:23:51,092 INFO L175 Difference]: Start difference. First operand has 368 places, 970 transitions, 26325 flow. Second operand 26 states and 6644 transitions. [2023-09-01 12:23:51,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 3011 transitions, 86789 flow [2023-09-01 12:25:07,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 3011 transitions, 83949 flow, removed 48 selfloop flow, removed 10 redundant places. [2023-09-01 12:25:07,745 INFO L231 Difference]: Finished difference. Result has 402 places, 2390 transitions, 73220 flow [2023-09-01 12:25:07,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=25456, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=73220, PETRI_PLACES=402, PETRI_TRANSITIONS=2390} [2023-09-01 12:25:07,746 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 364 predicate places. [2023-09-01 12:25:07,746 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 2390 transitions, 73220 flow [2023-09-01 12:25:07,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 244.875) internal successors, (1959), 8 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:07,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:25:07,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:25:07,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 12:25:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:25:07,948 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:25:07,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:25:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash -859825455, now seen corresponding path program 9 times [2023-09-01 12:25:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:25:07,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717821829] [2023-09-01 12:25:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:25:07,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:25:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:25:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:25:08,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:25:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717821829] [2023-09-01 12:25:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717821829] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:25:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461682098] [2023-09-01 12:25:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:25:08,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:25:08,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:25:08,117 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:25:08,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 12:25:08,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:25:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:25:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 12:25:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:25:08,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:25:08,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2023-09-01 12:25:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:25:08,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:25:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461682098] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:25:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:25:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2023-09-01 12:25:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139869145] [2023-09-01 12:25:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:25:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:25:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:25:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:25:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:25:09,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 594 [2023-09-01 12:25:09,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 2390 transitions, 73220 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:09,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:25:09,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 594 [2023-09-01 12:25:09,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:25:44,599 INFO L130 PetriNetUnfolder]: 48684/73375 cut-off events. [2023-09-01 12:25:44,600 INFO L131 PetriNetUnfolder]: For 2861864/2861864 co-relation queries the response was YES. [2023-09-01 12:25:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624709 conditions, 73375 events. 48684/73375 cut-off events. For 2861864/2861864 co-relation queries the response was YES. Maximal size of possible extension queue 3674. Compared 573621 event pairs, 6953 based on Foata normal form. 8/68825 useless extension candidates. Maximal degree in co-relation 624560. Up to 37016 conditions per place. [2023-09-01 12:25:46,464 INFO L137 encePairwiseOnDemand]: 580/594 looper letters, 999 selfloop transitions, 1589 changer transitions 28/2616 dead transitions. [2023-09-01 12:25:46,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2616 transitions, 80945 flow [2023-09-01 12:25:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:25:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:25:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4241 transitions. [2023-09-01 12:25:46,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41998415527827293 [2023-09-01 12:25:46,467 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4241 transitions. [2023-09-01 12:25:46,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4241 transitions. [2023-09-01 12:25:46,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:25:46,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4241 transitions. [2023-09-01 12:25:46,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 249.47058823529412) internal successors, (4241), 17 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:46,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:46,474 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 594.0) internal successors, (10692), 18 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:25:46,475 INFO L175 Difference]: Start difference. First operand has 402 places, 2390 transitions, 73220 flow. Second operand 17 states and 4241 transitions. [2023-09-01 12:25:46,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2616 transitions, 80945 flow [2023-09-01 12:27:54,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 2616 transitions, 79925 flow, removed 510 selfloop flow, removed 0 redundant places. [2023-09-01 12:27:54,683 INFO L231 Difference]: Finished difference. Result has 421 places, 2383 transitions, 75396 flow [2023-09-01 12:27:54,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=594, PETRI_DIFFERENCE_MINUEND_FLOW=72296, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=75396, PETRI_PLACES=421, PETRI_TRANSITIONS=2383} [2023-09-01 12:27:54,685 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 383 predicate places. [2023-09-01 12:27:54,685 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 2383 transitions, 75396 flow [2023-09-01 12:27:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:54,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:54,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:54,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:54,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 12:27:54,886 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:27:54,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1854259699, now seen corresponding path program 7 times [2023-09-01 12:27:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191895896] [2023-09-01 12:27:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191895896] [2023-09-01 12:27:55,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191895896] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:55,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045589160] [2023-09-01 12:27:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:27:55,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:55,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:55,317 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:55,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 12:27:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:55,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 12:27:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:55,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:55,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 73 [2023-09-01 12:27:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:56,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:27:56,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-09-01 12:27:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:57,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045589160] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:57,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:27:57,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2023-09-01 12:27:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63654640] [2023-09-01 12:27:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:57,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:57,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:27:58,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 594 [2023-09-01 12:27:58,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 2383 transitions, 75396 flow. Second operand has 10 states, 10 states have (on average 236.3) internal successors, (2363), 10 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:58,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:58,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 594 [2023-09-01 12:27:58,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15